&EPA
United States
Environmental Protection
Agency
Office of Water
Regulations and Standards
Washington, D.C. 20460
OWRD1980
Water
Chromium
Water Quality Standards
Criteria Digest
A Compilation
of State/Federal Criteria
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NATIONAL SUMMARY
OF
STATE WATER QUALITY STANDARDS
GENERAL TOXIC SUBSTANCES PROVISIONS
JULY, 1980
PREPARED FOR
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
CRITERIA AND STANDARDS DIVISION
401 M STREET, S. W.
WASHINGTON, D. C. 20460
PREPARED BY
NALESNIK ASSOCIATES INCORPORATED
505 ELEVENTH STREET, S. E.
WASHINGTON, D. C. 20003
Contract Number 68-01-6058
Project Number WA-80-A055
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Introduction
This digest was compiled to provide general information to the public as well as
to Federal, State, and local officials. It contains excerpts from the individual
State-Federal water quality standards establishing pollutant specific criteria for
navigable 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 navigable
waters, evaluating adherence to the standards, and overseeing enforcement of
standards compliance, has been mandated by Congress.
The standards program, a nationwide strategy for surface water quality
management, contains two major elements: the use (recreation, drinking water,
fish and wildlife propagation, industrial, or agricultural) to be made of the
navigable water; and criteria to protect these uses.
Water quality criteria (numerical or narrative specifications for physical,
chemical, temperature, and biological constituents are stated in the July 1976
U.S. Environmental Protection Agency publication Quality Criteria for Water
(QCW), order # 055-001-01049-4, price $3.50, available from the Government
Printing Office, Washington, D.C. The 1976 QCW, commonly referred to as the
"Red Book," is the most current compilation of scientific information used by the
Agency as a basis for assessing water quality. This publication is subject to
periodic updating and revisions in light of new scientific and technical
information.
Chromium is an elementjrarely found in natural waters. It has oxidation states
ranging from Cr to Cr , of which the trivalent form is most commonly found
in nature. Chromium salts, primarily chromates and dichromates, are used
extensively in metal finishing, textile, and leather tanning industries. They are
also used in pigments, fungicides, and wood preservatives.
Chromium has been shown to be an essential trace element for humans even
though it has been shown to be toxic in some instances. Chromium has been
found to produce toxic effects in aquatic life when in relatively high
concentrations.
The 1976 Quality Criteria for Water recommends the following:
50 ugA (total) for domestic water supply (health)
100 ug/1 (total) for freshwater aquatic life.
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.
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REFERENCES
California Water Quality Standards by River Basins, c.a. 1975
For more detailed information on selected basins, sub-basins
and stretches of streams and coastal areas refer to California
State Water Quality Standards.
n
Delaware Water Quality Standards, March 25, 1979
Q
Idaho Water Quality Standards, c.a. September, 1979
iMissouri Water Quality Standards, c.a. February, 1978
E
American Samoa Water Quality Standards,
Revised July, 1973
F
Territory of Guam Water Quality Standards, Sept. 1975
/~i
Trust Territory of the Pacific Islands Water Quality
Standards, October 21, 1973
TT
Virgin Islands Water Quality Standards, Aug. 1973
ENVIRONMENT REPORTER. The Bureau of National Affairs, Inc.
Washington, D. C. 20037
1 Pages 701:0501-0509, February 16, 1979
2 Pages 706:1004-1008, July 20, 1979
3 Pages 711-0542-0544, August 5, 1977
4 Pages 716:0603, March 26, 1976
5 Pages 726-:1005, 1011-1013, March 7, 1980
Basic Water Quality Standards adopted May 22, 1979,
have not yet been submitted to EPA for formal approval.
6 Pages 731:1002-1009, September 8, 1978
7 Pages 746:1008-1014, October 19, 1979
8 Pages 751:0504-0505, January 25, 1980
Pages 765:0512-0515, January 30, 1976
10 Page 761:0503-0504, 1973
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11 Page 766:0504-0509, October 5, 1979
12 Pages 771:0502-0504, September 29, 1978
13 Pages 776:0504-0506, April 10, 1979
14 Pages 781:0501-0502, May 18, 1979
15 Pages 786:0501-0502, August 29, 1975
1 R
10 Page 791:0583, May 26, 1978
17 Pages 796:0103-0108, February 16, 1979
18 Pages 801:1001-1002, Sept. 29, 1978
19 Page 806:1003, March 30, 1979
90
£ Page 811:1043, 1974
91
Pages 816:0602-0607, 0642-0648, 1974
99
Pages 821:0502-0505, June 30, 1978
00
Pages 831:0501-0510, February 21, 1975
94
Page 836:0502, June 30, 1978
OR
Pages 841:0507-0537, December 7, 1979
9fi
Pages 846:0501-0508, November 17, 1978
97
Pages 851:1001-1023, December 15, 1978
oo
Pages 856:1001-1002, July 18, 1978
oq
£* Pages 861:1002-1007, August 11, 1979
OA
Pages 866:1004-1009, December 28, 1979
31 Pages 871:0501-0506, November 25, 1977
00
Pages 876-1001-1043, May 26, 1978
00
Pages 881:1001-1007, September 21, 1979
34 Pages 886:0513-0524, August 29, 1975
oe
Pages 891:1001-1129, November 16, 1979
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38
39
40
41
42
43
44
45
46
47
48
49
36 „
Pages 901:0501-0505, November 3, 1978
37
Pages 906:0501:0506, October 13, 1978
Pages 911:0501-0507, June 22, 1979
Pages 916:0541-0544, April 14, 1978
Pages 921:1001-1003, August 13, 1976
Pages 926:0541-0563, January 26, 1979
Pages 931:0501-0508, May 26, 1978
Pages 936:1001-1003, June 27, 1975
Pages 941:1001-1005, May 26, 1978
Pages 946:0501-0520, July 14, 1973
Pages 951:1002-1003, April 28, 1978
Pages 956:1001-1007, January 11, 1980
Page 741:1002, November 23, 1979
Pages 896:0301-0310, March 31, 1978
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CHROMIUM
State
Alabama
1.
