United States
               Environmental Protection
               Agency
Office of Water
Regulations and Standards
Washington, DC 20460
^PA,440/5-83/005.
September 1988
               Water
               Mercury
               Water Quality Standards
               Criteria Summaries:
               A Compilation
               of State/Federal  Criteria
,1

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                           DISCLAIMER

     This publication was prepared by Battelle under contract  to
the  U.S. Environmental Protection Agency (Contract  68-03-3534).
Secondary information sources were used to compile data presented
in .this document.  Each State was  given an opportunity to  review
and,provide comments on a draft  of this information document.  In
no  event  shall either the United States or  Battelle  have  any
responsibility or liability for  any use,  misuse, or reliance upon
the  information  contained herein,  nor does  either  warrant  or
otherwise represent in any way the accuracy, adequacy,  efficacy,
or applicability of the contents hereof.

     The  reader should consult  the water quality standards of  a
particular State for exact regulatory language applicable to that
State.   Copies of State water quality standards may be  obtained
from   the  State's  Water  Pollution  Control  Agency   or   its
equivalent.

     Additional information may  also be obtained from the:

                        Standards  Branch
            Criteria and Standards Division (WH-585)
            Office of Water Regulations and Standards
              U.S. Environmental Protection Agency
                     Washington, D.C.   20460
                          202-475-7315
     This document may be obtained only from the National Technical
Information Service (NTIS) at the following address:

                National Technical Information Service
                       5285 Front Royal Road
                    Springfield, Virginia 22161
                         703-487-4650

     The NTIS order number is: PB89-141378	:	

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INTRODUCTION

This  digest  is   compiled  to provide general information to the public as well
as  to  Federal,   State,  and  local  officials.  It contains excerpts from  the
individual   Federal-State   water  quality  standards  establishing  pollutant
specific  criteria  for interstate surface waters.  The water quality standards
program  is  implemented  by  the  U.  S. Environmental Protection Agency where
responsibility   for  providing   water   quality  recommendations,  approving
State-adopted  standards  for  interstate  waters,  evaluating adherence to  the
standards,  and  overseeing enforcement  of  standards  compliance,  has  been
mandated by Congress.

Standards,  a nationwide strategy for surface water quality management, contain
three  major  elements:  the use (recreation, drinking water, fish and wildlife
propagation,  industrial,   or  agricultural) to be made of the navigable water;
criteria  to  protect  these  uses; and an antidegradation statement to protect
existing high quality waters, from degradation by the addition of pollutants.
Guidance  for the  development of standards by individual States is contained in
two  EPA documents entitled ffater Quality Standards Handbook (1983) and Quality
Criteria for Eater (1986).                          	            	

Available  chronic  data  indicate  that  methylmercury is the most chronically
toxic  of  the tested mercury compounds.  Derivation of water quality criterion
for  mercury  is   more  complex  than for most metals because of.methylation of
mercury  in  sediment,  in  fish,  and  in  the food chain of fish.  Apparently
almost   all   mercury   currently  being  discharged  is  mercury(II).    Thus
mercury(II)-  should  be the"only important possible cause of acute toxicity and
the  Criterion  Maximum  Concentrations  can  be  based on the acute values for
mercury(II).

The 1986 Quality Criteria for ffater recommends the following:

    Freshwater Aquatic Organisms and Their Uses:
         acute     2.4 ug/1
         chronic   0.012 ug/1

    Saltwajer Aquatic Organisms and Their Uses:
         acute     2.1 ug/1
         chronic   0.025 ug/1

    Human Health:
         144 ng/1  water and contaminated aquatic organism ingestion
         146 ng/1  contaminated aquatic organism consumption only

Since  water  quality  standards  are  revised  from  time  to  time, following
procedures  set forth in the Clean Water Act, individual entries in this digest
may  be  superseded.    This digest will be updated periodically.  Because this
publication  is  intended   for use only as a general information reference, the
reader  needs  to  refer  to  the  current  approved water quality standards to
obtain  the latest information for special purposes and applications. These can
be  obtained  from  the  State  water  pollution .control  agencies  or the EPA
Regional Offices.


                                     -2-

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                                  REFERENCES

5   California Water Quality Standards by River Basins, ca. 1975

    For  more detailed information on selected basins, sub-basins and stretches
    of  streams  and  coastal  areas  refer  to  California State Water Quality
    Standards.

25  Missouri  Water  Quality  Standards, 10 CSR 20-7.031, Rule of Department of
    Natural Resources: Division 20 - Clean Water Commission.

31  Water  Quality  Standards  for  Interstate  and  Intrastate  Streams in New
    Mexico, State of New Mexico Water Quality Control Commission, 1988.

35  Ohio  Water  Quality  Standards, Chapter 3745-1 of the Administrative Code,
    Ohio Environmental Protection Agency, 1985.

42  Tennessee's  Water  Quality  Criteria  and  Stream  Use Classifications for
    Interstate  and  Intrastate Streams, Tennessee Water Quality Control Board:
    Department of Health and Environment, 1987.

43  Texas  Surface  Water  Quality  Standards,  Texas  Water  Commission,  Rule
    Change, 1988.

44  Utah  Standards  of  Quality  for  Waters of the State, Wastevater Disposal
    Regulations:  Part  II,  State  of  Utah  Department of Health: Division of
    Environmental Health, 1988.                  .

46  Virginia Water Quality Standards, State Water Control Board, 1987.

48  Water  Quality  Standards,  West  Virginia  Legislative  Rules, State Water
    Resources Board, 1985.

51  Water Quality Standards for American Samoa, 1984, pp. 16-18.

52  Water   Quality   Standards  of  the  District  of  Columbia,  Chapter  42,
    Department of Consumer and Regulatory Affairs, 1985, Section 4206.1.

53  Revised   Guam  Water  Quality  Standards,  Guam  Environmental  Protection
    Agency, 1984, pp. 7, 12-13.

54  Commonwealth  of  Northern  Mariana  Islands Marine and Fresh Water Quality
    Standards, Commonwealth Register, Vol. 8 No. 5, 1986, pp. 4464-4468.

55  Puerto  Rico  Water  Quality  Standards  Regulation,  Environmental Quality
    Board, 1983.

56  Marine  and  Fresh  Water  Quality  Standard  Regulations, Trust Territory,
    1986, pp. 5, 8-10.

57  Water  Quality  Standards  for  Coastal Waters of the Virgin Islands, Title
    12, Chapter 7, Subchapter 186, 1985, p. 263.


                                     -3-

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 ENVIRONMENT  REPORTER.   The  Bureau  of National Affairs,  Inc.  Washington,  D.C.
     20037

 1    Pages  701:1002,  July 9,  1982,  701:1003-1004,  June 26,  1981,  701:1005-1010,
     September 5,  1980

 2    Pages 706:1005-1009, November 7,  1986

 3    Pages 711:1002-1003, 1017-1018,  1021, February 7,  1986

 4    Pages 716:1004-1005, August  30,  1985

 6    Pages 726:1005-1006, March 22,  1985,  726:1011,  August 22, 1986

 7    Pages 731:1002, 1006-1007, May  14,  1982

 8    Pages 736:1001, 1006-iOlO, March  28,  1986

 9    Pages 746:1010.1-1010.2,  September  5,  1986,  746:1011-1014,  January 21,  1983

 10   Pages 751:0504-0505, December 27, 1985

 11   Page  756:1002, September  20,  1985

 12   Pages 761:1026-1028, January  23,  1987

 13   Pages  766:0505,  0514,   March 28,  1986, 766:0508,  0520-0521, May 25, 1984,
     766:0515, December 27,  1984

 14   Pages  771:1002,  1013-1017,  January 10,   1986,  771:1003-1006, August 10,
     1984,  771:1007-1009,  December 26, 1980

 15   Pages 776:1005-1006,  February 13, 1987

 16   Pages 781:1011-1012,  March 27, 1987

 17   Pages 786:1007-1009,  November 29, 1985

 18   Pages 791:1005-1006,  January  18, 1985

 19   Pages 796:0104-0109,  0127-0128, April  18, 1986

 20   Page  801:1002, April 19,  1985

21   Page  806:1002, June  21, 1985

22   Pages  811:1003-1004,  February 13, 1987

23   Pages  816:1003, 1009-1010, June 25, 1982

24   Pages  821:1002-1003,  October  25, 1985


                                                                                   *
                                   .  -4-

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25  Pages  826:1004,  May 9, 1986, 826:1004.1, February 7, 1986, 826:1007-1010,
    June 21, 1985

26  Pages 831:1004-1009, April 19, 1985

27  Pages 836:1003-1006, March 27, 1987

28  Pages  841:1001, 1011, 1013, 1075, 1087, February 22, 1985, 841:1005, 1008,
    1025, 1065, June 29, 1984-

29  Pages 846:1002-1004, 1008-1009, October 5, 1984

30  Pages 851:1004, 1009-1010, 1017-1019, 1021, April 11, 1986

31  Page 856:1001, June 11, 1982                                   .._...

32  Pages 861:1007-1012, 1023, 1032-1036, November 29, 1985

33  Pages 866:1006, December 27, 1985, 866:1009-1013, August 29, 1986

34  Pages 871:1002-1004, June 7, 1985

35  Pages 876:1003-1004, 1023, December 27, 1985, 876:1011, May 24, 1985

36  Pages. 881:1003-1008, 1014, September 26, 1986

37  Pages 886": 1006-1047, May 9, 1986

38  Pages 891:1004, 1006-1009, August 9, 1985

39  Pages 901:1002-1005, 1012-1016, August  9,  1985

40  Pages 906:1004, 1006-1009, November 29, 1985

41  Pages 911:1003-1005, March 22, 1985

45  Page 931:1006,  March 22, 1985

47  Pages 941:1003-1005, October 21,  1983

49  Pages 951:1001-1002, March  13, 1987

50  Page 956:1005,  July 5,  1985

52  Pages 741:1002-1003, March  28, 1986

55  Page 896:1003,  December 23, 1983
                                      -5-

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State and tfater Use
Mercury Criteria Values
Alabama.

All

All
Public  Water  Supply
Swimming and Other
Whole Body Water-
Sports
Shellfish  Harvesting
Fish and Wildlife
Not specified

Minimum  conditions  narrative:   State waters shall be
free    from   substances   attributable   to   sewage,
industrial  wastes or other wastes in concentrations or
combinations  which  are  toxic  or  harmful  to human,
animal  or aquatic life to the extent commensurate with
the designated usage of such waters.

       Toxic  substances narrative:  Only such amounts,
whether  alone  or in .combination^wlth Bother substances
as  will  not render the waters unsafe or unsuitable as
a    source   of   water   supply   for   drinking   or
food-processing   purposes,   or   injurious  to  fish,
wildlife  and  aquatic  life,  or  adversely affect the
aesthetic  value  of  waters  for  any  use  under this
classification.

"Toxic substances narrative:  Only such amounts, whether
alone or in combination with other substances or
wastes,   as  will  not  render  the  water  unsafe  or
unsuitable  for  swimming  and water-contact sports; be
injurious   to fish, wildlife and aquatic life or, where
applicable,  shrimp  and crabs5 impair the palatability
of  fish, or where applicable* shrimp and crabs? impair
the  waters  for  any  other usage established for this
classification  or  unreasonably  affect  the aesthetic
value of waters for any use under this classification.

Toxic   substances   narrative:    Only  such  amounts,
whether  alone or in combination with other substances,
as  will  not  be  injurious   to fish and aquatic  life,
including   shrimp  and  crabs; affect  the marketability
of  fish  and  shellfish,   including, shrimp and crabs;
exceed  one-tenth of  the 96-hour median  tolerance  limit
for   fish,  aquatic life or shellfish, including shrimp
and crabs.

Toxic   substances   narrative:    Only  such  amounts,
whether  alone or  in  combination with  other substances,
as  will  not  be   injurious   to  fish  and aquatic  life,
 including   shrimp  and  crabs  in estuarine or salt waters
or   the propagation  thereof;  not  to  exceed  one-tenth  of
 the    96-hour  median   tolerance   limit   for   fish  and
aquatic   life,   including   shrimp  and  crabs  in salt  and
 estuarine    waters,    except    that    other    limiting
 concentrations   may   be used when  factually  justified
 and  approved  by  the  Commission.
                                      -6-

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State and Water Use     Mercury Criteria Values

Agricultural &          Toxic substances narrative:  Only such amounts as will
Industrial              not  render  the  waters  unsuitable  for  agricultural
                        irrigation,  livestock  watering,  industrial  cooling,
                        industrial  process  water  supply  purposes,  and fish
                        survival, nor interfere with downstream water uses.

Industrial Operations   Toxic  substances narrative:  Only such amounts as will
                        not   render   the  waters  unsuitable  for  industrial
                        cooling  and  industrial process water supply purposes,
                        nor interfere with downstream water uses.-

Navigation              Toxic  substances narrative:  Only such amounts as will
                        not  render  the  waters  unsuitable  for  agricultural
                        irrigation,  livestock  watering,  industrial  cooling,
                        and  industrial  process  water  supply purposes, where
                        applicable, nor interfere with downstream water uses.


Alaska2

All                     Not specified

I. Fresh Vater
   (A) Water Supply
       (i) Drinking,    Toxic substances narrative:  Shall not exceed Alaska
Culinary & Food         Drinking Water Standards or EPA  Quality Criteria for
Processing.    .         Vater.
       (ii) Agricultural Toxic  substances narrative:  Same as I.(A)
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State and  Water Use
Mercury Criteria Values  .
       (iv)  Industrial,
Including Any Water
Supplies Used In Asso-
ciation With A Manu-
facturing Or Production
Enterprise  (other  than
Food Processing),  In-
cluding Mining, Placer
Mining, Energy Produc-
tion Or Development.

   (B)  Water Recreation
       (i) Contact
Recreation.

     (ii) Secondary
Recreation

   (C)  Growth And Propa-
gation Of Fish, Shell-
fish,  Other Aquatic
Life,  And Wildlife
Including Waterfowl
And Furbearers
Toxic substances narrative:  Substances shall not be
present which pose hazards to worker contact.
Toxic substances narrative:  Same as I.(A)(i).
II. Marine Water
  (A) Water Supply
      (i) Aquaculture

     (ii) Seafood
Processing
Toxic substances narrative:  Substances.shall not be
present which pose hazards.to incidental human contact.

Toxic substances narrative:  Shall not individually or
in combination exceed 0.01 times the lowest measured
96-hour LC5Q for life stages of species identified by
the department as being the most sensitive,
biologically important to the location, or exceed
criteria  cited  in  EPA  Quality Criteria for Water or
Alaska	Drinking	Water    Standards    whichever
concentration   is  less.    Substances  shall  not  be
present  or exceed concentrations which individually or
in  combination  impart  undesirable  odor  or taste- to
fish  or  other  aquatic  organisms  as  determined  by
either bioassay or organoleptic tests.
Toxic substances narrative:  Same as I.(A)(iii).

Toxic substances narrative:  Shall not exceed EPA
Quality   Criteria  for  Water  as  applicable  to  the
substance.
    (iii) Industrial,   Toxic substances narrative:  Same as I.(A)(iv).
Including Any Water
Supplies Used In Assoc-
iation With A Manu-
facturing Or Production
Enterprise (other than
Food Processing) Includ-
ing Mining, Placer
Mining, Energy Pro-
duction Or Development.
  (B) Water Recreation
      (i) Contact
Recreation
Toxic substances narrative:   Shall not exceed EPA,
Quality Criteria for Water as applicable to
constituent.
                                     -8-

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State and Water Use     Mercury Criteria Values "

      (ii) Secondary    Toxic substances narrative:  Same as I.(B)(ii).
Recreation


  (C) Growth And Propa- Toxic substances narrative:  Same as I.(C).
gation Of Fish, Shell-
fish, Aquatic Life And
Wildlife Including Sea-
birds, Waterfowl And
Furbearers.

