Drinking Water Regulations and Health Advisories


DRINKING WATER REGULATIONS

    AND HEALTH ADVISORIES
                 by
            Office of Water
     U.S. Environmental Protection Agency
           Washington, D.C.
             202-382-7571
      SAFE DRINKING WATER HOTLINE
            1-800-426-4791
  Monday thru Friday, 8:30 AM to 5:00 PM EST
              April 1991

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LEGEND

Abbreviations column descriptions are:

MCLG - Maximum Contaminant Level Goal. A non-enforceable concentration of a drinking
water contaminant that is protective of adverse human health effects and allows an
adequate margin of safety.

MCL - Maximum Contaminant Level. Maximum permissible level of a contaminant in water
which is delivered to any user of a public water system.

RfD - Reference Dose. An estimate of a daily exposure to the human population that is
likely to be without appreciable risk of deleterious effects over a lifetime.

DWEL - Drinking Water Equivalent Level. A lifetime exposure concentration protective of
adverse, non-cancer health effects, that assumes all of the exposure to a contaminant
is from a drinking water source.

(*) The codes for the Status Reg and Status HA columns are as follows:

F - final
D - draft
L - listed for regulation
P - proposed (Phase II and V proposals)

Other codes found in the table include the following:

NA - not applicable
PS - performance standard 0.5 NTU -1.0 NIL)
JJ - treatment technique

** - No more than 5% of the samples per month may be positive. For systems collecting
fewer than 40 samples/month, no more than 1 sample per month
may be positive.
***
guidance

Large discrepancies between Lifetime and Longer-term HA values may occur because
of the Agency's conservative policies, especially with regard to carcinogenicity, relative
source contribution, and less than lifetime exposures in chronic toxicity testing. These
factors can result in a cumulative UF (uncertainty factor) of 10 to 1000 when
calculating a Lifetime HA.

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                           DRINKING WATER STANDARDS AND HEALTH ADVISORIES
April 1991
Paae 1
Standards Health Advisories
Chemicals

Status MCLG MCL
Reg.* (mg/l) (mg/l)

Status
HA*

10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l

70-ka Adult
Longer- mg/l
term RfD DWEL Lifetime at 10"*
mg/l mg/kg/day mg/l mg/l Cancer
Risk

Cancer
Group

ORGANICS
Acenaphthylene
Acifluorfen
Acrylamide
Acrylonitrile
Adioates (diethvlhexvl)
Alachlor
Aldicarb
Aldicarb sulfone
Aldicarb sulfoxide
Aldrin
Ametryn
Ammonium Sulfamate
Anthracene (PAH)
Atrazine
B • qon
Be, itazon
Benz(a)anthracene (PAH)
Benzene
Benzo(a)pyrene (PAH)
Benzo(b)fluoranthene (PAH)
Benzo(g,h,i)perylene (PAH)
Benzo(k)fluoranthene (PAH)
bis-2-Chloroisopropyl ether
Bromacil
Bromobenzene

F zero TT
L
P 0.5 0.5
F zero 0.002
P 0.001 0.003
P 0.002 0.003
P 0.001 0.003
F 0.003 0.003
P zero 0.0001
F zero 0.005
P zero 0.0002
P zero 0.0002
P zero 0.0002

F
F
D
F
F
F
F
D
F
F
F
F
F
F
F
F
D

2 2 0.1
1.5 0.03 0.02
0.02 0.02 0.001
0.1 0.1
0.0003 0.0003 0.0003
9 9 0.9
20 20 20
0.1 0.1 0.05
0.04 0.04 0.04
0.3 0.3 0.3
0.2 0.2
444
553

0.06
0.4 0.013 0.4 - 0.1
0.07 0.0002 0.007 - 0.001
0.004 0.0001 0.004 - 0.007
0.7 20 0.5
0.01 0.4 - 0.04
0.0002 0.004 0.001 -
0.0003 0.1 0.002 -
0.0002 0.004 0.001 -
0.0003 0.00003 0.001 - 0.0002
3 0.009 0.3 0.06 -
80 0.28 8 2
0.3 - - -
0.2 0.005 0.2 0.003 -
0.1 0.004 0.1 0.003 -
0.9 0.0025 0.09 0.02
0.1
13 0.04 1 0.3
9 0.13 5 0.09 -

B2
B2
B1
C
B2
D
D
D
B2
D
D
D
C
C
D
B2
A
B2*
B2
D
B2
D
C
* Under review
NOTE: Anthracene and Benzo(g,h,i)perylene -- not proposed in Phase V.