Criteria Value in mg/1
Not Specified
Toxic Substances narrative: only such
amounts, whether alone or in combination
with other 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.
Toxic Substances narrative: only such
amounts, whether alone or in combination
with other substances or wastes, as will
not: render the water unsafe or unsuit-
able for swimming and water-contact
sports; be injurious to fish, wildlife and
aquatic life or, where applicable, shrimp
and crabs; impair the waters for any other
usage established for 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; 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
b'miting concentrations may be used when
factually justified and approved by the
Commission.
Only such amounts as will not render the
waters unsuitable for agricultural irriga-
tion, livestock watering, industrial cool-
ing, industrial process water supply pur-
poses, and fish survival, nor interfere with
downstream uses.
Designated Stream Use
All
Public water supply
Swimming and other whole
body water-contact sports
Shellfish harvesting
Fish and wildlife
Agricultural and industrial
water supply
—l—
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State
Alabama
(con't)
Criteria Value in mg/1
Only such amounts as will not render the
waters unsuitable for industrial cooling
and industrial process water supply pur-
poses, nor interfere with downstream
water uses.
Only such amounts as will not render the
waters unsuitable for agricultural irriga-
tion, livestock watering, industrial cool-
ing, and industrial process water supply
purposes, where applicable nor interfere
with downstream water use.
Designated Stream Use
Industrial operations
Navigation
Alaska
2.
Not specified
Toxic substances narrative: shall not
exceed Alaska Drinking Water Standards
or EPA Quality Criteria for Water.
Toxic substances narrative: same as I.
(A) (i) where contact with a product des-
tined for subsequent human consumption
is present. Same as L (C) or FWPCA
Water Quality Criteria as applicable to
substances for stockwaters. Concentra-
tions for irrigation waters shall not
exceed FWPCA Water Quality Criteria or
WQC 1972.
Toxic substances narrative: shall not
individually or in combination exceed 0.01
times the lowest measured 96-hour LC-0
for life stages of species identified by tne
department as being the most sensivtive,
biologically important to the situation or
exceed criteria cited in EPA Quality
Criteria for Water or Alaska Drinking
Water Standards whichever concentration
is less.
Toxic substances narrative: substances
shall not be present which pose hazards to
worker contact.
AU
I. Fresh water
(A) water supply
(i) drinking, culinary
and food processing
(ii) agriculture, includ-
ing irrigation and stock
watering
(iii) aquaculture
(iv) industrial, includ-
ing any water supplies used
in association with a manu-
facturing or production
enterprise other than food
processing), including
mining, placer mining,
energy production or deve-
lopment
-2-
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Criteria Value in mg/1
Designated Stream Use
Toxic substances narrative: same as L (A)
(i.)
(B) water recreation
(i) contact recrea-
tion.
Toxic substances narrative: substances
shall not be present which pose hazards to
incidental human contact.
Toxic substances narrative: shall not in-
dividually or in combination exceed 0.01
times the lowest measured 96 hour L
for life stages of species identified by t
department as being the most sensitive,
biologically important to the location, or
exceed criteria cited in EPA Quality Cri-
teria for Water or Alaska Drinking Water
Standards whichever concentration is less.
Toxic substances narrative: same as I. (A)
(iii).
Toxic substances narrative: shall not ex-
ceed EPA Quality Criteria for Water as
applicable to the substance.
Toxic substances narrative:
same as L (A) (iv).
Toxic substances narrative: same as n.
(A) (ii).
Toxic substances narrative: same as L (B)
(ii).
Toxic substances narrative:
same as L (C).
(ii) secondary
recreation
(G) growth and propa-
gation of fish, shellfish,
other aquatic life, and
wildlife including water-
fowl and furbearers
n.Marine water
(A) water supply
(i) aquaculture
(ii) seafood processing
(iii) industrial, including
any water supplies used
in association with a
manufacturing or production
enterprise (other than
food processing) including
mining, placer mining,
energy production or
development
(B) water recreation
(i) contact
recreation
(ii) secondary
recreation
(C) growth and propa-
gation of fish, shellfish,
aquatic life, and wildlife
including seabirds, water-
fowl and furbearers
-3-
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State
Criteria Value in mg/1
Designated Stream Use
Alaska
(con't)
Arizona*
Arkansas
4
California'
Toxic substances narrative:same as I. (C)
but excluding the phrase "or Alaska
Drinking Water Standards."
0.05 (Hexavalent)
Toxic substances narrative: Toxic sub-
stances shall be kept below levels which
are deleterious to human, animal, plant or
aquatic life, or in amounts sufficient. to
interfere with the beneficial use of the
water. As a minimum evaluation for the
presence of toxic substances, a water
shall be evaluated by use of a 96-hour
bioassay, guided by the document Stan-
dard Methods for the Examination of Wa-
ter and Waste water. The survival of the
test organisms shall not be less than that
in controls which utilize appropriate ex-
perimental water.
Not specified
Toxic substances narrative: Toxic mate-
rials attributable to municipal, industrial,
agricultural, or other waste discharges,
shall not be present in receiving waters in
such quanitities as to be toxic to human,
animal, plant or aquatic life or to inter-
fere with the normal propagation of aqua-
tic life. For any toxicants, concentra-
tions in the receiving waters after mixing
shall not exceed 0.01 of the 96-hour TL ,
unless they can be shown to be non-
persistant and noncumulative, and to
exhibit no synergistic interactions with
other waste or stream components. In no
case shall concentrations exceed 0.05 of
the 96-hour TLm.
0.05
1.0
0.002 - 6-month Median
0.008 - Daily Maximum
0.02 - Instantaneous Maximum
(D) harvesting for con-
sumption of raw mollusks
or other raw aquatic life
Domestic, industrial, re-
creation, aesthetic, fish,
aquatic life and wildlife
All
All
AU
Domestic Water Supply
Agricultural uses in
Basin 2 only
Ocean waters only
-4-
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State
California
(con't)
Colorado
Criteria Value in mg/1
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 appro-
priate 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 Waste-
water", latest edition. As a minimum,
compliance with this objective as stated
in the previous sentence shall be evalu-
ated with a 96-hour bioassay.