  (D) Harvesting For    Toxic substances narrative:  Same as I.(C) but
Consumption Of Raw      excluding the phrase "or Alaska Drinking Water
Hollusks Or Other Raw   Standards."
Aquatic Life                 -~-                     .'...,.         .   ,

       3
Arizona

Domestic & Recreation   0.002 T mg/1 (T=±total residues)

Aquatic Life and        0.0002 T mg/1
Wildlife                *
                           -  The  allowable  limit  for this use is set at  less
                        than  the  current  minimum  level  of  detection.  The
                        limit  necessary  to  adequately  protect  this  use  is
                        lower.    Until  appropriate analytical procedures  with
                        lower  detection  limits are available, this particular
                        limit  is  considered   to  be  violated  only  when the
                        number   herein   listed   is   reached    or   exceeded.
                        Compliance  requires  concentrations  be   less than but
                        not equal  to the number listed.

Agricultural Irrigation Too  little  is  known  about adverse health effects for
                        this use  to adequately  select  a number.

Agricultural Livestock 0.010 T mg/1
Watering

All Effluent            0.0002 mg/1  total
Dominated  Waters

All                    Toxic  substances   narrative:  All  surface waters  shall
                        be  free   from  toxic,   corrosive,  or other  deleterious
                        substances  attributable   to  domestic  or   industrial
                        waste  or  other   controllable  sources at levels  or  in
                         combinations   sufficient   to be  toxic  to  human,  animal,-
                         plant,    or   aquatic  life.    With   respect  to   fish
                         toxicity,   receiving  waters outside mixing  zones  shall
                         not   have  a concentration of  toxic materials exceeding
                         1/10  of   the   96-hour  LC50,  where   the  bioassay  is
                         conducted  using  fish  inhabiting  the  receiving waters
                         and   where   water   quality   conditions(temperature,
                         hardness,    pH,   dissolved  oxygen, etc.)  approximate

                                      -9-

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State and Water Use
Mercury Criteria Values
                         those  of   the  stream or lake as closely as practical.
                         Compliance  shall  be  indicated  when survival of  test
                         group  organisms  is  not less than that of the control
                         group   organisms   exposed  to  an  appropriate  water
                         sample.

                         a.    No  person  shall  cause  toxic  substances to be
                         present   at   concentrations   which   interfere   with
                         designated  protected uses.

                         b.    Compliance with a. (above) shall be determined on
                         a site-specific basis for each discharge.

                         c.    To  determine  compliance  with  this Section and
                         other   water   quality. standards,  and  to  determine
                        -whether- -toxicy*  carcinogenic,  mutagenic, teratogenic,
                         corrosive    or    otherwise   deleterious   substances
                         attributable  to  pollutants', effluent, sewage or waste
                         in   concentrations  or  combinations  which  interfere
                         directly  or  indirectly  with protected uses are being
                         discharged,   the   Department  may  require  chemical,
                         physical,   biological, radiological or other testing by
                         dischargers.
Arkansas

All

All
Not specified

Toxic  materials  shall  not  be  present  in receiving
waters,  after  mixing,  in  such  quantities  as to be
toxic  to  human,  animal,  plant or aquatic life or to
interfere  with  the  normal  propagation,  growth  and
survival  of  the indigenous aquatic biota.  Within the
mixing  zone  there  may  be a zone of initial dilution
which  exceeds  the  acute  toxicity.'    In no instance
shall   the   entire  mixing  zone  be  acutely  toxic.
Compounds   known   to   be   persistent,   cumulative,
carcinogenic  or  to exhibit synergism with other waste
or   stream   components   shall   be  addressed  on  a
case-by-case  basis.  Permitting of all toxic materials
shall  be  in  accordance with the toxic implementation
strategy found in the Continuing Planning Process.
California3

Domestic Water Supply

Ocean Waters only
0.005

0.00014 - 6-month Median

0.00056 - Daily Maximum

0.0014 - Instantaneous Maximum

             -10-

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State and Water Use
Mercury Criteria Values
All
All   waters   shall   be   maintained  free  of  toxic
substances  in  concentrations  that  are  toxic to, or
that  produce  detrimental  physiological  responses in
human,  plant,  animal,  or  aquatic  life.  Compliance
with  this  objective  will  be  determined  by  use of
indicator  organisms,  analyses  of  species diversity,
population  density,  growth  anomalies,  bioassays  of
appropriate  duration  or  other appropriate methods as
specified by the Regional Board.

The   survival   of  aquatic  life  in  surface  waters
subjected  to  a waste discharge, or other controllable
water  quality factors, shall not be less than that for
the  same  water  body in areas unaffected by the waste
discharge,  or  when  necessary for other control water
that   is   consistent   with   the   requirements  for
"experimental  water" as described in "Standard Methods
for  the  Examination  of Water and Wastewater", latest
edition.   As a minimum, compliance with this objective
as  stated  in the previous sentence shall be evaluated
with a 96-hour bioassay.

In   addition,   effluent   limits   based  upon  acute
bioassays   of   effluents  will  be  prescribed  where
appropriate,   additional   numerical  receiving  water
objectives  for  specific toxicants will be established
as   sufficient   data  become  available,  and  source
control of toxic substances will be encouraged.
Colorado

Aquatic Life (1)(3)(4)  Acute = 2.4 ug/1
                        Chronic « 0.1 ug/1
                        FRV(fish) s 0.01 ug/1
Drinking Water Supply
(2)
FRV  means  final residual value.  This value, based on
the  maximum allowed concentration of a material in the
water    that    can   affect   marketability   through
bioaccumulation  or  bioconcentration, is to be applied
as   a   30-   day  average  in  all  water  supporting
populations  of. fish or shellfish with a potential for
human consumption.

2.0 ug/1  1-day avg.    .
All
Except  where  authorized by permits, BMP's or plans of
operation  approved by the Division, State waters shall
be  free  from  substances attributable to human-caused
point  source or nonpoint source discharges in amounts,
concentrations  or  combinations  which  are harmful to

             -11-

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State and Vater Use     Mercury Criteria Values
Connecticut
                        beneficial  uses  or  toxic to humans, animals, plants,
                        or aquatic life.

                        Footnotes:
                        (1)   Metals   for  aquatic  life  use  are  stated  as
                        dissolved unless otherwise specified.

                        (2)  Metals  for  agriculture  and  domestic  uses  are
                        stated as total recoverable unless otherwise specified.

                        (3)  Hardness  values  to  be  used in equations are in
                        mg/1  as  calcium  carbonate.  The hardness values used
                        in  calculating  the  appropriate metal standard should
                        be  based  on the lover 95 per cent confidence limit of
                        the  mean  hardness  value  at  the  periodic  low flow
                        criteria  as  determined  from a regression analysis of
                        site-specific  data.   where insufficient site-specific
                        data  exists  to  define the mean hardness value at the
                        periodic  low  flow  criteria,  representative regional
                        data  shall be used to perform the regression analysis.
                        where  a  regression  analysis  is  not  appropriate, a
                        site-specific  method should be used.  In calculating a
                        hardness  value,  regression  analyses  should  not  be
                        extrapolated past the point that data exist.

                        (4)  Both  acute  and chronic numbers adopted as stream
                        standards  are levels not to be exceeded more than once
                        every three years on the average.
All                     Not specified

All                     Toxic  substances  narrative:   General Policy 11.  The
                        waters  shall  be  free  from  chemical constituents  in
                        concentrations  or  combinations which would be harmful
                        to   human,   animal  or  aquatic  life  for  the  most
                        sensitive  and  governing water use class. Criteria for
                        chemical    constituents    contained   in   guidelines
                        published  by  the U.S. Environmental Protection Agency
                        shall  be considered.  In areas where fisheries are the
                        governing  consideration  and numerical limits have not
                        been   established,   bioassays  may  be  necessary   to
                        establish    limits   on    toxic   substances.      The
                        recommendations  for  bioassay  procedures contained  in
                        "Standard  Methods  for  the  Examination  of Water arid
                        Wastewater"  and  the  application factors contained  in
                        EPA water quality guidelines shall be considered.
                             For  surface  waters classified as public drinking
                        water,  the  raw  water sources must be maintained at a
                        quality  as  defined  by criteria developed by the U.S.
                        EPA  in  accordance  with   the  Safe Drinking Water Act
                        (P.A.  93-523)  or  the  State  of Connecticut (Section

                                     -12-

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State and eater Use
                        Mercury Criteria Values
Coastal And Marine
Water Uses
(Clases SA, SB, & SC)
                        19-13-B102  of  the  Regulations  of  Connecticut State
                        Agencies),   whichever   is  more  stringent,  so  that
                        criteria   for   finished   water   can  be  met  after
                        conventional treatment.

                        Toxic substances narrative:  None in concentrations
                        or combinations which would be harmful to human,
                        animal  or  aquatic life or which would make the waters
                        unsafe  or  unsuitable  for  fish or shellfish or their
                        propagation,   impair  the  palatability  of  same,  or
                        impair  the  waters  for  any  other uses. (See General
                        Policy 11. above)
        8
Delaware

All                     Not specified
                       «

General Stream          Toxic substances narrative:  All surface waters of the
Criteria                State  shall  be  free  from substances attributable to
                        wastes  of industrial, municipal, agricultural or other
                        anthropogenic   origin,   such   as   any   pollutants,
                        including  those  of a toxic nature, that may interfere
                        with  attainment  of  designated  uses  of  the  water,
                        impart  undesirable  odors,  tastes,  or  colors to the
                        water  or  to  aquatic .life  found  therein,  endanger
                        public  health,  or  result  in  dominance  of nuisance
                        species.

Stream Quality Criteria Toxic substances narrative:  None in concentrations
(General Criteria For   that may interfere with attainment of designated uses
                        of the water, endanger public health, or result in
                        dominance  of  nuisance  species.    The  following EPA
                        publications,  or  any  other sources deemed acceptable
                        by  the  Department,  may  be  used  as  guidelines for
                        applying these Standards to discharges in the State:

                        (1) Water Quality Criteria 1972 (March, 1973),

                        (2) Quality Criteria For Water (July, 1976),

                        (3)      Water      Quality     Criteria     Documents,
                        (EPA-440/5-80-015 through 5-80-079), published in 1980,
Freshwater and Salt-
water Streams)
                        (4)      Water
                        (EPA-440/5-84-028
                        published in 1985.
                                            Quality     Criteria     Documents,
                                            through  5-84-033,  and  5-85-001),
Public Water Supply
                        Waters  shall  be  free from substances (except natural
                        impurities)  that,  alone  or in combination with other
                        substances,   result   in   concentrations   of   toxic
                        substances  in the treated water that may be harmful to
                        human   health.      The  EPA  Water  Quality  Criteria
                        Documents,    (EPA-440/5-80-015    through    5-80-079)
                                     -13-

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State and Water Use
Mercury Criteria Values
ERES Waters
published  in  1980, (or other sources as determined by
the  Department)  shall  be  used  as guidelines in the
determination of acceptable concentrations.

Toxic  substances  narrative:  Shall not exceed natural
levels.
(ERES   =   Exceptional   Recreational   or  Ecological
Significance)
Florida7

Potable Water Supply
(Class I)
0.2 ug/1
Shellfish* Propagation   0.1 ug/1
or Harvesting ^(Class II)

Recreation-Propagation  0.1 ug/1 in predominantly marine waters
and Management of Fish  0.2 ug/1 in predominantly fresh waters
and Wildlife (Class III)
Agricultural Supply
(Class IV)

Navigation, Utility
and Industrial Use
(Class V)

All
All
0.2 ug/1
0.2 ug/1
Minimum   criteria  .for  surface  waters:  All  surface
waters  of  the. State shall at all times at all places
be free from:

Domestic,    industrial,    agricultural,    or   other
man-induced   non-thermal   components   of  discharges
which,  alone  or  in combination with other substances
or  in  combination with other components of discharges
(whether thermal or non-thermal);

     Are acutely toxic; or

     Are    present   in   concentrations   which   are
     carcinogenic,  mutagenic,  or teratogenic to human
     beings   or  to  significant,  locally  occurring,
     wildlife or aquatic species; or

     Pose  a  serious  danger  to  the   public  health,
     safety, or welfare.

General  criteria  for toxic substances  (applied to all
surface   waters   except   within  zones  of  mixing);
Substances   in   concentrations   which  injure,  are
chronically  toxic to, or produce adverse physiological
or  behavioral  response in humans, animals, or plants  -
                                      -14-

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State and ¥ater Use     Mercury Criteria Values

                         none  shall  be  present.


Georgia

AH                      Instream concentrations  shall  not  exceed  0.2  ug/1
                         except  within  established mixing zones.

AH                      Toxic,  substances  narrative:  All waters shall be free
                         from  toxic substances discharged from municipalities,
                         industries  or other sources in amounts, concentrations
                         or  combinations  which  are harmful to humans, animals
                         or aquatic  life.

Drinking Water  Supplies  Toxic  substances  narrative:  No material or substance
                         in  such concentration  that,  after  treatment, would
                         exceed    the    requirements   of   the   Environmental
                         Protection  Division  and the latest edition of Federal
                         Drinking Water Standards.

Recreation, Fishing,     Toxic wastes narrative:'  None in concentrations that
Propagation Of  Fish,     would harm  man,  fish and game or other beneficial
Shellfish, Game And      aquatic life.
Other Aquatic Life

Agricultural             Toxic  substance  narrative:    None  in concentrations
                         that  would interfere with or adversely affect uses for
                         general agricultural  purposes  or  would prevent fish
                         survival.

Industrial               Toxic  substance  narrative:    None  in concentrations
                         that  would prevent  fish  survival  or interfere with
                         legitimate  and beneficial industrial uses.

Navigation               Toxic  substance  narrative:    None  in concentrations
                         that  would damage  vessels,  prevent fish survival or
                         otherwise interfere with commercial navigation.


Hawaii11

All                      Not specified

AH                      Toxic  substances  narrative:  All waters shall be free
                         of  substances attributable tp domestic, industrial, or
                         other   controllable   sources   as   follows:    toxic
                         substances  at  levels or combinations sufficient to be
                         toxic  or   harmful  to  human, animal,  plant or aquatic
                         life  or  in  amounts  sufficient to interfere with any
                         beneficial  use of the water.

        .                 As  a  minimum,  a  phytoplankton  bioassay  test  or a
                         96-hour  bioassay  shall be required.   Survival of test
                         organisms   shall  not  be  less  than  that in controls

                                     -15- .

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State and Vater Use
Mercury Criteria Values

which utilize appropriate experimental water.
Idaho
     12
All                     Not specified

Domestic Water Supply   Max. allowable concentration - 0.002 mg/1

                        The  following  general  water  quality  standards will
                        apply    to  waters  of  the  State,  both  surface  and
                        underground,   in   addition   to   the  water  quality
                        standards   set   forth   for  specifically  classified
                        waters.    As  a result of man-caused point or nonpoint
                        source   discharge,   waters  of   the  State  must  not
                        contain:

                         .01  Hazardous  Materials; (see Section 01-2003,19.)  in
                        concentrations   found    to   be    of   public   health
                        significance  or  to  adversely  affect  designated   or
                        protected  beneficial  uses.

                         .02  Deleterious  Materials;   (see Section 01-2003,07.)
                         in  concentrations   that  impair designated or protected
                         beneficial uses without being  hazardous.
 Illinois13

 General Use
 0.0005 mg/1
 Toxic substances narrative;    Any  substance • toxic  to
 aquatic  life shall not exceed one-tenth of the 96-hour
 median  tolerance limit (96-hr. TL ) for native fish or
 essential   fish   food  organisms,  except  for  USEPA
 registered  pesticides approved for aquatic application
 and applied pursuant to specified conditions.
 Secondary Contact and   0.0005 mg/1
 Indigenous Aquatic Life
 Effluent Standards
                         Section 304.126
                         (a)  Except as provided below, ho person shall cause or
                         allow  the  concentration of mercury in any effluent to
                         exceed  the  following  level, subject to the averaging
                         rule contained in Section 304.104(a):

                         0.0005 mg/1

                         (b)  It   shall  be an exception  to paragraph  (a)  if all
                         of  the following conditions are  met:
                                       -16-

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State and Water Use     Mercury Criteria Values
                             1)   The  discharger does not use mercury; or, the
                                  discharger  uses  mercury and this use cannot
                                  be   eliminated;   or,  the  discharger  uses
                                  mercury  only  in  chemical  analysis  or  in
                                  laboratory   or  other  equipment  and  takes
                                  reasonable  care  to  avoid  contamination of
                                  vastevater; and

                             2)   The  effluent  mercury  concentration is less
                                  than    0.003    mg/1,   as   determined   by
                                  application   of   the   averaging  rules  of
                                  Section 304.104(a); and

                             3)   The  discharger  is providing the best degree
                                  of  treatment  consistent  with technological
                                  feasibility,   economic   reasonableness  .and
                                  sound   engineering   judgment.     This  may
                                  include no treatment for mercury; and

                             4)   The   discharger   has   an   inspection  and
                                  maintenance   program  likely  to  reduce  or
                                  prevent  and increase in the level of mercury
                                  discharges..