In addition, effluent limits based upon
acute bioassays of effluents will be pre-
scribed 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.
0.1 (Trivalent)
0.025 (Hexavalent)
0.05 (Trivalent and Hexavalent)
0.1 (Trivalent and Hexavalent)
Toxic substances narrative: Substances
attributable to human-induced discharges
not otherwise controlled by permits,
BMP's, or plans of operation approved by
the Division, shall not be introduced into
the waters of the State...in amounts, con-
Designated Stream Use
All
All except domestic water
supply and agricultural
Domestic water supply
Agricultural
All
-5-
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State
Colorado
(con't)
Connecticut
Criteria Value in mg/1
Designated Stream Use
Delaware
B
centrations, or combinations which are...
toxic to humans, animals, plants, or aqua-
tic life.
Not specified All
Toxic substances narrative: Note 4. The All
waters shall be free from chemical cons-
tituents 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 constitutes contained in the
Quality Criteria for Water (EPA) shall be
considered and used as guidance. In areas
where fisheries are the governing conside-
rations and approved limits have not been
established, bioassays are necessary to
establish limits on toxic substances, the
recommendations for bioassay procedures
contained in "Standard Methods for the
Examination of Water and Wastewater"
and the application factors contained, in
Quality Criteria for Water (EPA) shall be
considered. For public drinking water
supplies, the raw water sources must be
of such a quality that EPA limits as
defined by the Safe Drinking Water Act
(PL 93-523), or state limits if more strin-
gent, for finished water can be met after
conventional treatment.
Toxic substances narrative: None in con-
centrations or combinations which would
be harmful to human, animal or aquatic
life or which would make the waters un-
safe or unsuitable for fish or shellfish or
their propagation or impair the waters for
any other uses. (See Note 4. above).
Not specified All
Toxic substances narrative: None in con- All
centrations harmful (synergistically or
otherwise) to humans, fish, wildlife and
aquatic life as presecribed by EPA's
Quality Criteria for Water, 1976.
Coastal and marine
water uses
-6-
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Criteria Value in mg/1
0.05
Minimum criteria for all waters at all
times at all places: shall be free from
domestic, industrial, agricultural, or other
man-induced non-thermal components of
discharges which, alone or in combination
with other components of discharges
(whether thermal or non-thermal) are
acutely toxic; or are present in concen-
trations which are carcinogenic, muta-
genic, or teratogenic to human beings or
to significant locally occurring, wildlife
or aquatic species; or pose a serious dan-
ger to the public health, safety, or wel-
fare.
General criteria for toxic substances
(applied to all surface waters except
within zones of mixing): substances in
concentrations which injure, are chroni-
cally toxic to, or produce adverse physio-
logical or behavioral response in humans,
animals, or plants - none shall be present.
Not specified
Toxic substances narrative: No material
or substance in such concentration that,
after treatment, would exceed the
requirements of the Environmental Pro-
tection Division and the latest edition of
the Federal Drinking Water Standards.
Toxic wastes narrative: None in concen-
trations that would harm man, fish and
game or other beneficial aquatic life.
Toxic substance narrative: None
in concentrations that would prevent fish
survival.
Toxic substances narrative: Free from
toxic substances discharged from munici-
palities, industries or other sources in
amounts, concentrations or combinations
which are harmful to humans, animals or
aquatic life.
Designated Stream Use
All
All
All
All
Drinking water supplies
Recreation; fishing, propa-
gation of fish, shellfish,
game and other aquatic
life
Agricultural: industrial;
navigation
All
-7-
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State
Hawaii9
Idaho
10
Criteria Value in mg/1
Not specified
Toxic substances narrative: All waters
shall be free of substances attributable to
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, evaluation by use
of a 96-hour bioassay described. in the
most recent edition of Standard Methods
for the Examination of Water and Waste-
water shall be conducted. Survival of test
organisms shall not be less than that in
controls which utilize appropriate experi-
mental water.
Not specified
0.05
The following general water quality stan-
dards will apply to waters of the State,
both surface and underground, in addition
to the water quality standards set forth
for specifically classified waters. Manual
Sections 1-2200.04 —1-2200.06 will, how-
ever, apply only to surface waters. As a
result of man-caused point or nonpoint
source discharge, waters of the State
must not contain: (1-30-80)
.01 Hazardous Materials.
Hazardous
materials (see Manual Section 1-2003.17)
in concentrations found to be of public
health significance or to adversely affect
designated or protected beneficial uses.
(1-30-80)
.02 Deleterious Materials; Deleterious
materials (see Manual Section 1-2003.06)
in concentrations that impair designated
or protected beneficial uses without being
hazardous.
(1-30-80)
Designated Stream Use
All
All
All
Domestic Water Supplies
-8-
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State
Illinois11
Indiana
12
Criteria Value in mg/1
0.05 Hexavalent
1.0 Trivalent
Waters shall meet the following standard
at any point at which water is withdrawn:
water shall be of such quality that with
treatment consisting of coagulation, sedi-
mantation, filtration, storage and chlori-
nation, or other equivalent treatment pro-
cesses, the treated water shall meet in all
respects 0.05 (Raw and Treated)
0.3 Hexavalent
Toxic substances narrative: Freedom
from matter in concentrations or combi-
nations toxic to human, animal, plant or
aquatic life of other than national origin.
Any substance toxic to aquatic life shall
not exceed 0.1 of the 96-hour TLm for
native fish or essential fish food organisms.
Not Specified
0.05 - Lake
Harbor Areas
Michigan and Contiguous
Toxic substances narrative: free from sub
stances attributable to municipal, indus-
trial, agricultural, and other land use
practices or other discharges which are in
amounts sufficient to be toxic to humans,
animals, aquatic life or plants. As a
guideline, toxic substances should be li-
mited to the 96-hour median lethal con-
centration (LC50) for biota significant to
the indigenous aquatic community.