                        (c)  It  shall  be an exception to paragraph (a) if all
                        the following conditions are met:

                             1) .  The   discharger   is  a  publicly  owned  or
                                  publicly  regulated  sewage  treatment works;
                                  and

                             2)   The  discharger does not use mercury; or, the
                                  discharger  uses  mercury  only  in  chemical
                                  analysis  or in laboratory or other equipment
                                  and    takes   reasonable   care   to   avoid
                                  contamination of wastewater; and

                             3)   The  effluent  mercury  concentration is less
                                  than    0.003    mg/1,   as   determined   by
                                  application   of   the  "averaging  rules  of
                                  Section  304.104(a);  provided, however, that
                                  daily  averages  may exceed 0.006 mg/1 30% of
                                  the time; and

                             4)   The  discharger has enforceable ordinances or
                                  contract  provisions whereby it limits use of
                                  mercury   by  dischargers  and  discharge  of
                                  mercury into its sewage system; and

                             5)   The   discharger's  limitations  on  use  and
                                  discharge  of  mercury  to  its sewage system
                                  are  at  least as stringent as those provided
                                  in Section 307.103; and
                                     -17-

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State and Water Use     Mercury Criteria Values

                             6)   The  discharger  has  a  surveillance program
                                  with  a  reasonable likelihood of determining
                                  sources  of  mercury discharged to the sewage
                                  system; and

                             7)   The  discharger  takes  all  lawful  steps to
                                  eliminate  known  mercury  discharges  to the
                                  sewage  system  which  contribute  levels  in
                                  excess  of  those allowed by Section 307.103;
                                  and

                             8)   The  discharger  reports all known violations
                                  of Section 307.103 to the Agency.

                        (d)  For  purposes  of  permit  issuance the Agency may
                        consider  application of the exceptions of this section
                        to  determine compliance with this section.  The Agency
                        may  impose  permit conditions necessary or required to
                        assure  continued  application  of  an exception.  When
                        paragraph   (b)  applies,  the  Agency  may  impose  an
                        effluent   limitation   in   the  permit  which  allows
                        discharge  of  a  concentration of mercury greater than
                        0.0005 mg/1 but not more than 0.003 mg/1.

Sewer Discharge         Section 307.103
Criteria                (a)  Except as provided below, no person shall cause or
                        allow  the concentration of mercury in any discharge to
                        a  publicly owned or publicly regulated sewer system to
                       • exceed  the  following  level, subject to the averaging    Jilt
                        rule contained in 35 111. Adm. Code 304.104(a)s            'HP

                       . 0.0005 mg/1               >

                        (b)  It  shall   be an exception  to paragraph  (a)  if  the
                        discharge  is  to a publicly owned or  publicly  regulated
                        sewer  system  which  is   required to meet a  limitation
                        less   stringent   than    the    0.0005   mg/1    mercury
                        concentration  in  which   case  the discharge  limitation
                        shall  be   the   same as  that applicable  to  the publicly
                        owned  or regulated sewer-system  to which it discharges.

                         (c)  It  shall   be an exception  to paragraph  (a) if  all
                        of the following conditions are  met:

                              1)    The  discharger  does  not use  mercury;  or,  the
                                   discharger  uses mercury  and this  use cannot
                                   be  eliminated;    or,   the  discharger  uses
                                   mercury  only  in  chemical  analysis   or  in
                                   laboratory    or   other  equipment   and  takes
                                   reasonable   care  to   avoid  contamination of
                                   wastewater;  and,  .

                              2)    The  discharge  mercury concentration  is less
                                   than    0.003    mg/1,   as   determined   by

                                      -18-

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State and Water Use     Mercury Criteria Values
                                  application  of  the  averaging  rules  of 35
                                  111. Adm. Code 304.104(a); and,

                             3)   The  discharger  is providing the best degree
                                  of  treatment  consistent  with technological
                                  feasibility,   economic   reasonableness  and
                                  sound   engineering   judgment.     This  may
                                  include no treatment for mercury; and,

                             4)   The   discharger   has   an   inspection  and
                                •  maintenance   program  likely  to  reduce  or
                                  prevent  and increase in the level of mercury
                                  discharges.

                        (d)   The   discharge   of  wastes  from  medicinal  or
                        therapeutic  use  of  mercury,  exclusive of laboratory
                        use,  shall be exempt from the limitations of paragraph
                        (a)  of this section if all of the following conditions
                        are met:

                             1)   The  total  plant discharge is less than 227g
                                  (one half pound) as Hg in any year;

                             2)   The  discharge  is  to a public sewer system;
                                  and

                             3)   The   discharge   does   not,   alone  or  in
                                  conjunction  with  other  sources,  cause the
                                  effluent  from  the sewer system or treatment
                                  plant to exceed 0.0005 mg/1 of mercury;

                        (e)  No  person  shall  cause or allow any discharge of
                        mercury  to  a  publicly  owned  or  publicly regulated
                        sewer  system which, alone or in combination with other
                        sources,   causes   a   violation   by  the  wastewater
                        treatment   plant   discharge   of  the  water  quality
                        standard  of  Part  302  for  mercury applicable in the
                        receiving stream.

                        (f)  For  purposes  of  permit  issuance the Agency may
                        consider  application of the exception of paragraph (b)
                        or  (c) to determine compliance with this Section.  The
                        Agency   may  impose  permit  conditions  necessary  or
                        required   to   assure  continued  application  of  the
                        exception.    When  paragraph  (b)  or (c) applies, the
                        Agency  may impose an effluent limitation in the permit
                        which  allows  the  discharge  of  a  concentration  of
                        mercury  greater  than  0.0005  mg/1  but not more than
                        0.003 mg/1.
                                     -19-

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State and Water Use
       1A
Indiana1^

All

All
Aquatic Life
 Potable Supply
Mercury Criteria Values
Not specified

Toxic  substances  narrative:   All waters at all times
and  at  all  places, including the mixing zone , shall
meet   the   minimum  conditions  of  being  free  from
substances   attributable   to  municipal,  industrial,
agricultural,  and  other  land  use practices or other
discharges  which  are in amounts sufficient to injure,
be  acutely  toxic  to  or  otherwise  produce  serious
adverse  physiological  responses  in  humans, animals,
aquatic   life  or  plants.    As  a  guideline,  toxic
substances  should  be  limited  to  the 96-hour median
lethal  concentration  (LC50)  for biota significant to
the    indigenous    aquatic    community    or   other
representative  organisms.    This subsection shall not
apply  to  the  chemical  control  of aquatic plants or
animals  when  that  control  is subject to approval by
the   Indiana   Department   of  Natural  Resources  as
provided  by  the  Fish  and  Wildlife  Act  (1C  1971,
14-2-1).

At  all times, all waters outside of mixing zones shall
be  free  of  substances in  concentrations which on the
basis  of  available scientific data are believed to be
sufficient   to  injure,  be  chronically toxic  to, or be
carcinogenic,  mutagenic,,  or  teratogenic  to  humans,
animals, aquatic life, or plants.
These   standards  are   applicable  at
waters  outside  of the mixing  zone:
any point in the
                         Toxic  substances  narrative:   Concentrations shall not
                         exceed   one-tenth   of   the    96-hour  median  lethal
                         concentration  for important indigenous aquatic species
                         or other representative organisms.

                         Contaminants  which are known  to be bioaccumulative and
                         toxic,  on  the  basis  of  available  scientific data,
                         shall  not  be  present  in  concentrations which would
                         re.sult  in  the  bioaccumulatipn or bioconcentration of
                         such  contaminants  or  their   degradation  products in
                         important  indigenous  aquatic  species to Federal Food
                         and   Drug   Administration  action  levels  or  levels
                         producing  deleterious effects prohibited in subsection
                         (a).
 Chemical    substances   narrative:       The   chemical
 constituents  in  the waters shall not be present after
 conventional  treatment  in  such  levels as to prevent
 meeting  the  Drinking  Water  Standards adopted by the
 Board.
                                      -20-

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State and ¥ater Use

Ohio River Main Stem
and the Interstate
Portion Of The Vabash
River

Lake Michigan and Con-
tiguous Harbor Areas
                        Mercury Criteria Values

                        0.2 ug/1




                        Not to exceed 0.05 ug/1 at any time

                        Toxic  substances  narrative:  Concentrations shall not
                        exceed   one-tenth   of   the   96-hour  median  lethal
                        concentration  (LC^)  for important indigenous aquatic
                        species   and  those  artificially  propagated  by  the
                        Indiana   Department   of   Natural  Resources.    More
                        stringent   application  factors  shall  be  used  when
                        justified  on  the  basis  of  available  evidence  and
                        approved   by   the   Board  after  public  notice  and
                        opportunity for a hearing.

                        Concentrations  of  organic  contaminants  which can be
                        demonstrated  to  be  persistent, to have a tendency to
                        bioconcentrate  in the aquatic biota, and are likely to
                        be   toxic   on   the  basis -of  available  scientific
                        evidence,   shall  be  limited  as  determined  by  the
                        Commissioner  after  public  notice  and an opportunity
                        for a hearing.

                        0.5 ug/1
                        Toxic  substances  narrative:  Concentrations shall not
                        exceed   one-tenth   of   the   96-hour  median  lethal
                        concentration  (LCc/j)  for important indigenous aquatic
                        species.    More stringent application factors shall be
                        used,   when  justified,  on  the  basis, of  available
                        scientific  evidence  and  approved  by the Board after
                        public notice and opportunity for a hearing.

                        Organic  contaminants  which  can be demonstrated to be
                        persistent,  to  have  a  tendency to bioconcentrate in
                        the  aquatic  biota,  and are likely to be toxic on the
                        basis  of  available  scientific evidence, shall not be
                        present  in  concentrations  which  would result in the
                        bioaccumulation"or    bioconcentration   -of"   such
                        contaminants   or   their   degradation   products   in
                        important  indigenous  aquatic  species to Federal Food
                        and  Drug  Administration action levels or levels which
                        on  the  basis  of  available  scientific  evidence are
                        believed  to  be  sufficient  to injure, be chronically
                        toxic   to,   or   be   carcinogenic,   mutagenic,   or
                        teratogenic to humans, animals, or plants.

Natural Spawning, Rear- 4.1 ug/1 maximum concentration
ing or Imprinting Areas;
Migration Routes for    0.2 ug/1 24-hr, average concentration
Salmonid Fishes
                                     -21-
Grand Calumet River;
Indiana Harbor

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State and Water Use
Mercury Criteria Values
leva15

Wildlife, Fish, Aquatic 0.05 ug/1
And Semiaquatic Life,
Secondary Contact       Toxic substances narrative:  All substances toxic or
(Class B)               detrimental   to  aquatic  life  shall  be  limited  to
                        non-toxic  or non-detrimental concentrations in surface
                        water.
Potable Vater Supply
(Class C)
All
0.002 mg/1
Toxic  substances  narrative:   All substances toxic to
humans  or  detrimental  to  treatment process shall be
limited  to non-toxic or non-detrimental concentrations
in the surface water.

Toxic  substances narrative:  All waters, at all times,
at   all   places   shall   be   free  from  substances
attributable  to  wastewater discharges or agricultural
practices  in  concentrations or combinations which are
toxic or harmful to human, animal, or plant life.
Kansas

All

All
      16
Aquatic Life
Not specified

General  criteria:    All surface waters shall be free,
at  all  times,  from the harmful effects of substances
that   originate   from  artificial  sources  and  that,
produce   any   public   health   hazards  or  nuisance
conditions,   or  impairment  of  uses.    The  harmful
effects   may   result  from  any  concentration  of  a
substance   that  causes  toxic  effects,  alone  or  in
combination   with   other   artificial   or   natural
substances.    Such  substances  shall  be  limited  to
concentrations  in the receiving water  that will not be
harmful  to  human, animal, or plant life.

Toxic  substances narrative:
(ii) The" Waters  of  the state shall not be toxic as a
result  of   the  effects of substances  originating from
artificial   sources,  whether  alone  or in combination
with other  artificial or natural substances.

(iii)  Criteria  for  the  protection   of predators, in
terms  of   toxic  levels  ,in  fish, published  in  "Water
Quality  Criteria"   (National  Academy  of Engineering,
1973),  which  is hereby adopted by reference,  shall be
used   as   guidelines  in  assessing   toxicity due  to
bioaccumulation.

(iv)   When   criteria  for single compounds have not been
published   or  are  incomplete, or when  complex mixtures
can   result  in  interactions  among   substances,   the

             -22-

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State and Water Use
Mercury Criteria Values
Domestic Water Supply
Consumptive Recreation
department   shall   utilize   laboratory   and   field
bioassessment   methods  and  procedures  to  establish
site-specific water quality criteria.

Any   concentration  of  a  substance  from  artificial
sources  that,  alone  or  in  combination  with  other
artificial  or natural substances, causes toxic effects
on  ;  humans    shall   be   limited   to   non-harmful
concen t ra t i ons.

Substances     that     can    bioaccumulate    through
bioconcentration  or  biomagnification  to toxic levels
in  aquatic life, semiaquatic life or wildlife consumed
by  humans  shall  be  limited  in  surface  waters  to
concentrations  that  will  result in no harm to humans
upon  consumption.  FDA action levels defined in K.A.R.
28-16-28b(b)(19)  for  toxic  substances in fish flesh,
which  are  hereby  adopted by reference, shall be used
as guidelines to determine protection of this use.
        17
Kentucky

All
Warmwater Aquatic
Habitat, Coldwater
Aquatic Habitat
Domestic Water  Supply

Mixing Zones
Surface  waters shall not be aesthetically or otherwise
degraded  by  substances  that  injure,  be toxic to or
produce  adverse  physiological or behavioral responses
in humans, animals, fish, and other aquatic life.

Toxic substances narrative:
1. The allowable instream concentration of toxic
substances  which  are  noncumulative  or nonpersistent
(half-life  of less than 96 hours) shall not exceed 0.1
of  the 96-hour median lethal concentration (LC5Q) of a
representative indigenous aquatic organism(s).
2.   The  allowable  instream  concentration  of  toxic
substances  which  are  bio-accumulative or persistent,
including  pesticides,  when not specified elsewhere in
this  section,  shall  not  exceed  0.01 of the 96-hour
median  lethal concentration (LC^n) of a representative
indigenous aquatic organism(s).

3~.   Where   specific  application  factors  have  been
determined   for   a   toxic   substance   such  as  an
acute/chronic  ratio or water effect ratio, they may be
used  instead  of  the  0.1  and 0.01 factors listed in
this subsection upon approval by the cabinet.

4. 0.05 ug/1

0.002 mg/1

Toxic  substances  narrative:   Concentrations of toxic
substances  which  exceed the ninety-six (96) hour LC50
                                      -23-

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State and ¥ater Use     Mercury Criteria Values
                        tests  for  representative indigenous aquatic organisms
                        are  not  allowed  at any point within the mixing zone.
                        A  zone  of  initial  dilution  may  be  cissigned  on a
                        case-by-case  basis  at  the discretion of. the cabinet.
                        Concentrations   of   toxic   substances  which  exceed
                        one-third  (1/3) the ninety-six (96) hour LC50 or other
                        appropriate  LC50  tests  for representative indigenous
                        aquatic  organisms  are  to  be  met at the edge of the
                        zone  of  initial  dilution.   Chronic criteria for the
                        protection  of  aquatic  life are to be met at the edge
                        of the allowable mixing zone.
         18
Louisiana
All                     Not specified
                        General  criteria  narrative:  All waters shall be free
                        from  such concentrations of substances attributable to
                        wastewater  or  other  discharges sufficient to injure,
                        be  toxic or produce demonstrated adverse physiological
                        response   in   humans,   animals,   fish,   shellfish,
                        wildlife, or plants.

                        Toxic  substances  narrative:   Shall riot be present in
                        quantities  that  alone or in combination will be  toxic
                        to  plant or animal life.  Concentrations, of persistent
                        toxic  substances  for  which no numerical criteria are
                        given  in  the  Standards  shall not, exceed the 96-hour
                        LC50/100   (one-hundredth   of   the   96-hour   LC50).
                        Persistent  toxic  substances  are  defined  herein  as
                        refractory  substances  subject  to  very limited  or no
                        biodegradation  and/or  detoxification  and  subject to
                        food  chain  bioaccumulation;  they include but are not
                        limited  to pesticides, PCB's and heavy metals that are
                        designated    by    EPA    as    priority   pollutants.
                        Concentrations  of  non-persistent, biodegradable  toxic
                        substances  for  which  no numerical criteria are  given
                        in  the standards, shall not exceed  the 96-hour LC50/10
                        (one-tenth  of  the 96-hour LC50).  Bioassay techniques
                        comparable  with   those  given in the latest edition of
                        Standards  Methods  for  the  Examination  of Water and
                        Wastewater  will   be  used in evaluating toxicity  using
                        specific  methods,  dilutions,  and  species of aquatic
                        animals best suited to  the area of concern.
Maine19
All                      Not specified

All                      There  shall  be no disposal of any matter or substance
                         that  contains  chemical constituents which are harmful
                         to  humans,   animals or aquatic life or which adversely

                                      -24-

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State and Water Use     Mercury Criteria Values

                        affect any other water use in the classes.

Classes B-l, B-2, C,    There shall be no disposal of sewage, industrial
D» SD                   wastes  or  other  wasted  in such waters, except  those
                        which  have received  treatment for the adequate removal
                        of  waste  constituents  including, but not limited  to,
                        solids,   color,   turbidity,   taste,  odor  or   toxic
                        material,  such  that  these  treated  wastes  will  not
                        lower  the  standards  or  alter  the  usages  of  these
                        classifications,  nor  shall such disposal of sewage or
                        waste  be  injurious  to  aquatic  life  or render such
                        dangerous for human consumption.

Classes SA, SB-1,       There shall be no toxic wastes, deleterious
SB-2, SC                substances,  colored  or  other waste or heated liquids
                        discharged  to  waters  of these classifications either
                        singly  or  in  combinations  with  other substances or
                        wastes  in  such  amounts or at such temperatures as to
                        be  injurious  to  edible  fish  or shellfish or to  the
                        culture  or propagation thereof, or which in any manner
                        shall  adversely  affect  the  flavor,  color,  odor or
                        sanitary  condition   thereof;  and  otherwise  none  in
                        sufficient   amounts  to  make  the  waters  unsafe  or
                        unsuitable  for  bathing  or  impair the waters for  any
                        other  best usage as determined for the specific waters
                        which are assigned to these classes.

All                     No  person,  firm,  corporation  or  other legal entity
                        shall  place,  deposit, discharge or spill, directly or
                        indirectly,  onto  the  inland  or tidal waters of this
                        State,  or  on the ice thereof, or on the banks thereof
                        so  that  the  same  may  flow  or  be washed into such
                        waters,  or  in such manner that the drainage therefrom
                        may  flow  into  such  waters,  any  of  the  following
                        substances:                                 .

                        (1)  Mercury  narrative:,	Mercury,  and  any compound
                        containing  mercury,  whether  organic or inorganic, in
                        any   concentration   which   increases   the   natural
   --—:                  concentration of mercury in the receiving waters.

                             (A)  Exception.   Any person, firm, corporation or
                        other  legal  entity  who,  on  January  1,  1971,   was
                        discharging  any  of  the  substances mentioned in this
                        subsection  in  connection  with  an industrial process
                        shall  not be deemed in violation of this subsection if
                        on  or  before December 31, 1971 it shall file with  the
                        Board   a  statement  indicating  the  amount  of  such
                        substance so discharged on that date.

                             (B)   Emergency   prohibitions.    Notwithstanding
                        paragraph  A,  whenever  the  board  shall  find that a
                        concentration  of  10  parts  per billion of mercury or
                        greater  is  present  in  any  waters of this State, or

                                     -25- '••••••              '      •••'•'•-.

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State and Vater Use
Mercury Criteria Values
                        that  danger  to  public  health  exists due to mercury
                        concentrations  of  less  than  10 parts per billion in
                        any  waters  of  this  State, it may issue an emergency
                        order   to  all  persons  discharging  to  such  waters
                        prohibiting  or  curtailing  the  further  discharge of
                        mercury,  and  compounds  containing  mercury, thereto.
                        Such  findings  and  order  shall  be  served in manner
                        similar  to  that  described in section 347, subsection
                        2,  and  the  parties affected by such order shall have
                        the  same  rights and duties with respect thereto as is
                        described in section 347, subsection 2.

                        (2)  Toxic  substances  narrative:    Any  other  toxic
                        substance  in  any amount or concentration greater than
                        that   identified   or  regulated,  including  complete
                        prohibition  of  such  substance,  .by  the  board.   In
                        identifying  and  regulating such toxic substances, the
                        board  shall  take  into  account  the  toxicity of the
                        substance,   its  persistence  and  degradability,  the
                        usual  or  potential  presence of any organism affected
                        by  such  substance  in  any  waters  of the State, the
                        importance  of  such organism and the nature and extent
                        of  the  effect  of  such  substance on such organisms,
                        either  alone or in combination with substances already
                        in the receiving waters or the discharge.
Maryland

All

All
        20
Not specified

Toxic  substances  narrative:  The waters of this State
may   not   be  polluted  by  high-temperature,  toxic,
corrosive,     or    other    deleterious    substances
attributable  to  sewage,  industrial  waste,  or other
.waste in concentrations or combinations which:

(a)  interfere  directly or indirectly with water uses;
                         (b)  are  harmful   to  human,  animal, plant or aquatic
                             life.

                         Toxic  materials   criteria  are  established to protect
                         freshwater   aquatic life,  saltwater  aquatic  life  or
                         human health.
Hassachusetts2

All
Not  specified

For   each  class,  the  most  sensitive  beneficial  uses  are
identified  and   minimum  criteria for water  quality in
                                      -26-

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State and Water Use     Mercury Criteria Values

                        the  water column are established.  In interpreting and
                        applying  the  minimum criteria in 314 CMR 4.03(4), the
                        Division  shall  consider  local  conditions including,
                        but not limited to:

                        (a)  the characteristics of the biological community;

                        (b)  temperature,   weather,  flow,  and  physical  and
                             chemical characteristics; and

                        (c)  synergistic    and    antagonistic    effects   of
                             combinations of pollutants.

                        The  Division  will  use  the  EPA criteria established
                        pursuant  to  Section  304(a)(l) of the Federal Act, as
                        guidance  in establishing case-by-case discharge limits
                        for   pollutants   not  specifically  listed  in  these
                        standards   but   included  under  the  heading  "Other
                        Constituents"  in  310  CMR  4.03(4),  for  identifying
                        bioassay  application  factors  and for interpretations
                        of  narrative  criteria.    Where  the minimum criteria
                        specifically  listed  by  the  Division  in  this  part
                        differ  from  those  contained in the federal criteria,
                        the  provisions  of the specifically listed criteria in
                        these standards shall apply.

All                     Toxic  substances narrative:  Waters shall be free from
                        pollutants in  concentrations or combinations that:  '

                        (a)  exceed   the   recommended   .limits  on  the  most
                             sensitive receiving water use;

                        (b)  injure,   are   toxic   to,   or  produce  adverse
                             physiological  or  behavioral  responses in humans
                             or aquatic life; or

                        (c)  exceed    site-specific   safe   exposure   levels
                             determined by bioassay using sensitive species.


Michigan22

All                     Not specified

All                     R 323.1057 Toxic substances narrative: Rule 57.

                        (1)  Toxic  substances  shall  not  be  present  in the
                        waters  of  the state at levels which are or may become
                        injurious  to  the  public  health, safety, or welfare;
                        plant  and animal life; or the designated uses of those
                        waters.   Allowable levels of toxic substances shall be
                        determined   by   the   commission   using  appropriate
                        scientific data.
                                     -27-

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State and ffater Use     Mercury Criteria Values
                        (2)  All of the following provisions apply for purposes
                        of  developing  allowable levels of toxic substances in
                        the  surface  waters  of  the state applicable to point
                        source  discharge  permits  issued  pursuant to Act No.
                        245  of  the  Public  Acts  of  1929, as amended, being
                        §323.1 et seq. of the Michigan Compiled Laws:

                             (a)  Water quality-based effluent limits developed
                        pursuant  to  this subrule shall be used only when they
                        are  more restrictive than technology-based limitations
                        required pursuant to R 323.2137 and R 323.2140.

                             (b)  The  toxic  substances  to which this subrule
                        shall  apply  are  those  on the 1984 Michigan critical
                        materials  register established pursuant to Act No. 245
                        of  the  Public  Acts of 1929, as amended, being §323.1
                        et  seq.  of  the  Michigan Compiled Laws; the priority
                        pollutants   and   hazardous  chemicals  in  40  C.F.R.
                        §122.21,   appendix  D  (1983);  and  any  other  toxic
                        substances  as  the  commission  may  determine  are of
                        concern at a specific site.

                             (c)  Allowable  levels  of toxic substances in the
                        surface  water  after  a  discharge  is  mixed with the
                        receiving  stream  volume specified in R 323.1082 shall
                        be  determined by applying an adequate margin of safety
                        to  the  MATC,  NOAEL,  or other appropriate effect end
                        points,  'based  on  knowledge  of  the  behavior of the
                        toxic   substance,  characteristics  of  the  receiving
                        water, and the organisms, to be protected.

                             (d)   In  addition  to  restrictions  pursuant  to
                        subdivision   (c)  of  this  subrule,  a  discharge  of
                        carcinogens,  not  determined  to  cause  cancer  by   a
                        threshold  mechanism,  shall not create a level of risk
                        to  the  public health greater than 1 in 100,000 in the
                        surface   water   after   mixing   with  the  allowable
                        receiving  stream  volume specified in R 323.1082.  The
                        commission  may  require a greater degree of protection
                        pursuant   to   R  323.1098  where  achievable  through
                        utilization  of  control  measures  already in place or
                        where otherwise determined necessary.

                             (e)  Guidelines  shall  be adopted pursuant to Act
                        No.  306  of the Public Acts of 1969, as amended, being
                        §24.201  et seq. of the Michigan Compiled Laws, setting
                        forth   procedures    to   be   used  by  staff  in  the
                        development  of  recommendations  to  the commission on
                        allowable  levels  of  toxic substances and  the minimum
                        data  necessary  to   derive  such recommendations.  The
                        commission  may  require  the  applicant  to provide the
                        minimum   data   when   otherwise   not  available  for
                        derivation   of   the   allowable   levels   of    toxic
                        substances.

                                     -28-

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State and Water Use
Mercury Criteria Values
                             (£)    For existing discharges, the commission may
                        issue  a  scheduled  abatement  permit  pursuant  to  R
                        323.2145  upon  a  determination by the commission that
                        the   applicant  has  demonstrated  that  each  of  the
                        folloving conditions is met:

                        (i)  Immediate  attainment  of the allowable level of a
                        toxic  substance  is  not  economically  or technically
                        feasible.

                        (ii) No prudent alternative exists.

                        (iii)  During  the  period  of scheduled abatement, the
                        permitted   discharge   will  be  consistent  with  the
                        protection of the public health, safety, and welfare.

                        (iv)   Reasonable   progress   will   be   made  toward
                        compliance  with this rule over the term of the permit,
                        as provided for in a schedule in the permit.
Minnesota'
All
All
         23
Not specified

For  contaminants  other  than heat, the 96-hour median
tolerance  limit  for  indigenous  fish  and  fish food
organisms  should  not  be exceeded at any point in the
mixing zone.
All
Agriculture and Wild-
life (ClassJ)		

Limi ted Resource Value
Waters   •      ,^
                                No discharges at levels
Toxic  substances  narrative:    _ 	-«— -- --	
acutely  toxic  to  humans  or  other  animals or plant
life, or directly damaging to real property.

Toxic substances narrative:  None at levels harmful
either directly or indirectly.

Unspecified substances .shall not be allowed in such
quantities  or  concentrations  that  will  impair  the
specified uses.
Mississippi24

Public Water Supply

All    ", '  '
0.002 mg/1

Toxic  substances narrative:  Waters shall be free from
substances .  attributable   to  municipal,  industrial,-
agricultural  or  other discharges in concentrations or
combinations  which  are  toxic  or  harmful to humans,
animals or aquatic life.
                                     -29^

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State and Water Use
Mercury Criteria Values
                        There- shall  be  no substances- added, whether alone or
                        in  combination with other substances, that will impair
                        the  use  of  waters  from that which it is classified.
                        The  concentration of toxic pollutants shall not exceed
                        one-tenth  (l/10th)  of  the  96-hour  median tolerance
                        limit  based  on  available data.  The concentration of
                        toxic  pollutants that are cumulative and/or persistent
                        may  be  further limited on a case-by-case basis, where
                        such data is available.

                        Available-   references   to   be  used  in  determining
                        toxicity  limitations shall include, but not be limited
                        to   Quality   Criteria  for  Water  (Section  304(a)),
                        Federal  Regulations  under  Section  307,  and Federal
                        Regulations  under  Section  1412  of the Public Health
                        Service  Act  as amended by the Safe Drinking Water Act
                        (Pub.  L.  93-523).  The use of such information should
                        be  limited  to  that part applicable to the indigenous
                        aquatic community found in the State of Mississippi.
Missouri25

Aquatic Life

Drinking Water
Supply

Effluent Limitations
for Subsurface Waters
Groundvater
All
Classified Waters
0.5 ug/1

2 ug/1
If aquifer recharges surface -water designated for
Aquatic Life protection: 2 ug/1

When   aquifer   does   not   recharge   surface  water
designated for Aquatic Life protection: 2 ug/1

If  aquifer  recharge  has  an  effect on surface water
designated for Aquatic Life protection: 0.5 ug/1

If  aquifer recharge has a negligible effect on surface
water designated for Aquatic Life protection: 2 ug/1

The  waters  of the state shall be free from substances
or  conditions  that  have  a  harmful effect on human,
animal, or aquatic life.

toxic  substances  narrative:  Water contaminants shall
not  cause  the limits in Table A for the toxic form of
metals  and  other  toxic  substances  to  be exceeded.
Concentrations  of  such substances in bottom sediments
or  .waters  shall  not harm benthic organisms and shall
not  accumulate  through  the  food  chain  in  harmful
concentrations,  nor shall Food and Drug Administration
maximum  fish  tissue  levels  for  fish consumption be
exceeded.    More  stringent criteria may be imposed if
there  is  evidence of additive or synergistic effects.

        :     -30-

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S.tate and Water Use
Mercury Criteria Values
                        Effluent  toxicity  studies  or  site-specific instream
                        biological    studies    performed,    recognized,   or
                        sanctioned  by  the  commission  may be used to develop
                        alternative  effluent  limits  not  based  on  Table  A
                        values.

                        Other    potentially   toxic   substances   for   which
                        sufficient  toxicity  data are not available may not be
                        released  to  waters of the state until safe levels are
                        demonstrated through adequate bioassay studies.
Montana26

All

Clark Fork River
(Segments classified
as C-l and C-2)

Vater Supply (Class A-
Closed)
Water Supply (Classes
A-l, B-l, B-2, B-3)
Fish, Aquatic Life,
Wildlife, Agriculture,
Recreation In And On
The Water (Class C-3)

Fish, Aquatic Life,
Wildlife, Agriculture
Recreation in And on
the Water (Classes
C-l, C-2)

Agricultural and In-
dustrial (other than
Food Processing)
(Class E)
Not completely specified

1 ug/1 maximum instantaneous concentration
Toxic substances narrative:  No increases of toxic or
other  deleterious  substances,  pesticides and organic
and  inorganic  materials including heavy metals, above
naturally occurring concentrations, are allowed.