Toxic substances narrative: shall not ex-
ceed 0.1 of the 96-hour median lethal
concentration for important indigenous
aquatic species. More stringent applica-
tion factors shall be used when justified.
Concentrations of organic contaminants
Designated Stream Use
All
All
Public and food processing
water supply
Secondary contact and
indigenous aquatic life
AU
All
Whole Body
Aquatic life,
water supply,
water supply
AU
Contact,
Domestic
industrial
Aquatic life; fish
-9-
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State
Criteria Value in mg/1
Designated Stream Use
Indiana
(con't)
Iowa
13
Kansas
14
which can be demonstrated to be persis-
tent, to have a tendency to bioconcen-
trate in the aquatic biota, and are likely
to be toxic on the basis of available
scientific evidence, shall be limited as
determined by the Board.
Toxic substances narrative: shall not be
present after conventional treatment in
such levels as to prevent meeting the
Drinking Water Standards adopted by the
Indiana State Board of Health or by the
Indiana Environmental Management
Board.
0.05 (Total Hexavalent)
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.
Toxic substances narrative: all sub-
stances toxic or detrimental to aquatic
life shall be limited to non-toxic or non-
detrimental concentrations in surface
waters.
Toxic substances narrative: all substances
toxic to humans shall be limited to non-
toxic concentrations.
Not specified
General criteria: the individual and
cumulative effect of waste discharges to
waters shall be guided by both the pri-
mary and secondary drinking water regu-
lations (40 CFR 141) and EPA criteria for
water quality. Pollutional substances
contributed by man-made sources shall be
controlled so that all waters are free
from public health hazards or nuisance
conditions at all times.
Potable supply
Wildlife, fish, aquatic and
semiaquatic life, secondary
contact, potable water
supply
All
Wildlife, fish, aquatic and
semiaquatic life and secon-
dary contact
Potable water supply
All
All
-10-
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State
Kansas
(con't)
Kentucky
15
jouisiana
16
Criteria Value in mg/1
Toxic substances narrative: Toxic sub-
stances or toxic synergistic effects of
substances from man-made sources shall
be limited to concentrations in the re-
ceiving water that will not be harmful to
animal, plant or aquatic life.
0.1
0.05
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, fish, shellfish, and aquatic life.
The allowable instream concentration of
toxic substances, including pesticides,
shall not exceed 0.01 of the 96-hour
median lethal concentration
cn
or
of the 96-hour LC -„ for noncumulative
and nonpersistent toxic materials using a
representative
organism.
Not specified
indigenous aquatic
Toxic substances narrative: free from
such concentrations of substances attri-
butable to waste water or other dis-
charges sufficient to injure or are toxic or
produce adverse physiological response in
humans, animals, fish, shellfish, wildlife,
or plants.
Shall not be present in quantities that
alone or in combination will be toxic to
animal or plant life. In all cases the level
shall not exceed the TLm 96/10. Bioassay
techniques will be used in evaluating toxi-
city utilizing methods and species of test
organisms suitable to the purpose at hand.
Toxic substances shall not exceed the
levels established by the USPHS drinking
water standards latest edition.
Designated Stream Use
All
Warmwater Aquatic habitat
Domestic water supply
AU
Warmwater aquatic
habitat
AU
AU
Public water supply
-11-
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State
Maine
17
Maryland
18
Massachusetts
19
Criteria Value in mg/1
Prohibited
50 ug/1
Toxic substances narrative: no waste sub-
stances containing chemical constituents
which would be harmful to humans, ani-
mal or aquatic life.
Not specified
Toxic substances narrative: at all times
free from toxic substances attributable to
sewage, industrial waste, or other waste
in concentrations or combinations which
are harmful to human, animal, plant or
aquatic life.
Not specified
Toxic substances narrative: free from
pollutants in concentrations or combina-
tions that are toxic to humans or aquatic
life.
For each class, the most sensitive benefi-
cial uses are identified and minimum cri-
teria for water quality in the water
column are established. The minimum
criteria in Reg. 3.4 have been developed
by applying the criteria contained in the
EPA -publication Quality Criteria for
Water (EPA-440/9-76-023) to account for
local conditions including, but not limited
to:
(a) The characteristics of the biological
community
(b) Temperature, weather and flow
characteristics, and
(c) Synergistlc and antagonistic effects
of combinations of pollutants.
The Division will use the EPA publication
entitled Quality Criteria for Water,
EPA-440/9-76-023 as guidance in establi-
shing case-by-case discharge limits for
Designated Stream Use
All
Class B
AU
All
AU
AU
AU
-12-
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State
Criteria Value in mg/1
Designated Stream Use
Massachusetts
(con't)
Michigan
20
Minnesota
21
pollutants not specifically listed in these
standards but included under the heading
"Other Constituents" in Regulation 3.4,
for identifying bioassay application
factors and for interpretations of narra-
tive criteria. Where the minimum cri-
teria specifically listed by a Division in
this part differ from those contained in
the federal criteria, the provisions of the
specifically listed criteria in these stan-
dards shall apply.
Not Specified.
Toxic substances narrative: (1) toxicity of
undefined toxic substances not included in
(2) and (3) below shall be determined by
development of 96-hour TLm's or other
appropriate effect end points obtained by
continuous-flow or in situ bioassays using
suitable test organisms. Shall not exceed
safe concentrations as determined by
applying an application factor, based on
knowledge of behavior of toxic substances
and organisms to be protected, to the
TLm or other appropriate effect end
point.
(2) defined toxic substances shall be
limited by application of recommenda-
tions contained in the chapter on Fresh-
water Organisms, Report of the NTAC to
Secretary of the Interior, WQC, 1968, or
by application of any toxic effluent stan-
dard, limitation or prohibition promul-
gated by EPA pursuant to section 307(a)
of PL92-500, whichever is more restric-
tive.
(3) shall not exceed the permissible inor-
ganic chemicals criteria for raw public
water supply in Report of the NTAC to
Secretary of the Interior, WQC, 1968.
0.05 (Hexavalent)
0.02
All
All
All
Public water supply
Domestic (Classes A, B, C & D);
Fisheries and recreation
(Classes B & C)
Fisheries and recreation
(Class A)
-13-
-------
State
Minnesota
(con't)
Mississippi
.22
Missouri
.D
Montana
23
Criteria Value in mg/1
96-hour TLm for indigenous fish and fish
food organisms should not be exceeded at
any point in the mixing zone.
Toxic substances narrative: none at le-
vels acutely toxic to humans or other
animals or plant life.
Toxic substances narrative: none at levels
harmful either directly or indirectly.
0.05
Toxic substances narrative: free from
substances attributable to municipal, in-
dustrial, agricultural or other discharges
in concentrations or combinations which
are toxic to humans, animal or other
aquatic life.
Toxic substances narrative: the concen-
tration of toxic pollutants shall not ex-
ceed 0.1 of the 96-hour TLm based on
available data.
0.01
0.05
All waters, at all times shall be free from
substances or conditions that have a
harmful effect on human, animal, or
aquatic life.
Not specified
Toxic substances narrative: free from
substances attributable to municipal, in-
dustrial, agricultural practices or other
discharges that will create concentrations
or combinations of materials which are
toxic to human, animal, plant or aquatic
life.
Toxic substances narrative: no increases
above naturally occuring concentrations
are allowed.
Designated Stream Use
All
All
Agriculture and wildlife
(Class B)
Public Water Supply
AU
Shellfish Harvesting
Recreation, fish and
wildlife.
Aquatic life, irrigation
Drinking water supply
AU
AU
Water supply (Class
A-Closed)
-14-
-------
State
Criteria Value in mg/1
Designated Stream Use
Montana
(con't)
Nebraska
24
Nevada
25
Toxic substances narrative: concentra-
tions of toxic substances after treatment
for domestic use are not to exceed re-
commended limits in latest EPA drinking
water standards; maximum allowable con-
centrations are to be less than acute or
chronic problem levels as revealed by
bioassay or other methods.
Concentrations of toxic or other delete-
rious substances, pesticides and organic
and inorganic materials including heavy
metals, are not to exceed levels known or
demonstrated to be of public health signi-
ficance; also maximum allowable concen-
trations are to be less than acute or
chronic problem levels as revealed by
bioassay or other methods.
Toxic substances narrative: Concentra-
tions of toxic or deleterious substances,
pesticides and organic and inorganic
materials including heavy metals, are to
be less than those demonstrated to be
deleterious to livestock or plants or their
subsequent consumption by humans or to
adversely affect other indicated uses.
Not specified
Toxic substances narrative: none alone or
in combination with other substances or
wastes in concentrations rendering the
receiving water unsafe or unsuitable for
the assigned beneficial uses.
0.05
0.05
Water supply (classes
A-Open-D,, B-D1,
B-Do, B-Dt)
Fish, aquatic life, wildlife,
agriculture, industrial, recrea-
tion in and on the water
(classes C-Dt
,,C-D2)
Agricultural and industrial
(other than food processing)
All
All
All (Truckee River as indi-
cated in Table 43A of
Nevada Water Pollution
Control Regs., Article 4.2.5)
All (all waters indicated in
Article 4.1.3.1, Nevada
Water PoUution Control
Regs.)
-15-
-------
State
Nevada
(con't)
Criteria Value in mg/1
0.1
Toxic substances narrative: free from
toxic substances attributable to domestic
or industriial waste or other controllable
sources at levels or combinations suffi-
cient to be toxic to human, animal, plant
or aquatic life. The presence of toxic
materials in a water shall be evaluated by
use of a 96-hour bioassay. Survival of
test organisms shall not be less than that
in control tests which utilize appropriate
control water. Failure to determine pre-
sence of toxic materials by these methods
shall not preclude determination of exces-
sive levels of toxic materials on the basis
of other criteria or methods. No wastes
from municipal or industrial or other con-
trollable sources containing arsenic,
barium, boron, cadmium, chromium, cya-
nide, fluoride, lead selenium, silver,
copper and zinc that are reasonably
amenable to treatment or control will be
discharged untreated or uncontrolled into
the waters of Nevada. In addition, the
limits for concentrations of the chemical
constituents will provide water quality
consistant with the mandatory require-
ments of the 1962 Public Health Service
Drinking Water Standards.
None (zero)
Toxic substances narrative: only such
amounts as will not render receiving wa-
ters injurious to fish or wildlife.
Designated Stream Use
All (all waters indicated in
Article 4.1.3.2, Nevada
Water Pollution Control
Regs.)
All
Drinking water supply
(with treatment by disin-
fection only) suitable for
aquatic life habitat, wild-
life propagation, agricul-
tural, recreation, boating,
esthetics
Drinking water supply
(with treatment by disin-
fection and filtration only),
agricultural, aquatic life
and wildlife propagation,
recreation, industrial and
esthetics
-16-
-------
State
Criteria Value in mg/1
Designated Stream Use
Nevada
(con't)
Toxic substances narrative: only such
amounts as will not render receiving wa-
ters injurious to fish and wildlife.
Toxic substances narrative: only such
amounts as will not impair receiving wa-
ters for uses of this class.
.26
New Hampshire Not specified
New Jersey
27
Toxic substances narrative: shall be free
from chemicals inimical to fish life or the
maintenance of fish life
Toxic substances narrative: no poten-
tially toxic substances unless naturally
occurring.
Toxic substances narrative: no poten-
tially toxic substances in toxic concen-
trations or combinations.
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 con-
tained in the National Technical Advisory
Committee's report to the Secretary of
the Interior on WATER QUALITY
CRITERIA, April 1, 1968 or latest revi-
sion thereof.
0.05 (Hexavalent)
Toxic substances narrative: shall not ex-
ceed l/20th of the TL50 value at 96
hours. Combinations of toxic substances
will be based on the same principle.
Toxic substances narrative: a concentra-
tion of a persistent pesticide shall not
exceed 1/100 of the TL50 at 96 hours as
determined by appropriate bioassay.