Toxic substances narrative:  Concentrations of toxic
or  other  deleterious substances which would remain in
the  water  after conventional water treatment must not
exceed ' the maximum contaminant levels set forth in the
1975  National Interim Primary Drinking Water Standards
(40  CFR  Part 141) or subsequent revisions or the 1979
National  Secondary  Drinking  Water  Standards (40 CFR
Part 143) or subsequent revisions.

Same as above
Toxic substances narrative:  Concentrations of toxic
or other deleterious substances must not exceed levels
which render the waters harmful, detrimental or
injurious to public health.
Toxic substances narrative:  Concentrations of toxic
or deleterious substances, pathogens, pesticides and
organic and inorganic materials including heavy
metals,  must  be  less  than  those demonstrated to be
deleterious  to . livestock  or  plants or to humans who
may  consume  such  livestock or plants or to adversely
affect other indicated uses.
                                     -31-

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State and Water Use
Mercury Criteria Values
All Classes (except A-
Closed and E)
The maximum allowable concentrations of toxic or
deleterious  substances  also  must not exceed acute or
chronic  problem  levels  as  revealed  by  bioassay or
other  methods.  The values listed in EPA Water Quality
Criteria  documents (Federal Register Vol. 45, No. 231,
Friday,  November  28, 1980, pages 79318 - 79379) shall
be  used  as a guide to determine problem levels unless
local  conditions  make these values inappropriate.  In
accordance  with  section  75-5-306(1),  MCA', it is not
necessary  that  wastes be treated to a purer condition
than the natural condition of the receiving water.
Nebraska27

All

Aquatic Life
Public Drinking Water
Agricultural
Aesthetics and Public
Health
Not completely specified

Toxic  substances  narrative:    Surface  waters of the
State  shall  be  free  from  toxic substances in toxic
amounts.    No toxic substances alone or in combination
with  other  substances in concentrations rendering the
receiving  water  unsafe or unsuitable for aquatic life
will  be allowed.  (In implementing these criteria, the
Department  will  follow  procedures  outlines  in  the
State's  Continuing  Planning Process which comply with
the  federal water quality standards, 40 C.F.R. §131.11
(1986)).   .

0.002 mg/1       .
Toxic   substances   narrative:      Wastes   or  toxic
substances  introduced  directly or indirectly by human
activity  in  concentrations that would degrade the use
(i.e.,  would produce undesirable physiological effects
in humans) shall not be allowed.

Toxic   substances   narrative:      Wastes   or  toxic
substances  introduced  directly or indirectly by human
activity  in  concentrations that would degrade the use
(i.e.,  would produce undesirable physiological effects
in crops or livestock) shall not be allowed.

Surface waters shall be free of radionuclides or toxic
substances  in concentrations or combinations which may
produce undesirable physiological responses in humans.
Nevada28

All except Humboldt
River
0.00005 mg/1
Humboldt River
    Municipal or Dom-    0.002  mg/1
    estic Supply
                                      -32-

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State and Water Use     Mercury Criteria Values


    Freshwater Aquatic  0.0041 mg/1
    Life

    Watering of Live-   0.05 ug/1
    stock and Propaga-
    tion of Wildlife

All                     Toxic . substances  narrative:  Waters must be free from
                        toxic    substances   attributable   to   domestic   or
                        industrial  waste  or  other  controllable  sources  at
                        levels  or  combinations  sufficient  to  be  toxic  to
                        human,  animal,  plant  or  aquatic  life or in amounts
                        sufficient  to interfere with any beneficial use of the
                        water.

                        The  presence  of  toxic  materials  in a water must be
                        evaluated  by  use  of a 96-hour bioassay.  Survival of
                        test  organisms  must  not be less than that in control
                        tests  which  utilize  appropriate  control water.  The
                        test  organisms  and control water must be specified by
                        the  department.    In addition, acute bioassays may be
                        required  to  determine  effluent  limitations  and the
                        exact  test  method  to  be used must be defined by the
                        department.    Failure  to  determine presence of toxic
                        materials   by   these   methods   shall  not  preclude
                        determination . of  excessive  levels of toxic materials
                        on the basis of other criteria or methods.

                        Wastes    from    municipal,    industrial   or   other
                        controllable   sources   containing   arsenic,  barium,
                        boron,  cadmium,  chromium,  cyanide,  fluoride,  lead,
                        selenium,  silver,  copper and zinc that are reasonably
                        amenable   to   treatment   or   control  must  not  be
                        discharged  untreated  or  uncontrolled into the waters
                        of  Nevada  (including  the  Colorado River System). In
                        addition,   the   limits   for  concentrations  of  the
                        chemical   constituents   must  provide  water  quality
                        consistent  with the mandatory requirements of the 1962
                        Public Health Service Drinking Water Standards.

Drinking Water Supply   None (zero)
(with treatment by
disinfection only)
Suitable For Aquatic
Life Habitat, Wildlife
Propagation, Agricul-
tural, Recreation,                      '
Boating, Esthetics
(Class A)
                                     -33-

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State and Water Use     Mercury Criteria Values

Drinking Water Supply   Toxic substances narrative:  Only such amounts as will
(with treatment by      not render receiving waters injurious to fish or
disinfection and fil-   wildlife or impair the receiving waters for any
tration only), Agri-    beneficial uses established for this class.
cultural, Aquatic
Life and Wildlife
Propagation, Recrea-
tion, Industrial and
Esthetics (Class B)           ;

Drinking Water Supply   Same as above
(following complete
treatment) Agricul-
tural, Aquatic Life,
Wildlife Propagation,
Recreation, Esthetics
and Industrial (Class C)

Boating and Esthetics,  Toxic substances narrative:  Only such amounts as will
Aquatic Life, Wildlife  not impair receiving waters for any beneficial use
Propagation, Agricul-   established for this class.
•tural and Industrial
(except for Food
Processing Purposes)
(Class D)

             29
Nev Hampshire

All                     Not specified

Water Supply            Toxic substances narrative:  No potentially  toxic
(Class A)               substances unless  naturally occurring.

All Other Uses          Toxic substances narrative:  No potentially  toxic
(Classes B and C)       substances in  toxic  concentrations  or combinations.

Fish Life               Toxic  substances  narrative:   All surface  waters of  the
                        state  shall be free from chemicals and  other materials
                        and   conditions inimical to fish life or to  maintenance
                        of fish life.

All                     Substances    potentially   toxic    are  evaluated   in
                        accordance  with EPA's published water quality criteria
                        for  64  toxic  substances dated November 1980.  Toxic
                        limits   are   to be set utilizing bioassay  procedures as
                        outlined in  CFR Vol. 45, No.  231, November 28, 1980.

                        When  establishing  limits  on toxic substances for the
                         protection  of  aquatic  life, "Appendix B - Guidelines
                         for  Deriving Water Quality Criteria for the Protection
                         of  Aquatic   Life   and Its Uses,"  CFR Vol. 45. No. 231,
                        November   28,   1980,  will   be  utilized.     Bioassay
                         procedures   and  analysis  shall   be  consistent   with

                                      -34-

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State and Water Use
Mercury Criteria Values
                         'Methods  for  Measuring  Acute  Toxicity  of Effluents
                         (third   edition)'  published  by  EPA,  or  equivalent
                         protocol as approved by the Commission.

                         Bioassay  procedures  and  application  factors used  in
                         establishing  limits  on  toxic  substances shall, as a
                         minimum,  be  no less rigorous than the recommendations
                         for  bioassays and application factors contained in the
                         National  Technical  Advisory Committee's report to the
                         Secretary  of  the  Interior on VATER QUALITY CRITERIA,
                         April 1, .1968 or latest revision thereof.
New Jersey

All
          30
FW-1 Waters


PL Waters
FW-2 Waters'
FW-2, SE, and SC
Waters
Toxic   substances  narrative:    Toxic  substances  in
waters  of  the  State  shall not be at levels that are
toxic   to   humans  or  the  aquatic  biota,  or  that
bioaccumulate  in  the  aquatic  biota  so as to render
them unfit for human consumption.

Surface  water  quality criteria shall be maintained as
to quality in their natural state.

Surface  water  quality criteria shall be maintained as
to  quality  in  their  existing  state or that quality
necessary  to  attain  or  protect the designated-uses,.
whichever is more stringent.

2 ug/1
None  which would cause standards for drinking water to
be exceeded after appropriate treatment.

Toxic substances narrative:  None, either alone or in
combination    with    other    substances,   in   such
concentrations  as  to  affect humans or be detrimental
to  the  natural  aquatic  biota,  produce  undesirable
aquatic   life,   or  which  would  render  the  waters
unsuitable for the designated uses.

Toxic    substances    shall    not   be   present   in
concentrations  that cause acute or chronic toxicity to
aquatic  biota,  or bioaccuraulate within an organism to
concentrations  that  exert  a  toxic  effect  on  that
organism or render it unfit for consumption.

The  concentrations  of  nonpersistent toxic substances
in  the  State's  waters shall not exceed one-twentieth
(0.05)  of  the acute definitive LC50 or EC50 value, as
determined   by   appropriate  bioassays  conducted  in
accordance with N.J.A.C. 7:18.

The  concentrations  of  persistent toxic substances in
the  State's  waters  shall  not  exceed  one-hundredth

             -35-

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State and ¥ater Use     Mercury Criteria Values

                        (0.01)  of  the acute definitive LC50 or 1SC50 value, as
                        determined   by   appropriate  bioassays  conducted  in
                        accordance with N.J.A.C. 7:18.

Zones 1C-6              General  criteria  narrative;    The  waters  shall not
                        contain    substances    attributable   to   municipal,
                        industrial,  or  other  discharges in concentrations or
                        amounts  sufficient  to  preclude  the  specified water
                        uses  to  be  protected.    Within this requirement the
                        waters  shall  be substantially free from substances in
                        concentrations  or  combinations  which  are  toxic  or
                        harmful  to  human,  animal, plant, or aquatic life, or
                        that  produce  color,  taste,  or odor in the water, or
                        that taint fish or shellfish flesh.

                        In  no  case  shall concentrations of substances exceed
                        those  values  given for rejection of water supplies in
                        the  United States Public Health Service Drinking Water
                        Standards.


New Mexico31

All                     Not specified

All                     Toxic  substances  narratives    Toxic  substances such
                        as,  but not limited to , pesticides, herbicides, heavy
                        metals,   and   ofganics,   shall  not  be  present  in
                        receiving  waters  in  concentrations which will change
                        the  ecological  conditions  of  receiving waters to an
                        extent  detrimental  to  man  ore  other  organisms  of
                        direct   or   indirect   commercial,   recreation*   or
                        aesthetic   value.      Toxicities   of  substances  in
                        receiving  waters  will  be  determined  by appropriate
                        bioassay  techniques,  or  other  acceptable means, for
                        the  particular  form  of  aquatic  life which is to be
                        preserved  with  the concentrations of toxic substances
                        not  to  exceed  5%  of the LC-50 provided that:  toxic
                        substances  which,  through  uptake in the aquatic  food
                        chain  and/or  storage in plant and animal tissues, can
                        be  magnified to levels which are toxic to man or other
                        organisms,  shall  not  be  present  in  concentrations
                        which   result  in  this  biological  magnification  or
                        exceed  1%  of the LC-50.  Waters designated for use as
                        domestic  water  supplies  shall not contain substances
                        in  concentrations  tat exceed drinking water standards
                        set   forth   in   Section  202.B  of  the  New  Mexico
                        Regulations Governing Water Supplies.
                                      -36-

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 State and Water Use
 Mercury Criteria Values
Nev York**

AA;AA-s;A;A-s  (Human)    2 ug/1

GA                       0.002  mg/1

Effluent  Standards  for  0.004  mg/1
Discharges To  Class GA
Waters
Fresh  Surface Waters
Saline  Surface Waters
Classes SA,  SB,  SC
.Saline Surface Waters
Class SD
Class A-Special Waters
International Boundary
Waters
Class I
Secondary Contact
Recreation and Any
Other Usage Except Pri-
mary Contact Recrea-
tion and Shellfish For
Market Purposes
Toxic, substances narrative:  None in amounts  that will
be  injurious   to fishlife or which in any manner shall
adversely  affect the flavor, color, or odor thereof, or
impair   the waters for any best usage as determined for
the specific waters which are assigned to each class.

Toxic substances narrative:  None in amounts that will
interfere   with   use  for  primary  (SA  and  SB)  or
secondary  (SC)  contact  recreation  or  that  will be
injurious  to   edible  fish or shellfish or the culture
or  propagation thereof,  or which in any manner shall
adversely  affect  the  flavor, color, odor or sanitary
condition  thereof  or  impair  the waters for any best
usage  as  determined for the specific waters which are
assigned to each class.

Toxic substances narrative:  None alone or in
combination   with   other   substances  or  wastes  in
sufficient  amounts to prevent survival offish life or
impair   the   waters  for  any  other  best  usage  as
determined  for  the specific waters which are assigned
to this class.

Toxic substances narrative:  None in amounts that will
interfere with use for primary contact recreation or
that  will  be  injurious to the growth and propagation
of  fish, or which in any manner shall adversely affect
the  flavor,  color,  or  odor  thereof  or  impair the
waters  for  any other best usage as determined for the
specific waters which are assigned to this class.

Toxic substances narrative:  None in amounts that will
interfere with use for secondary contact recreation or
that will be injurious to edible fish or shellfish or
the culture or propagation thereof,  or which in any
manner shall adversely affect the flavor, color,  odor
or sanitary condition thereof or impair the waters for
any  best  usage  as determined for the specific waters
which are assigned to this class.
                                     -37-

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State and Vater Use
Mercury Criteria Values
Class II
All Uses Not Primarily
For Recreation, Shell-
fish Culture Or The
Development Of Fish
Class GA
Fresh Ground Waters
Potable Vater Supply
Class GSA
Saline Waters
Conversion To Fresh
Potable Waters; Source
Of Potable Mineral
Waters| Raw Material
For The Manufacture Of
Sodium Chloride

Class GSB
Receiving Water For
Disposal Of Wastes
Toxic substances narrative:  None alone or in
combination with other-substances or wastes in
sufficient amounts to be injurious to edible fish
and shellfish, or the culture or propagation thereof,
or  which shall in any manner affect the flavor,  color,
odor  or  sanitary  condition of such fish or shellfish
so  as to injuriously affect the sale thereof, or which
shall  cause  any  injury  to  the  public  and private
shellfisheries of this State.

Toxic substances narrative:  None which may impair the
quality of the ground waters to render them unsafe or
unsuitable  for  a  potable  water  supply or which may
cause  or contribute to a condition in contravention of
standards for other classified waters of the State.

Toxic substances narrative:  None which may impair the
waters for use as sources of saline waters for the
best usage or as to cause or contribute to a condition
in contravention of standards for other classified
waters of the State.
Toxic substances narrative:  None which may be
deleterious, harmful, detrimental-or injurious to the
public  health, safety or welfare or which may cause or
contribute   to   a   condition   in  contravention  of
standards for other classified waters of the State.
              33
North Carolina

Fresh Surface Waters

Tidal Salt Waters

All
0.2 ug/1

0.10 ug/1

Toxic   substance   narrative  [Rule  .0208(a)]:    The
concentration  of  toxic  substances  in  the receiving
water,   (either   alone   or   in   combination,  when
affirmatively  demonstrated  to be non-bioaccumulative)
when  not  specified  elsewhere  in this Section, shall
not  exceed the concentration specified by the fraction
of  the  96-hour  LC50 value which predicts a no effect
chronic  level (as determined by the use of established
acute/chronic  ratios).  If an acceptable acute/chronic
ratio  is  not  available,  then  that  toxic substance
shall  not  exceed  one-one  hundredth  (0.01)  of  the
96-hour  LC50  or  if  it is affirmatively demonstrated
that  a toxic substance has a half-life of less than 96
hours   or   is   not   bioaccumulative,   the  maximum
concentration  shall not exceed one-twentieth (0.05) of
the  96-hour LC50.  If it is affirmatively demonstrated
                                     -38-

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State and Water Use     Mercury Criteria Values
Fresh Surface Waters
Tidal Salt Waters
that  the  standard for a particular toxic substance as
specified  in  Rule  .0211  or .0212 of this Section is
inappropriate   for  a  specific  stream  segment,  the
commission  may  revise  the  applicable  standard on a
case-by-case  basis  in  accordance with the provisions
of  Section  143-214.1 of the General Statutes of North
Carolina.

Toxic,  substances   narrative  [Rule  .0211(b)(3)(L)]:
Only  such  amounts,  whether  alone  or in combination
with  other substances or wastes as will not render the
waters    injurious   to   public   health,   secondary
recreation,  or  to  aquatic  life and wildlife (either
through   chronic   or   acute   exposure   or  through
bioaccumulation),   or   impair   the  waters  for  any
designated  uses;  any toxic substance or complex waste
will  be  considered  acutely  toxic  at instream waste
concentrations  greater  than  one third of the 96-hour
LC50  value;  acceptable levels of chronic exposure may
be  determined by test procedures deemed appropriate by
the director.

Toxic   substances   narrative  [Rule  .0212(b)(3)(L)]:
Only  such  amounts,  whether  alone  or in combination
with  other substances or wastes as will not render the
waters  injurious  to  aquatic  life  arid  wildlife, or
impair the waters for any designated uses.
North Dakota34

Classes I, IA, II
and III

All
0.002 mg/1
Toxic  substances  narrative:    Free  from  substances
attributable   to   municipal,   industrial,  or  other
discharges  or agricultural practices in concentrations
or  combinations  which  are toxic or harmful to human,
animal, plant or resident aquatic biota.

Mixing   zones  narrative:    The  96-hour  LC  50  for
indigenous  or  resident  fish  and fish food organisms
shall not be exceeded at any point in the mixing zone.

Sampling  and  testing narrative:  Bioassay tests shall
be  performed in accordance with procedures outlined in
the   latest  edition  of  "Standard  Methods  for  the
Examination  of Water and Wastewater", published by the
American  public  health  association, or in accordance
with  tests  or  analytical  procedures  that have been
found  to be equal or more applicable by the department
or  the  environmental  protection  agency.    Bioassay
studies  shall  be  made  using  a  sensitive  resident
species.

             -39-

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State and Vater Use
Mercury Criteria Values
Ohio35

All Lake Erie Uses
All Ohio River Uses

Aquatic Life Habitat

Nuisance Prevention

Public Vater Supply

Agricultural Vater
Supply

All
Not  to  exceed  0.000.5  mg/g (wet weight) in any whole
sample  of a representative aquatic organism or 0.00005
mg/1  as  a  monthly  average concentration in water or
0.0002 mg/1 at any time.

0.0002 mg/1

0.2 ug/1 (30-day ave.)

2.2 ug/1 (max.)

2.0 ug/1 (max.)                                     —

10 ug/1 (max.)
General  narrative:   Free from substances entering the
waters   as   a   result   of   human   activities   in
concentrations  that  are  toxic  or  harmful to human,
animal  or  aquatic  life  and/or are rapidly lethal in
the mixing zone.

Antidegradation  policy:  Present ambient water quality
in  state  resource waters will not be degraded for all
substances  determined to be toxic or to interfere with
any  designated  use  as  determined by the director of
Ohio environmental protection agency.

Toxic   substances   narrative:     All  pollutants  or
combinations  of  pollutants not specifically mentioned
in  this  rule, shall not exceed water quality criteria
derived  according  to  the  procedures  set  forth  in
"Draft   Guidelines  for  Deriving  Numerical  National
Vater  Quality  Criteria  for the Protection of Aquatic
Life   and   Its  Uses,"  United  States  environmental
protection  agency,  July  5, 1983, or, if insufficient
data  prevent  the  use  of  this  procedure, shall not
exceed,  at  any time, one-tenth, or, for pollutants or
combinations  of  pollutants  which  are  known  to  be
persistent  toxicants  in  the aquatic environment, one
one-hundredth  of  the ninety-six-hour median tolerance
limit  (TLm)  or  LCcg  for  any representative aquatic
species.    However, more stringent application factors
shall  be  imposed  where  justified  by "Ambient Water
Quality    Criteria,"    documents,    United    States
environmental   protection   agency,   1980;   "Quality
Criteria  for  Water,"  U.S.  environmental  protection
agency,  1976; "Water Quality Criteria 1972," '!National
Academy   of   Sciences"   and   "National  Academy  of
                                     -40-

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 State and Water Use     Mercury Criteria Values

                         Engineering,""   1973;   or  other  scientifically  based
                         publications.
                              The  median tolerance  limit (TLm)  or LCgo shall be
                         determined  by static  or  dynamic bioassays performed in
                         accordance  vith  methods outlined in  "Standard Methods
                         for   the   Examination  of   Water   and  Wastewater,"
                         fifteenth     edition,    "American    Public     Health
                         Association,"  "American  Water   Works  Association"  and
                         the  "Water   Pollution Control   Federation,   1981";  or
                         performed in  accordance  with   procedures outlined in
                         "Methods, of   Acute   Toxicity   Tests    vith   Fish,
                         Macroinvertebrates  and    Amphibians,"  United  States
                         environmental  protection  agency  660/3-75-009.   Tests
                         will   be  conducted  using  actual effluent,  receiving
                         water   and   representative aquatic  species   whenever
                         possible.

 Ohio  River              Free   from substances  in  concentrations which  are toxic
                         or  harmful   to  humans,  animals,  or  fish   and other
                         aquatic  life  which   would in   any  manner   adversely
                         affect  the   flavor,   color, odor,  or edibility of fish
                         and  other aquatic life,  wildlife or livestock or which
                         are otherwise detrimental to the designated uses.

                         Toxic substances narrative:
                         (a)   Non-cumulative    substances  -   not to  exceed
                         one-tenth    (0.1)     the  ninety-six-hour   LC~n   of
                         representative  important  species  indigenous  to  the
                         Ohio  river.

                         (b)   Cumulative  substances    -  not  to exceed  one
                         one-hundredth  (0.01)   of  the   ninety-six-hour LC5O  of
                         representative  important  species  indigenous  to  the
                         Ohio  river.

                         (c)  Other  limiting   concentrations  may   be  used when
                         justified  on  the  basis  of  available •  evidence and
                         approved   by  the  appropriate   regulatory agency   or
                         agencies.


Oklahoma36

All                      Not specified

Public And Private       0.002  mg/1
Water Supplies           The  surface   waters  of  the State  which are designated
                         as    public    and   private  water  supplies   shall   be
                         maintained   so    that    they    will    not   be   toxic,
                         carcinogenic,  mutagenic,  or teratogenic to  humans.

Fish And Wildlife        Toxic  substances narrative:   Assigning  concentration
Propagation              limits   for    the   Fish   and   Wildlife  Propagation
                         beneficial  use  is very  complex.   Limits are  generally

                                      -41-

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State and Water Use     Mercury Criteria Values
                        assigned  based  upon laboratory bioassay work designed
                        to  determine the 96-hour LCcn for a particular aquatic
                        species.    There  are  several  physical, chemical and
                        biological  problems which arise when attempts are made
                        to  develop  water  quality standards based upon single
                        maximum   concentration   values.    For  this  reason,
                        numerical  concentration  limits  are developed in this
                        section   for   specified   toxics*    For  toxics  not
                        specified,  or  where  data  is  not  available  in the
                        following,  table,   concentrations  for  nonpersistent
                        toxic  substances listed in Appendix C shall not exceed
                        0.1  of  the  96-hour  LC-Q  for  sensitive  indigenous
                        species.      Concentrations  of  persistent  toxicants
                        listed  in  Appendix  C  shall  not  exceed 0.05 of the
                        96-hour   LCcQ   for   sensitive   indigenous  species.
                        Concentrations  of  bioaccumulative toxicants listed in
                        Appendix  C  shall  not exceed 0.01 of the 96-hour LCj.Q
                        for  sensitive  indigenous  species.  Bioassay data for
                        Pimephales  promelas  (fathead  minnow)  and/or Lepomis
                        macrochirus  (bluegill)  shall  be  used in determining
                        compliance vith the above criteria.
                             Due   to   interactions •  with   water  chemistry,
                        toxicity   of  some  substances  to  aquatic  organisms
                        varies  across  the  State.  Criteria for mercury whose
                        toxicity  is  extremely  dependent upon water chemistry
                        are  listed  by segment.  The concentration varies from
                        0.6  to  1..1  depending  on  the  segment (see Oklahoma
                        Water Quality Standards Table 1).

                        Toxicity  to  Aquatic Organisms:  The surface waters of
                        the  State  outside the mixing zone but within the zone
                        of  passage  shall  be maintained so that they will not
                        be  toxic  to  fishes and other terrestrial and aquatic
                        life.   Toxic substances in surface waters of the State
                        shall   not   be  present  in  quantities  which  allow
                        significant  bioaccumulation and/or biomagnification in
                        the  food  chain.    If  substances exhibit synergistic
                        effects  when  combined,  toxicity  tests  described in
                        this  section  may  be  used  to  detect  the increased
                        toxicity.
                             No  toxicity  shall be allowed downstream from the
                        mixing  zone  as  determined by a forty-eight (48) hour
                        static   test   using  appropriate  laboratory  animals
                        conducted  in  accordance  with  "Methods for Measuring
                        the  Acute  Toxicity  of  Effluents  to  Freshwater and
                        Marine Organisms," EPA-600/4-85-013 (Rev. March, 1985).
                             In  addition,  no  toxicity  shall  be  allowed as
                        measured   using   in-situ   bioassay   with  sensitive
                        indigenous  fishes  ("An  Ih-Situ Method for Evaluating
                        Acute   Toxicity   in   Aquatic   Environment."   Noble
                        Foundation  and  Okla.  Dept. Wldlf. Cons. Symposium on
                        Pond  Mgt.,  Okla.  City,  Aug. 1985).  In-situ testing
                        must  be  conducted  over  a  period of ninety-six (96)
                        hours  unless  statistically significant differences in

                                     -42-

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State and Water Use
Mercury Criteria Values
Primary Contact
Recreation
Secondary Contact
Recreation
All
mortality  occur in a shorter period of time.  Toxicity
of   waters   may   be   determined  using  statistical
differences  for  a total mortality between control and
presumed  impact  sites.  Chronic toxicity shall not be
allowed   in   waters   of   the  State  ("Methods  for
Estimating   the  Chronic  Toxicity  of  Effluents  and
Receiving     Waters    to    Freshwater    Organisms,"
EPA-600/4-85-014).    If significant mortality does not
occur  at  the  presumed  impact site within ninety-six
(96)  hours,  a benthic macroinvertebrate survey may be
performed to determine low-level persistent toxicity.

The water shall not contain chemical, physical or
biological   substances   in  concentrations  that  are
irritating  to  skin  or  sense^ organs or are toxic or
cause illness upon ingest"i6n""by human"beirigsT  	   "

Waters shall be maintained to be free from human
pathogens  in  numbers which may produce adverse health
effects in humans.

Mixing  zones  narrative:    The concentration of toxic
substances  in  a  mixing  zone  shall  not  exceed the
96-hour LC-n for sensitive indigenous species.
Oregon
      37
                        Not specified

                        The  creation  of  tastes  or  odors  or toxic or other
                        conditions  that  are  deleterious  to  fish  to  other
                        aquatic  life  or  affect  the  potability  of drinking
                        water  or  the  palatability of fish or shellfish shall
                        not be allowed.

                        Where    industrial,    commercial,   or   agricultural
                        effluents   contain  quantities  of  potentially  toxic
                        elements,  treatment  requirements  shall be determined
                        utilizing appropriate bioassays.
Pennsylvania

All

All
            38
Not specified

General  water quality criteria narrative:  Water shall
not   contain   substances  attributable  to  point  or
nonpoint  source  waste  discharges in concentration or
amounts  sufficient  to  be  inimical or harmful to the
water  uses to be protected or to human, animal, plant,
or aquatic life.
                                     -43-

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State and ffater Use     Mercury Criteria Values
                        §93.7(f)  The  list  of specific water quality criteria
                        does  not  include  all  possible substances that could
                        cause  pollution.    For  substances  not  listed,  the
                        general  criterion  that  these substances shall not be
                        inimical  or  injurious  to  the  designated water uses
                        applies.    The  best  scientific information available
                        will  be  used  to  adjudge  the suitability of a given
                        waste Discharge where these substances are involved.

                        §93.8  Development  of  specific water quality criteria
                        for the protection of aquatic life.

                        (a)  When  a  specific  water quality criterion has not
                        been  established  for  a pollutant in section 93.7(c),
                        Table  3,  or pursuant -to -section 93•;7( f) of- this ti tie
                        (relating  to  specific  water  quality criteria) and a
                        discharge   of   a   pollutant   into  waters  of  this
                        Commonwealth  designated  to  be  protected for aquatic
                        life  in  section  93.9  of  this  title  (relating  to
                        designated  water  uses  and water quality criteria) is
                        proposed,  a  specific water quality criterion for such
                        pollutant  may  be determined by the Department through
                        establishment of a safe concentration value.

                        (b)  Establishment  of a safe concentration value shall
                        be  based  upon  data  obtained  from  relevant aquatic
                        field  studies,  continuous  flow  bioassay  test  data
                        which  exists  in  substantial available literature, or
                        data  obtained  from  specific  tests  utilizing one or
                        more  representative  important species of aquatic life
                        designated  on  a  case-by-case basis by the Department
                        and  conducted in a water environment which is equal to
                        or  closely approximates that of the natural quality of
                        the receiving waters.

                        (c)  In  those  cases where it has been determined that
                        there  is  insufficient  available  data to establish a
                        safe  concentration  value  for  a  pollutant, the safe
                        concentration  value  shall  be  determined by applying
                        the  appropriate  application factor to the 96-hour (or
                        greater)  LC50  value.    Except  where  the Department
                        determines,  based  upon  substantial  available  data,
                        that   an  experimentally  derived  application  factor
                        exists  for  a  pollutant,  the  following  application
                        factors  shall  be  used  in  the determination of safe
                        concentration values:

                             (1)   Concentrations   of   pollutants   that  are
                        noncumulative  shall  not  exceed  0.05  (1/20)  of the
                        96-hour LC50.
                                     -44-

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State and Water Use
Mercury Criteria Values
                              (2)   Concentrations   of   pollutants    that   are
                         cumulative    shall  not  exceed  0.01   (1/100)   of   the
                         96-hour LC50.

                              (3)   Concentrations   of  pollutants  with known
                         synergistic   or antagonistic effects with pollutants in
                         the   effluent or receiving water will be established on
                         a   case-by-case   basis   using    the  best   available
                         scientific data.
            39
Rhode Island
Fresh Water Aquatic
Life
Saltwater Aquatic Life  3.7
Class A
Classes B. and C
Class D
Classes A, B, C, D
Class SA
                        U.S.EPA
                        Acute
                    U.S.EPA
                    Chronic
                    .2
                    .10    all units in ug/1
The    limits   prescribed   by   the   United   States
Environmental  Protection Agency will be used where not
superseded by more stringent State requirements.

The  ambient  concentration  of  a pollutant in a water
body  designated  as  suitable for fish and/or wildlife
habitat  shall  not  exceed  the R.I. DEM Ambient Water
Quality   Guidelines  for  the  protection  of  aquatic
organisms  from  chronic  effects,  unless  the chronic
guideline  is modified by the Director based on results
of  b'ioassay  tests  conducted  in  accordance with the
terms and conditions provided in Appendix C.

The  ambient  concentration  of  a pollutant in a water
body  designated  as  suitable for fish migration shall
not   exceed   the   R.I.  DEM  Ambient  Water  Quality
Guidelines  for  the  protection  of  aquatic organisms
from  acute  effects,  unless  the  acute  guideline is
modified  by  the Director based on results of bioassay
tests  conducted  in  accordance  with  the  terms  and
conditions provided in Appendix C.

Waters  shall  be  free  from  chemical constituents in
concentrations  or  combinations which could be harmful
to  human,  animal, or aquatic life for the appropriate
most   sensitive  and  governing  water  class  use  or
unfavorably alter the biota.