Drinking water supply
(following complete treat-
ment), agricultural, aqua-
tic life, wildlife propa-
gation, recreation, and
industrial
Boating and esthetics,
aquatic life, agricultural
and industrial (except for
food processing purposes)
All
Fish life or the mainten-
ance of fish life
Water supply
All except water supply
All
All
All
-17-
-------
State
Criteria Value in mg/1
Designated Stream Use
New Jersey
(con't)
Toxic substances narrative: no man-made
waste water discharges.
New Mexico
28
Toxic substances narrative: none, either
alone or in combination with other sub-
stances, in concentrations as to affect
humans or be detrimental to the natural
aquatic biota or to other designated uses.
None which would cause drinking water
standards to be exceeded after appro-
priate treatment.
Toxic substances narrative: none either
alone or in combination with other sub-
stances; in concentrations as to affect
humans or be detrimental to the natural
aquatic biota or to other designated uses.
Not specified
Toxic substances narrative: shall not be
present in concentrations which will
change the ecology of receiving waters to
an extent detrimental to man or other
organisms of direct or indirect commer-
cial, recreational or esthetic value. Toxi-
cities of substances in receiving waters
will be determined by appropriate bio-
assay techniques, or other acceptable
means, for the particular form of aquatic
life which is to be preserved with the
concentrations of toxic materials not to
exceed 5 percent of the 96-hour LD50
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.
Maintenance of natural
state quality (Class FW-1
waters designated to be set
aside for posterity to re-
present the natural aquatic
environment and its asso-
ciated biota)
Public water supply (after
treatment); propagation of
natural biota; primary con-
tact recreation; industrial
and agricultural water sup-
ply; shellfish harvesting;
secondary contact recrea-
tion; migration of anadro-
mous fish; maintenance of
wildlife; other reasonable
uses
Propagation of natural bio-
ta; primary and secondary
contact recreation; indus-
trial and agricultural water
supply; shellfish harvest-
ing; migration of anadro-
mous fish; maintenance of
wildlife; other reasonable
uses
All
Recreation; desirable
aquatic life
-18-
-------
State
Ohio
32
Criteria Value in mg/1
0.1
0.05
0.1
0.1 (case by case variations)
0.05
0.1
0.05
0.05 (Hexavalent)
0.1
General narrative: free from substances
resulting from human activities in con-
centrations toxic or harmful to human,
animal or aquatic life and/or are rapidly
lethal in the mixing zone.
Antidegradation policy: present ambient
water quality will be maintained for all
toxic substances.
Designated Stream Use
Warmwater habitat
Note A
Exceptional warmwater
habitat; coldwater habitat;
Note A.
Seasonal warmwater
habitat, Note A
Limited warmwater
habitat; Note A
Public water supply
Note A
Agricultural water supply
Note A
All Lake Erie uses
Note B
All Ohio River uses
All Lower Cuyahoga
River uses.
All
All
Toxic substances narrative: 0.01 times 96-
hour TLm or LC50 for representative
aquatic species. Persistent toxicants
shall not exceed 0.01 times 96-hour TLm
or LC50. TLm or LC50 shall be deter-
mined by static or dynamic bioassays. At
least 90 per cent of the volume of the
mixing zone shall not exceed at any time
the 24- to 96-hour TLm or LC50 for
representative aquatic species.
Warmwater habitat; excep-
tional warmwater habitat;
coldwater habitat; seasonal
warmwater habitat; limit-
ed warmwater habitat. All
Lake Erie uses
-19-
-------
State
Ohio
32
Criteria Value in mg/1
0.1
0.05
0.1
0.1 (case by case variations)
0.05
0.1
0.05
0.05 (Hexavalent)
0.1
General narrative: free from substances
resulting from human activities in con-
centrations toxic or harmful to human,
animal or aquatic life and/or are rapidly
lethal in the mixing zone.
Antidegration policy: present ambient
water quality will be maintained for all.
toxic substances.
Designated Stream Use
Warmwater habitat
Note A
Exceptional warm water
habitat; coldwater habitat;
Note A.
Seasonal warm water
habitat, Note A
Limited warm water
habitat; Note A
Public water supply
Note A
Agricultural water supply
Note A
All Lake Erie uses
NoteB
All Ohio River uses
All Lower Cuyahoga
River uses.
All
All
Toxic substances narrative: 0.01 times 96-
hour TLm or LC50 for representative
aquatic species. Persistent toxicants
shall not exceed 0.01 times 96-hour TLm
or LC50. TLm or LC50 shall be deter-
mined by static or dynamic bioassays. At
least 90 per cent of the volume of the
mixing zone shall not exceed at any time
the 24- to 96-hour TLm or LC50 for
representative aquatic species.
Warmwater habitat; excep-
tional warm water habitat;
coldwater habitat; seasonal
warmwater habitat; limit-
ed warmwater habitat. All
Lake Erie uses
-20-
-------
State
Ohio (con't)
Oklahoma
33
Oregon
34
Criteria Value in mg/1
Note A: see exceptions under Ohio Admi-
nistrative Code Regulations 3745-1-08-
(C)(l) for certain stream segments.
Note B: see exceptions under Ohio
Administrative Code Regulations 3745-1-
11(C) for certain areas.
0.05 (Hexavalent)
Toxic substances narrative: waters will
not be toxic to humans, fish and wildlife,
and other terrestrial and aquatic life, nor
detrimental to any beneficial use inclu-
ding continued ingestion by livestock or
use for irrigation. Toxic substances shall
not be present in quantities which allow
significant bioaccumulation and/or bio-
magnification in the food chain.
Toxic substances narrative: toxic sub-
stances not removable by ordinary water
treatment techniques shall not exceed the
limits in Section 4.1 of the Oklahoma
Water Quality Standards.
Toxic substances narrative: concentra-
tions of nonpersistent toxic substances
shall not exceed 0.1 of the 96-hour LC50
for the most sensitive indigenous species.