None  in  concentrations or combinations which would be
harmful  to  human,  animal  or  aquatic  life or which
would  make the waters unsafe or unsuitable for fish or
shellfish    or    their    propagation,   impair   the
palatability  of  same,  or  impair  the waters for any
other uses.
                                     -45-

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State and Water Use
Mercury Criteria Values
Class SB
Class SC
Classes A,B,C,D,
SA, SB, SC
None  in  concentrations or combinations which would be
harmful  to  human,  animal  or  aquatic  life or which
would  make the waters unsafe or unsuitable for fish or
shellfish  or  their  propagation,  or impair the water
for any other usage assigned to this Class.

None  in  concentrations or combinations which would be
harmful  to  human,  animal  or  aquatic  life or which
would  make the waters unsafe or unsuitable for fish or
shellfish  or  their  propagation,  or impair the water
for  any  other  usage  assigned  to  this  Class.  The
ambient  concentration  of  a pollutant in a water body
designated   as   suitable  for  fish  and/or  wildlife
habitat  shall  not  exceed  the R.I. DEM Ambient Water
Quality   Guidelines  for  the  protection  of  aquatic
organisms  from  chronic  effects,  unless  the chronic
guideline  is modified by the Director based on results
of  bioassay  tests  conducted  in  accordance with the
terms and conditions provided in Appendix C.

If an aquatic toxicity value has not been established
in  the R.I. DEM Ambient Water Quality Guidelines, then
the  level of any "priority pollutant" shall not exceed
the  "detection limits" in the ambient water unless the
discharger  demonstrates  to  the  satisfaction  of the
Director   that   a   higher  . concentration  will  not
adversely  effect  the  most sensitive use of the water
body.              :

Classes A,B,C,D are fresh waters*

Classes SA,SB,SC are sea waters.
South Carolina

All

All
              40
Classes AA and  SAA
Not specified

Toxic  substances  narrative:    All  ground waters and
surface  waters  of  the  State  shall  at  all  times,
regardless  of  flow,  be  free  from  toxic substances
attributable  to  sewage,  industrial  waste,  or other
waste   in   concentrations   or   combinations   which
interfere  with  classified  water  uses (except within
mixing  zones  as  described  in  D.(5)  of  the  South
Carolina  Water Quality Standards), existing water uses
or  which  are  harmful  to  human,  animal,  plant  or
aquatic life.

Toxic  substances  narrative:   Natural conditions will
be  maintained  and  protected  as feasible, within the
Department's statutory authority.
                                      -46-

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State and Water Use
Mercury Criteria Values
Classes A-Trout and
B-Trout
Classes A and SB
Classes B and SC
Class SA
Class GA

Class GB


Class GC
Toxic substances narrative:  None alone or in
combination   with   other   substances  or  wastes  in
sufficient  amounts  to  be  injurious  to  reproducing
trout  populations  or  in  any manner adversely affect
the  taste,  color, odor, or sanitary condition thereof
or  impair  the  waters  for  any  other  best usage as
determined  for  the specific waters which are assigned
to this class.

Toxic   substances   narrative:     None  alone  or  in
combination   with   other   substances  or  wastes  in
sufficient   amounts  to  make  the  waters  unsafe  or
unsuitable  for primary contact recreation or to impair
the  waters  for any other best usage as determined for
the specific waters which are assigned to this class.

Toxic   substances   narrative:     None  alone  or  in
combination   with   other   substances  or  wastes  in
sufficient  amounts  to  be  harmful to the survival of
freshwater(B)  and  marine(SC)  fauna  and flora or the
culture  or  propagation  thereof;  to adversely affect
the  taste,  color, odor, or sanitary condition of fish
for  human  consumption;  to  make the waters unsafe or
unsuitable  for a source of drinking water supply after
conventional  treatment;  to make the (B) waters unsafe
or  unsuitable  for secondary contact recreation; or to
impair   the   waters  for  any  other  best  usage  as
determined  for  the specific waters which are assigned
to this class.

Toxic   substances   narrative:     None  alone  or  in
combination   with   other   substances  or  wastes  in
sufficient  amounts  to  adversely  affect  the  taste,
color,  odor,  or sanitary condition of clams, mussels,
or  oysters for human consumption; or impair the waters
for   any  other  best  usage  as  determined  for  the
specific waters which are assigned to this class.

Toxic substances narrative:  None allowed

Chemicals  narrative:    As  set  forth  in  the  State
Primary Drinking Water Regulations R.61-58.5 B.(2).

Toxic  substances narrative:  None which interfere with
any  existing  use of an underground source of drinking
water.
South Dakota

Domestic Water Supply
0.002   mg/1     The  applicable  criterion  is
maintained at all times, without exception.
to  be
                                     -47-

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State and Vater Use
 Mercury Criteria Values
All
 Toxic  substances   narrative:   Substances  which  produce
 concentrations  of  any  substance  toxic  to   humans,
 animals,   plants,or  aquatic life may not  be discharged
 or  caused  to  be  discharged into any lake or  stream.
 Toxicity   of  nonbioaccumulative  pollutants to  aquatic
 life   shall   be    determined   in   accordance   with
 §74:03:02:06.    Toxicity of bioaccumulative pollutants
 shall  be   determined    using   bioassay  methods  in
 accordance  with  §74:03:02:06  and  additional  data on
 the  rates  and effects of bioaccuraulation so  that the
 aquatic'  'community  and   those  organisms  including man
 which  use   those  aquatic  organisms for food   are
 protected  against  potential  adverse  health  effects.
 Toxic  concentrations shall  be  specified in  terms of
 24-hour  .and  30-day  average concentrations or  maximum
'concentrations  allowed • or  both.    Where numerical
 criterion  has  been  established for a toxic substance
 in   §§74:03:02:33   to    74:03:02:45,  inclusive,   the
 provisions  of  this  section  do  not  apply  to  that
 substance.
         42
Tennessee

All                     Not specified

Domestic Vater Supply   0.2 ug/1
                        Toxic  substances  narrative:    The  waters  shall not
                        contain   toxic   substances,   whether   alone  or  in
                        combination  with  other substances, which will produce
                        toxic  conditions that materially affect the health and
                        safety  of  man  or  animals,  or  impair the safety of
                        conventionally   treated  water  supplies.    Available
                        references  to  be  used in determining such conditions
                        shall   include,  but  not  be  limited  to:    Quali ty
                        Criteria  for  Water  (Section  304(a)  of  PL 92-500);
                        Federal  Regulations  under  Section  307 of PL 92-500;
                        and  Federal  Regulations  under  Section  1412  of the
                        Public  Health  Service  Act  as  amended  by  the Safe
                        Drinking Water Act (PL 93-523).

Industrial Water Supply Toxic  substances  narrative:    The  waters  shall not
                        contain   toxic   substances   whether   alone   or  in
                        combination   with   other   substances,   which   will
                        adversely affect industrial processing.
Fish And Aquatic Life
 Toxic  Substances  Narrative:  '  The  waters  shall not
 contain   substances   or   combination  of  substances
 including  disease  causing  agents  which,  by  way of
 either  direct  exposure  of  indirect exposure through
 food   chains  may  cause  death,  disease,  behavioral
 abnormalities,      cancer,      genetic     mutations,
 physiological  malfunctions  (including malfunctions in
 reproduction),  physical  deformations,  or restrict or

              -48-

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 State and Vater Use
Mercury Criteria Values
Recreation
Irrigation
Livestock Watering And
Wildlife
Effluent Limitations
(Industrial Wastewater
Treatment Plants)
 impair   growth  in  fish  or  aquatic  life  or   their
 offspring.     In  no  event  shall  the  diversity  or
 productivity   of  biota  significant  to  the  aquatic
 community   of   the  receiving  stream  be  decreased.
 References    to   be   used   in  determining  toxicity
 limitations   shall  include  but  not  be  limited   to:
 Quality  Criteria  for  Water (Section 304(a) of Public
 Law  92-500),  Federal Regulations under Section 307 of
 Public   Law  92-500,  and  Federal  Regulations  under
 Section  1412 of  the  Public  Health  Service  Act as
 amended  by   the  Safe  Drinking  Water Act (Public Law
 93-523).    The  use  of  such  information  should  be
 limited   to   that  part  applicable  to  the  aquatic
 community  found  within the receiving stream or waters
 under consideration.

 Toxic  substances  narrative:    The  water  shall  not
 contain   toxic   substances   whether   alorie   or  in
 combination   with  other  substances,  that will render
 the  waters   unsafe  or  unsuitable  for  water contact
 activities,   or will propose toxic conditions that will
 adversely affect man or animal.

 Toxic  substances  narrative:    The  waters  shall not
 contain   toxic  substances  that  will  produce  toxic
 conditions that will affect the water for irrigation.

 Toxic substances narrative:  The waters shall not
 contain   toxic   substances   whether   alone   or  in
 combination  with  other  substances, that will produce
 toxic   conditions  that  will  affect  the  water  for
 livestock watering and wildlife.

 0.05 mg/1
Texas43

All Fresh Water


All
Acute « 2.4 ug/1
Chronic = O.Q12 ug/1

(d)    Toxic  parameters.    Surface waters will not be
toxic  to  man,  or  to  terrestrial  or  aquatic life.
Additional  standards  requirements for toxic materials
are  specified  in  §307.6  of  this title (relating, to
Toxic Materials).

§307.6.   TOXIC MATERIALS.

(a)  Application.    Standards and procedures set forth
in  this  section  apply  to  all  water  in the state,
except  as  indicated in §307.8 of this title (relating

             -49-

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State and Water Use
Mercury Criteria Values
                         to  Application   of  Standards) and  §307.9 of  this  title
                         (relating  to  Determination of Standards Attainment).

                         (b)  General  provisions.

                         (1)  Water in   the  state shall not be acutely  toxic  to
                         aquatic  life except in small zones of initial  dilution
                         at   discharge    points,   in  accordance  with §307.8
                         (relating  to  Application of Standards).

                         (2)  Water in   the   state  with designated or  existing
                         aquatic  life uses   shall  not be  chronically  toxic  to
                         aquatic    life,   except  in  mixing  zones   and   below
                         critical   low-flow   conditions,   in  accordance  with
                         §307.8  of this title  (relating  to  Application   of
                         Standards).

                         (3)  Water   in   the state  shall  be  maintained   to
                         preclude   adverse    toxic   effects  on  human health
                         resulting   from' contact  recreation,  consumption   of
                         aquatic  organisms,   or  consumption  of drinking  water
                         after  reasonable treatment.    In  addition  to  other
                         provisions of   this section,  permitted discharges  or
                         other  controllable   sources  shall  not  cause maximum
                         contaminant   levels  for public drinking water supplies,
                         as  established   in  the federal Safe Drinking Water Act
                         (42  United   States   Code 300f et seq»), to be  exceeded
                         after  reasonable treatment by a water supply treatment
                         plant.      The   commission   will  utilize^ available
                         investigative and   regulatory  means  to  identify and
                         control  sources of toxic  pollutants  which  cause  or
                         could  potentially cause the following guidelines  to  be
                         exceeded:

                         (A)  EPA   maximum contaminant levels for drinking  water
                         supplies;  and

                         (B)  U.S.     Food and Drug Administration Action Levels
                         for toxic  concentrations in fish and shellfish  tissue.
Utah44

Domestic Source

Aquatic Wildlife
Classes 3A,3B,3C & 3D

All
0.002 mg/1

0.012 mg/1 - 4 day average
2.4 mg/1 - 1 hour average

Toxic  substances narratives  It shall be unlawful, and
a  violation  of  these  regulations, for any person to
discharge  or  place  any  waste  or other substance in
such  a  way  as  will  be  or may become offensive; or
conditions  which  produce  undesirable aquatic life or
which  produce  objectionable  tastes in edible aquatic
                                     -50-

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State and later Use     Mercury Criteria Values
                         organisms;    or    concentrations   or   combinations   of
                         substances    which  produce  undesirable   physiological
                         responses    in    desirable   resident   fish,   or   other
                         desirable   aquatic  life,  as determined  by bioassay  or
                         other   tests performed   in  accordance  with   standard
                         procedures  determined  by  the Committee.
Vermont
All                     Not  specified
                        Toxic  substances  narrative:   The waters of  the  state
                        shall  be  managed  so  as   to prevent  the discharge of
                        radioactive   or   toxic   wastes   in  concentrations,
                        quantities   or   combinations   that   may    create  a
                        significant  likelihood  of  an adverse impact on  human
                        health  or  acute or chronic toxicity to aquatic biota,
                        fish  or wildlife.  Unless otherwise specified by  these
                        rules,   the   Secretary  shall  determine  limits for
                        discharges   containing  radioactive  or  toxic  wastes
                        based   on   the   results   of   biological   toxicity
                        assessments  and  the  appropriate available scientific
                        data, including but not limited to:

                             1.  The  current  edition  of the  EPA publications
                        "Quality  Criteria  for  Water"  and  the  1980 Ambient
                        Water Quality Criteria Documents ("White Books")

                             2.  The  Vermont  State Health Regulation, Part 5,
                        Chapter   3  "Radiological   Health",  effective  as  of
                        12/10/77

                             3. 10 CFR 50, Appendix  I

                             In  establishing  such  limits the Secretary  shall
                        give     consideration    to   the     potential    for
                        bioaccumulation   as   well   as  any   antagonistic  or
                        synergistic  relationship  that  may  exist between the
                        wastes  being discharged and the concentration of  other
                        wastes  or  constituents  in the receiving waters.  The
                        discharge  of  radioactive   wastes shall not exceed the
                        lowest limits which are reasonably achievable.
Virginia47
Public Water Supply     0.002 mg/1

Surface Water           Saltwater      0.10 ug/1
(Chronic Criteria For
The Protection Of
Aquatic Life)
                                     -51-

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State and Water Use

All
Mercury Criteria Values

All   State   waters  shall  be  free  from  substances
attributable  to  sewage,  industrial  waste,  or other
wasted   in  concentration,  amounts,  or  combinations
which  contravene  established  standards  or interfere
directly  or  indirectly  with  reasonable,  beneficial
uses  of such water or which are inimical or harmful to
human,   animal,  plant  or  aquatic  life.    Specific
substances  to  be  controlled  include,  but  are  not
limited  to:  floating  debris,  oil,  scum,  and other
floating  material;  toxic  substances; substances that
settle  to  form  sludge deposits, and substances which
nourish  undesirable  or  nuisance  aquatic plant life.
Effluents  which  tend  to raise the temperature of the
receiving water will also be controlled.
Washington

All
          47
Not specified
Extraordinary(Class AA) Toxic substances narrative:  Toxic, radioactive, or
and Lake Class Vaters   deleterious  material concentrations shall be less than
                        those   which   adversely  affect  public  health,  the
                        natural  aquatic  environment,  or  'the desirability of
                        the water for any use.
Excellent (Class A),
Good (Class B), Fair
(Class C) Waters
All
Toxic substances narrative:  Toxic, radioactive, or
deleterious material cpncentrations shall be below
those  of  public  health  significance,  or  which may
cause  acute or chronic toxic conditions to the aquatic
biota, or which may adversely affect any water use.

Deleterious   concentrations   of   toxic,   or   other
nonradioactive  materials,  shall  be determined by the
department  in  consideration  of  the Quality Criteria
for  Water, published by USEPA 1976, and as revised, as
the  authoritative  source  for  criteria  and/or other
relevant information, if justified.
West Virginia48

Category B


Category A, B, & C


All
The  total  organism body burden of any aquatic species
shall not exceed 0.5 microgram/gram as total mercury.

The  total  mercury  concentration  (unfiltered) in any
water sample shall not exceed 0.2 ug/1.

No  sewage,  industrial  wastes or other wastes present
in  any  of  the  waters  of  the  State shall cause or
materially  contribute  to  concentrations of materials
harmful,  hazardous or toxic to man, animal, or aquatic
life.
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State and Water Use
Mercury Criteria Values
         49
Wisconsin

All (Environmental
Protection)
All
Fish And Aquatic Life
The discharge of organic mercury compounds  to  the
waters  of   the  state shall not exceed 0.00005 mg/1 of
mercury measured in a 24-hour composite sample.

The   discharge  of  inorganic  mercury  compounds  and
metallic  mercury  to the waters of the state  shall not
exceed  the  background  level  by more than 0.05 pound
per  lrOOO,000  gallons  of  effluent  discharged.  The
maximum  discharge  of  inorganic mercury shall be 0.15
pound  of  mercury  per  day  averaged  over   a  30-day
period;  however,  in  any one day there shall not be a
discharge in excess of 0.50 pound.