Concentrations of persistent toxicants
shall not exceed 0.05 of the 96-hour
LC50, for the most sensitive indigenous
species. Bioassay data for Pimephales
prommelas (Fathead minnow) and/or
Lepomis macrochirus (Bluegill) shall be
used in determining compliance.
Mixing zones narrative: shall not exceed
the 96-hour TLm for the most sensitive
indigenous species.
General water quality standards appli-
cable to all waters except where super-
seded by special water quality standards
applicable to specifically designated
waters. No wastes shall be discharged
Designated Stream Use
Public and private
water supplies
All
Public and private water
supplies
Aquatic life
All
All
-21-
-------
State
Criteria Value in mg/1
Designated Stream Use
Oregon
(con't)
35
Pennsylvania
Rhode Island
36
and no activities shall be conducted which
either alone or in combination with other
wastes or activities will cause toxic con-
ditions that are deleterious to fish or
other aquatic life or affect the potablity
of drinking water.
0.05 Special water quality standard All
applicable to: Main stem Klammath
River; Multnomah Channel; Main stem
Williamette River; Main stem Columbia
River from eastern Oregon-Washington
border westward to Pacific Ocean; Main
stem Grande Ronde River; Main stem
Walla Walla River; Main stem Snake River
in and adjacent to Oregon.
0.02 Special water quality standard All
applicable to Rouge River Basin; Umpqua
River Basin; McKenzie River Basin;
Santiam River Basin.
0.05 (Hexavalent) All
Toxic substances narrative: shall not be All
inimical or injurious to the designated
water use.
None in concentrations or combinations Class SA/SA
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.
None in concentrations on combinations Class SB
which would be harmful to human, animal
or aquatic life or which would make the
waters unsafe or unsuitable for fish of
shellfish or their propagation, or impair
the water for any other usage assigned to
this Class.
None in concentrations or combinations Class SC
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
m
-22-
-------
State
Criteria Value in mg/1
Designated Stream Use
Rhode Island
(con't)
South Carolina
37
the water for any other usage assigned to
this Class.
Waters shall be free from chemical
constitutents in concentrations or combi-
nations which would be harmful to human,
animal, or aquatic life for the appropriate
most sensitive and governing water class
use or unfavorably alter the biota.
In areas where fisheries are the governing
considerations and approved limits have
not been established, bioassays shall be
performed as required by the appropriate
agencies. The latest edition of the
federal publication Water Quality Criteria
will be considered the interpretation and
application of bioassay result. Bioassays
shall be performed according to the latest
edition of Standard Methods for the
Examination of Water and Wastewater
(APHA).
For public drinking water supplies, the
limit prescribed by the United States
Environmental Protection Agency will be
used where not superseded by more strin-
gent state requirements.
Not specified
Toxic substances narrative: none (zero).
Toxic substances narrative: none in
amounts exceeding limitations established
and adopted by the Department of Health
and Environmental Control.
Toxic substances narrative: none alone or
in combination with other substances or
wastes in sufficient amounts to be inju-
rious to edible fish or shellfish or the
culture or propagation thereof.
AU
Domestic and food pro-
cessing; trout fishing; out-
standing recreational or
ecological resources
Direct water contact
(swimming); domestic
supply; propagation of fish;
industrial; agricultural
Shellfish harvesting; direct
water contact (swimming);
crabbing; commercial fish-
ing; propagation of marine
fauna and flora
-23-
-------
State
South Carolina
(con't)
South Dakota
38
Tennessee
39
Texas
40
Criteria Value in mg/1
Toxic substances narrative: shall be free
from toxic substances attributable to
sewage, industrial waste, or other waste
in concentrations or combinations which
are harmful to human, animal, plant or
aquatic life.
0.05
Concentrations of chemicals toxic to
humans, animals, plants, or the most
sensitive stage or form of aquatic life,
greater than 0.1 times the median toler-
ance limit for short residual compounds or
0.01 times the median tolerance limit for
an accumulative substance or substances
exhibiting a residual life exceeding thirty
days in the receiving waters. Median
tolerance limits shall be determined in
accordance with section 34:04:02:06.
Concentrations specified for toxic
materials shall be based on daily
averages, but the concentrations shall not
exceed one hundred and twenty-five per
cent of the value specified in this section
at any time or at any point in the
receiving water.
The instream concentrations of toxic
pollutants shall not exceed 1/10 of the 96-
hour LC50 based upon available data using
one or more of the most sensitive organ-
isms significant to aquatic community of
the waters under consideration. Cumula-
tive substance may be further limited on
a case-by-case basis.
Toxic substances narrative: No toxic sub-
stances added that will produce toxic con-
ditions that materially affect man or ani-
mals; impair the safety of a conven-
tionally treated water supply; affect the
water for industrial processing, fish or
aquatic life, man or animal, livestock and
wildlife, navigation, irrigation.
Not specified
Designated Stream Use
All
Domestic Water Supply
All
Aquatic life
All
All
-24-
-------
State
Texas
(con't)
Criteria Value in mg/1
Toxic substances narrative: the surface
waters of the State shall be maintained so
that they will not be toxic to man, fish
and wildlife, and any other terrestrial and
aquatic life.
Toxic substances narrative: toxic mate-
rials not removable by ordinary water
treatment techniques shall not exceed
USPHS Drinking Water Standards or those
established by EPA pursuant to the Safe
Drinking Water Act. For a general guide,
with respect to fish toxicity, receiving
waters outside mixing zones should not
have a concentration of nonpersistent to-
xic materials exceeding 0.1 of the 96-hour
TLm, where the bioassay is made using
fish indigenous to the receiving waters.
For persistent toxicants, concentrations
should not exceed 0.05 of the 96-hour
TLm.
Designated Stream Use
All
Public drinking water
supplies
Utah
41
Vermont
42
0.05 dissolved (disapproved by EPA,
promulgation pending)
0.1 dissolved (disapproved by EPA,
promulgation pending)
0.1 dissolved (disapproved by EPA,
promulgation pending.
Toxic substances narrative: it shall be
unlawful to discharge or place any waste
or other substance in concentrations or
combinations which produce undesirable
physiological responses in desirable resi-
dent fish, or other desirable aquatic life,
as determined by bioassay or other tests.
Not Specified
Wastes discharged to waters of the State
shall contain no chemical or radiological
constituents which would be inconsistent
with the water uses associated with the
assigned water class.
Domestic water supplies
Aquatic life
Agriculture
Afl
All
-25-
-------
State
Criteria Value in mg/1
Designated Stream Use
Vermont
(con't)
... . . 43
Virginia
Washington
44
Discharge of radioactive material to
waters of the State shall not exceed the
lowest practicable limits after utilization
of the latest technological development
and equipment for control of radioactive
emissions. In no event shall the discharge
of such materials exceed the limits
established by the Agency of Human
Services.
There shall be no discharge of wastes
containing any of the prohibited sub-
stances set forth below in detectable
amounts either to waters of the State or
to a municipal wastewater collection
and/or treatment facility except in those
cases where a process water contains an
incoming level of a prohibited substance
due to natural or other causes. In such
cases the concentration of the prohibited
substance or substances in the actual
wastes discharged shall not be increased.
250 (total)
0.1 (total)
Toxic substances narrative: free from
toxic substances attributable to sewage,
industrial waste, or other waste in con-
centrations, amounts, or combinations
which are inimical or harmful to human,
animal, plant, or aquatic life.
Not Specified
Toxic substances narrative: toxic material
concentrations shall be below those which
adversely affect public health, and the
natural aquatic environment.
Toxic substances narrative: toxic mate-
rial concentrations shall be below those
which adversely affect public health, or
which may cause acute or chronic toxic
conditions to the aquatic biota.
Public water supply (at
raw water intake point).
AU
All
AU
All uses for extraordinary
(class AA) and lake class
waters
All uses for excellent
(class A), good
(class B), and fair
(class C) waters
-26-
-------
State
Criteria Value in mg/1
Designated Stream Use
Washington
(con't)
AC.
West Virginia
A a
Wisconsin
Wyoming
47
Deleterious concentrations of toxic, or
other honracfioactive materials, shall be
determined by the department in consi-
deration of the "Quality Criteria for
Water," published by EPA 1976, and as
revised, as the authoritative source for
criteria and/or other relevant infor-
mation, if justified.
0.05 (Hexavalent)
Toxic substances narrative: not to exceed
0.1 of the 96-hour TLm.
No sewage, industrial wastes or other
wastes present in any of the waters of the
State shall have concentrations of mate-
rials poisonous to human, animal, or aqua-
tic life.
Not specified
Toxic substances narrative: 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 which are acutely
harmful to animal, plant or aquatic life.
Toxic substances narrative: the intake
water supply will by appropriate treat-
ment and adequate safeguards meet the
PHS Drinking Water Standards, 1962.
Not specified
Toxic substances narrative: none in con-
centrations or combinations attributable
to or influenced by the activities of man
which would damage or impair the normal
growth, function or reproduction of hu-
man, animal, plant or aquatic life. Maxi-
mum allowable concentrations shall be
based on latest edition of Quality Criteria
for Water by EPA and/or more generally
accepted scientific information.
All
All
All
All
All
Public water supply
All
All
-27-
-------
State
Criteria Value in mg/1
American Samoa Not Specified
Free from substances or combinations
thereof attributable to sewage, industrial
wastes, or other wastes which may be
toxic to hurnans, other animals, plants,
and aquatic life.
Substances of unknown toxicity; All efflu-
ents containing foreign materials 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.
Compliance with Section VLB. of these
Standards will be determined by use of
indicator organisms, analysis of species
diversity, population density, growth
anomalies, bioassays of appropriate dura-
tion or other appropriate methods as
specified by the Environmental Quality
Commission.
The survival of aquatic life in surface
waters shall riot be less than that for the
same water body in areas unaffected by
sewage, industrial wastes or other activi-
ties 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
(latest edition)? As a minimum, com-
pliance with the objectives 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 pres-
cribed 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.
Designated Stream Use
All
All
-28-
-------
State
District of
Columbia
48
Guam
Puerto Rico
49
Criteria Value in mg/1
0.1
0.05
Toxic substances narrative: The waters
shall at all times be free from: toxic
substances attributable to sewage, indus-
trial waste, or other waste in concentra-
tions or combinations which interfere di-
rectly or indirectly with water uses, or
which are harmful to human, animal,
plant, or aquatic life.
0.01; or 0.01 x 96-hour LC50, whichever is
less
0*05
In order to provide maximum protection
for the propagation of fish and wildlife,
concentrations of toxic substances shall
not exceed levels calculated by multi-
plying the application factors by the 96-
hour LC50 values determined using the
receiving water in question and the most
sensitive species of aquatic organism
affected.
When the concentration based on the 96-
hour LC50 data exceeds the maximum
numerical limits, the numerical limits
shall constitute the criteria.
The application factors and maximum
numerical limits are derived from the
NAS-NAE 1972 Report of the Committee
on Water Quality Criteria.
0.3 (Trivalent)
0.05 (Trivalent)
0.05 (Hexavalent)
Toxic substances narrative: shall not con-
tain substances in concentrations or com-
binations which are toxic or which pro-
duce undesirable physiological responses
in human, fish or other animal life, and
Designated Stream Use
Aquatic life
Domestic Water Supply
All
AU
Drinking water supply •
All surface waters of the
Territory except 2c
All (coastal waters)
All (surface waters)
All (surface and coastal
waters
AU
-29-
-------
State
Puerto Rico
(con't)
Trust Territory of
the Pacific
Islands
.u
Virgin Islands
H
Criteria Value in mg/1
plants. When two or more toxic materials
are present at the same time, the chronic
effect of such combinations shall be taken
into account and the applicable standard
shall be determined by bioassay or other
approved method.
Free from substances or combinations
thereof attributable to sewage, industrial
wastes, or other wastes toxic to humans,
animals, plants and aquatic life.
All surface waters shall be free of sub-
stances attributable to municipal, indus-
trial, 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.
Designated Stream Use
All
All
-30-
-------
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