Toxic  .  substances    narratives       Substances   in
concentrations  or  combinations  which  are   toxic  or
harmful  to  humans  shall  not  be  present in amounts
found  to  be  of public health significance, nor shall
substances  be  present  in  amounts  which are acutely
harmful to animal, plant or aquatic life.

Toxic     substances     narrative:        Unauthorized
concentrations  of  substances  are  not permitted that
alone  or  in  combination with other materials present
are   toxic  to  fish  or  other  aquatic  life.    The
determination  of  the toxicity of a substance shall be
based   upon   the   available  scientific  data  base.
References  to be used in determining the toxicity of a
substance shall include, but not be limited to:

     1.      "Quality      Criteria     for     Water".
EPA-440/9-76-003.       United   States   Environmental
Protection Agency, Washington, D.C.,  1976,  and

     2.  "Water  Quality Criteria 1972". EPA-R3-73-033.
National  Academy  of  Sciences,  National  Academy  of
Engineering.      United   States  Government  Printing
Office, Washington, D.C.,  1974.

     3.  Questions  concerning  the permissible levels,
or  changes in the same, of a substance, or combination
of  substances,  of undefined toxicity to fish and other
biota  shall be resolved in accordance with the methods
specified  in  "Water Quality Criteria 1972", "Standard
Methods  for  the Examination of Water and Wastewater",
14th    Edition,     1975    (American   Public   Health
Association,  New  York)  or  other methods approved by
the department of natural resources.
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State and Water Use
Mercury Criteria Values
Public Water Supply
Toxic  substances  narrative:   The intake water supply
will   be   such  that  by  appropriate  treatment  and
adequate  safeguards  it  will  meet  the Public Health
Service Drinking Water Standards, 1962.
     Concentrations  of  other constituents must not be
hazardous to health.
Wyoming

All

All
       .50
Not specified

Toxic  substances-  narrative:    Toxic  or  potentially
toxic  materials  attributable  to or influenced by the
activities  of  man shall not be present in any Wyoming
surface  vaters in concentrations or combinations which
would  damage  or impair the normal growth, function or
reproduction  of  human, animal, plant or aquatic life.
Unless  otherwise specified in these Standards, maximum
allowable  concentrations  shall be based on the latest
edition  of  Quality  Criteria  for Water, published by
EPA  or  its  successor  agency,  and/or more generally
accepted scientific information.
     In    those    cases   where   maximum   allowable
concentrations  must  be  determined  through bipassay,
the  appropriate  protocol,  and  application factors as
outlined  in the latest edition of Standard Methods for
the  Examination  of  Water  and  Wastewater  or  other
methods  approved  by  the  EPA  -shall  be  used.   The
bioassay  shall  be  conducted  with an ecologically or
economically  important  sensitive  resident  specie in
the  most  sensitive  portion  of  its  life  cycle, if
applicable,  as  a test organism.  Makeup water for the
analysis  should  be  constituted  so as to approximate
the     most    probable    chemical    and    physical
characteristics  of  the  receiving  water in question.
The  observed  96-hour LC50 is then to be multiplied by
an  application  factor,  where  established by EPA, to
determine  the  "safe"  concentrations for the compound
in  question.    Where  appropriate application factors
have  not yet been established, the method for deriving
said  application factor shall be that described in the
latest  edition  of  Standard  Methods or other methods
approved by EPA.
     Toxic  substances specifically designed to kill or
eliminate   problem-causing   aquatic   life  (such  as
mosquito  larvae  or  heavy  plant growth in irrigation
ditches)  may  be  added to surface waters of the State
provided    such   substances   are   administered   in
accordance  with label directions.  However, compliance
with  label directions shall not exempt any person from
the penalty provisions of W.S. 35-ll-901(b).
     This  Section  shall  not apply to the use of fish
toxicants by the Wyoming Game and Fish Department.
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State and Fater Use     Mercury Criteria Values
American Samoa

All  Fresh Surface
Water,  Embayments,
Open Coastal  Water
and  Oceanic Waters
(shall  apply  as  a
minimum within the
zone of mixing)
Free  from substances and conditions or combinations
thereof attributable to sewage, industrial wastes,
or other activities of man which may be toxic to
humans, other animals, plants, and aquatic life.

Substances of unknown toxicity:
(a)   All effluents containing materials attributable to
the   activities  of man shall be considered harmful and
not   permissible  until  acceptable bioassay tests have
shown otherwise.  It  is  the obligation of the person
producing  the  effluent  to  demonstrate  that  it  is
harmless, .at  the request of the Environmental Quality
Commission.

(b)   Compliance with Section VI, A-4 of these standards
will  be  determined  by  use  of  indicator organisms,
analysis  of  species  diversity,  population  density,
growth  anomalies, bioassays of appropriate duration or
other  appropriate   methods   as   specified  by  the
Environmental Quality Commission.

(c)   The  survival  of aquatic Life in any waters shall
not   be less than that for the same water body in areas
unaffected   by  sewage,  industrial  wastes  or  other
activities  of  man,  or,  when  necessary*  for  other
control  water that is consistent with the requirements
for   "Experimental  Water"  as  described  in  Standard
Methods  for  the  Examination  of Water and Wastewater
(latestavailableedition).As a minimum, compliance
with  the  objective as stated in the previous sentence
shall be evaluated with a 96 hour bioassay.

(d)   In  addition,  effluent  limits  based  upon acute
bioassays   of   effluents  will  be  prescribed  where
appropriate,    additional   numerical  receiving  water
limits  including  the  water  quality criteria used to
support   toxic  effluent  standards  identified  under
Section  307 (a) of the Federal Water Pollution Control
Act   of   1972,   as  amended,   will  apply;  further,
numerical   receiving   water   limits   for   specific
toxicants   will  be  established  as  sufficient  data
becomes   available;   and   source  control  of  toxic
substances will be encouraged.
District of Columbia'

All
                    52
Toxic   substances   narrative:    The  waters,  of  the
District  shall be free from substances attributable to
point    or    non-point    sources    discharged    in
                                     -55-

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State and Water Use
                        Mercury Criteria Values
                        concentrations  that  injure,  are  toxic, to or produce
                        adverse   physiological   or  behavioral  responses  in
                        humans, plants or animals.
                           ' Those   criteria  listed  under  the  category  of
                        Toxics  shall  be  applicable only to protection of the
                        designated  beneficial  use  for  periods  of less than
                        ninety-six  (96)  hours.    The  determination  of  the
                        criteria  needed  to  protect  the beneficial use for a
                        longer  period  of time shall be made on a case by case
                        basis, and may be more stringent.
Class C (Aquatic Life,  0.000012 mg/1
Waterfowl, Shore Birds,
And Water Oriented
Wildlife)
Class D (Public Water
Supply)
Class G (Groundwaters)
Guam*

All
    .53
                        0.0001 mg/1
                        Waters shall be free from toxicants and other
                        substances  in concentrations that cannot: be reduced to
                        levels   safe  for  distribution  by  the  'existing  or
                        presently  proposed  water  treatment  facilities which
                        use these waters.

                        Waters   shall   be   free  from  toxicants  and  other
                        substances  in  concentrations  which  might  present a
                        health hazard or render the groundwaters unusable.
                        General  Criteria:    All  waters  shall  be   free  from
                        substances,     conditions   or   combinations    thereof
                        attributable   to  domestic,   commercial  and industrial
                        discharges  or agricultural, construction and land-use
                        practices  or   other human activities  that are toxic  or
                        harmful   to    humans,   animals,  plants  or   desirable
                        aquatic  life.

                        Analytical  "testing methods for  these  criteria shall  be
                        in    accordance  with   the   most  recent  editions  of
                        Standard Methods  for the Examination of Water  and
                        Wastewater   (APHA,  AWWA,
                        Analysis    of  Water   and
                                                   WPCF),
                                                   Wastes
                                   Methods for Chemical
                                   (U.S.  Environmental
ProtectionAgency),andother  methods acceptable to
GEPA  and  possessing adequate procedural precision and
accuracy.

Effects  of  toxic  or  other deleterious substances at
levels  or  combinations  sufficient  to  be  toxic  or
harmful  to  human, animal, plant or aquatic life or in
amounts  sufficient  to  interfere  with any beneficial
use  of  .the water, shall be evaluated as a minimum, by
use  of  a  96-hour  bioassay  as described in the most
recent edition of Standard Methods for the Examination
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State and Water Use     Mercury Criteria Values

                         of  Water  and   Wastewater.   Survival  of  test  organisms
                         shall  not   be  less  than  that of  controls which  utilize
                         appropriate  water.    Failure to  determine the presence
                         of  toxic  substances  by  this method shall not preclude
                         determination  of excessive  levels of toxic substances
                         on the basis of other  criteria or methods.

AH                      Toxic  substances narrative:     In  order to  provide
                         maximum  protection  for   the  propagation of fish  and
                         wildlife*.    concentrations     of   toxic  substances
                         (persistent    or   non-persistent,    cumulative    or
                         non-cumulative);   (a)   shall   not exceed  0.05   of  the
                         96-hour  LC5Q  at any time   or   place,  nor should  the
                         24-hour  average concentration   exceed   0.01  of   the
                         96-hour  LC50    or,    (b)    shall not   exceed   levels
                         calculated   By   multiplying the appropriate application
                         factor  by   the 96-hour LC5Q  values determined by using
                         the   most    sensitive   species   of   aquatic  organism
                         affected.     Whichever value (a  or b) is less shall  be
                         the  maximum allowable concentration,  unless this value
                         exceeds  the   Maximum  Numerical    Limit,   then   the
                         numerical  limit  shall constitute the  maximum  allowable
                         concentration.

                         NOTE:     Whenever natural  concentrations  of  any toxic
                         substance  or  element occur  and exceed  the   limits
                         established    in   these  standards,    this    greater
                         concentration  shall   constitute   the  limit,  provided
                         that    this  natural   concentration  was  not  directly
                         affected  by man-induced causes.


Mariana Islands

All                      Maximum  cone,  level:    0.01  ug/gram weight of  aquatic
                         organism  or 0.10  ug/1

                         Free   from   toxic or   other   deleterious substances  at
                         levels  or   in  combinations   sufficient  to be toxic  or
                         harmful  to  human,  animal,  plant, or aquatic life,  or
                         in  .amounts sufficient  to interfere with  any beneficial
                         use of  the  water.

All Surface Waters       Toxic   substances   narrative:    Criteria  for toxic
                         substances   are given  as  either a  maximum concentration
                         or   are    determined   by   multiplying    the   stated
                         application  factor  by the concentration determined  to
                         be  lethal   to  50%  of   the  most sensitive indigenous
                         organism  after 96 hours  of exposure (96  LC50).   The  96
                         LC5Q  values  shall be determined  by using  tfie bioassay
                         procedures   consistent  with   those  described   in  the
                         latest  edition of Standard Methods for the Examination
                         of Water and Wastewater.:


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State and Water Use
Mercury Criteria Values
                        The  96  LCc0  values  shall be determined by using the
                        most  sensitive indigenous organism to the substance in
                        question.    When  both  an  application  factor  and a
                        maximum  concentration are given, the lesser of the two
                        resulting  concentrations  shall  constitute  the water
                        quality standards.

                        General  Toxic  Standards:  No substance or combination
                        of  substances  including  oil  and  petroleum products
                        shall  be  present  in  surface  water  in amounts that
                        exceed  0.01  times the 96 LCeQ concentration unless it
                        can  be  demonstrated  to  the Department that a higher
                        concentration- has no adverse effect, chronic or acute,
                        on the intended uses of the water body in question.

                        General  Considerations:    Analytical  testing methods
                        for  these  criteria  shall  be  in accordance with the
                        most recent editions of Standard Methods for the
                        Examination  of Water and Wastewater, and other methods
                        published  by  knowledgeable authorities and possessing
                        adequate procedural precision and accuracy.
                             Effects  of  toxic or other deleterious substances
                        at  levels or combinations sufficient to interfere with
                        any  beneficial use of the water, shall be evaluated as
                        a   minimum, by   the  use, of  a  96-hour  bioassay-  as
                        described  in  the  most  recent  editions  of Standard
                        Methods  for  the Examination of Water and WastewaterV
                        Survival  of test organisms.shall not be less than that
                        in  controls  which utilize; appropriate water.  Failure
                        to  determine  presence   of  toxic  substances . by this
                        method  shall  not  preclude determination of excessive
                        levels  of  toxic substances  on   the  basis  of other
                        criteria or methods.
                             Pollutant  discharges shall be controlled so as to
                        protect  not  only  the   waters receiving the discharge
                        directly,  but also those waters into which the initial
                        receiving waters  may flow.
Puerto Rico

SB, SC (Coastal Waters)  1.00  ug/1
SD  (Surface Waters)

All
 1.00 ug/1

 Toxic   substances narrative:  The waters of  Puerto Rico
 shall   not   contain  any  substance   in a  concentration
 which    is    toxic   or   which   produces  undesirable
 physiological  responses  in human, fish or other  animal
 life,  and plants.

 The  waters   of Puerto   Rico  shall  not contain  two or
 more   substances  whose   combination   is toxic  or which
 will     produce   chronic    or    other    undesirable
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State and Water Use     Mercury Criteria Values
Trust Territory
                        physiological   responses  in  humans,  fish  or  other
                        animal life and plants.
All                     Free  from  substances  and  conditions attributable  to
                        the  activities . of  man  that  may  be  toxic or cause
                        irritation to humans, animals, or plants.

                        Marine         Class 1        Class 2
                        Limit          Limit          Limit
                        0.025 ug/1     0.012 ug/1     0.012 ug/1

                        Toxic   substances   narrative:    Criteria  for  toxic
                        substances  are given as either a maximum concentration
                        or   are   determined   by   multiplying   the   stated
                        application  factor  by the concentration determined  to
                        be  lethal  to  50%  of  the  most sensitive indigenous
                        organism  after  96  hours  of exposure (96 LC).  96  LC
                        values   shall   be   determined   by   using  bioassay
                        procedures  consistent  vith  those  described  in  the
                        latest edition of Standard Methods for the Examination
                        of  Water  and  Wastewater.    96 LC 50 values shall  be
                        determined  by  using  the  most  sensitive  indigenous
                        organism  to  the  substance in question.  When both  an
                        application  factor  and  a  maximum  concentration are
                        given,  the  lesser,  of  the  two  shall constitute the
                        water quality standard.
                             No  substance  or  combination of substances shall
                        be  present  in  surface  waters in amounts that exceed
                        0.01  times  the 96 LC~0 concentration unless it can  be
                        demonstrated  to  the Board that a higher concentration
                        has  no  adverse  effect,  chronic  or  acute,  on  the
                        intended uses of the water body in question.

                        General  considerations:    (1) . All  methods of sample
                        collection,   preservation,   and   analysis   used   to
  ••-—		-  --   —-- determine  compliance  with these standards shall be; in
                        accordance  with those specified in the current edition
                        of Standard Methods for the Examination of Water and
                        Wastewater  or  methods  specified by the EPA in 40 CFR
                        Part 136, as appropriate.
                             Samples   should  be  collected  at  approximately
                        equal  intervals  and  under  those conditions of  tide,
                        rainfall,  and  time  of, day  when  pollution  is most
                        likely to be a maximum.

                        (2)  Whenever natural conditions are of a lower quality
                        than  an  assigned  water quality criteria, the natural
                        conditions shall constitute the water quality criteria.

                        (3)  Whenever  2  numeric criteria are in conflict,  the
                        more  stringent  criteria  shall  constitute  the water

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State and Vater Use
Mercury Criteria Values

quality criteria.

(4)  Pollutant  discharges  to either surface or ground
waters  shall  be  controlled so as to protect not only
the  receiving  water  but also those waters into which
the initial receiving waters may flow.
Virgin Islands

All
              .57
All   surface   waters  shall  be  free  of  substances
attributable   to   municipal,   industrial,  or  other
discharges  or wastes in concentrations or combinations
which   are   toxic   or   which   produce  undesirable
physiological  responses  in  human,  fish,  and  other
animal life, and plants.
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