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AD 1991 Paae2
Standards Health Advisories
Chemicals
Bromochloroacetonitrile
Bromochloromethane
Bromodichloromethane (THM)
Bromoform (THM)
Bromomethane
Butyl benzyl phthalate (PAE)
Butylate
Butylbenzene n-
Butylbenzene sec-
Butvlbenzene tert-
Carbaryl
Carbofuran
Carbon Tetrachloride
Carboxin
Chloral Hydrate
Chloramben
Chlordane
Chlorodibromomethane (THM)
Chloroethane
Chloroform (THM)
Chloromethane
Chlorophenol (2-)
p-Chlorophenyl methyl
sulfide/sulfone/sulfoxide
Chloropicnn
Chlorothalonil
Chlorotoluene o-
Chlorotoluene p-
Chlorpynfos
Chrysene (PAH)
Cvanazine
Status MCLG MCL
Reg.* (mg/l) (mg/l)
L
0.1
L - 0.1
P 0.1 0.01
F 0.04 0.04
F zero 0.005
L
F zero 0.002
L - 0.1
L
L - 0.1
L
L
D
L
L
L
P zero 0.0002
L
Status
HA*
D
F
D
D
F
F
D
D
D
F
F
F
F
D
F
F
D
D
D
F
D
F
F
F
D
F
10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l
50 1 1
77 4
52 2
0.1 0.1 0.1
2 2 1
1 1 1
0.05 0.05 0.05
4 0.2 0.07
1 1 1
3 3 0.2
0.06 0.06
772
4 4 0.1
9 0.4 0.4
0.05 0.05 0.05
0.2 0.2 0.2
22 2
222
0.03 0.03 0.03
0.1 0.1 0.02
70-ka Adult
Longer- mg/l
term RfD DWEL Lifetime at 10 *
mg/l mg/kg/day mg/l mg/l Cancer
Risk
5 0.013 0.5 0.09
13 0.02 0.6 - 0.03
6 0.02 0.6 - 0.4
0.5 0.001 0.05 0.01
0.2 6 - -
4 0.05 2 0.35
1 0.1 4 0.7
0.2 0.005 0.2 0.04 -
0.3 0.0007 0.03 - 0.03
4 0.1 4 0.7
0.5 0.015 0.5 0.1
0.00006 0.002 - 0.003
8 0.02 0.7 0.02 -
0.5 0.01 0.5 - 0.6
1 0.004 0.1 0.003 -
0.2 0.005 0.2 0.04
0.5 0.015 0.5 - 0.15
7 0.02 0.7 0.1
7 0.02 0.7 0.1
0.1 0.003 0.1 0.02
0.07 0.002* 0.07* 0.01* -
Cancer
Group
B2
B2
D
C
D
D
E
B2
D
D
B2
C
B2
C
D
B2
D
D
D
B2
D*
Under review.
NOTE:  Chrysene was proposed in second option

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April 1991
                                           Page 3
                                     Standards
Health Advisories

Chemicals
Cyanogen Chloride
Cymene p-
2,4-D
DCPA (Dacthal)
Dalaoon
DL -inon
Di^^nz(a,h)anthracene (PAH)
Dibromoacetonitrile
Dibromochloropropane (DBCP)
Dibromomethane
Dibutyl phthalate (PAE)
Dicamba
Dichloroacetaldehyde
Dichloroacetic acid
Dichloroacetonitrile
Dichlorobenzene p-
Dichlorobenzene o-.m-
Dichloroditluoromethane
Dichloroethane (1,1-)
Dichloroethane (1.2-)
Dichloroethylene (1,1-)
Dichloroethylene (cis-1,2-)
Dichloroethylene (trans- 1 ,2-)
Dichloromethane
Dichlorophenol (2.4-)
Dichloropropane (1.1-)
Dichloropropane (1,2-)
Dichloropropane (1 ,3-)
Dichloropropane (2,2-)
Dichloropropene (1.1-)

Status MCLG MCL
Reg.* (mg/l) (mg/Q
L
F 0.07 0.07
P 0.2 0.2
P zero 0.0003
L
F zero 0.0002
L
L
L
L
L
F 0.075 0.075
F 0.6 0.6
L
F zero 0.005
F 0.007 0.007
F 0.07 0.07
F 0.1 0.1
P zero 0.005
L
F zero 0.005
L
L
L

Status
HA*
D
F
F
F
F
D
F
F
D
D
D
F
F
F
D
F
F
F
F
F
D
D
F
D
D
D
10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l
1 0.3 0.1
80 80 5
3 3 0.3
0.02 0.02 0.005
22 2
0.2 0.05
0.3 0.3 0.3
1 1 0.8
10 10 10
99 9
40 40 9
0.7 0.7 0.7
2 1 1
433
20 2 2
10 2
0.03 0.03 0.03
0.09
70-ka Adult
Longer- mg/l
term RfD DWEL Lifetime at104
mg/l mg/kg/day mg/l mg/l Cancer
Risk
0.4 0.01 0.4 0.07
20 0.5 20 4
0.9 0.026 0.9 0.2
0.02 0.00009 0.003 0.0006 -
8 0.02 0.8 0.02
0.003
0.1 4 -
1 0.03 1 0.2
3 0.008 0.3 0.006 -
40 0.1 4 0.075 -
30 0.089 3 0.6
30 0.2 5 1 -
2.6 - 0.04
4 0.009 0.4 0.007 -
11 0.01 0.4 0.07 -
6 0.02 0.6 0.1
0.06 2 - 0.5
0.1 0.003 0.1 0.02 -
0.05

Cancer
Group
D
D
D
E
B2
C
B2
D
D
D
C
C
D
D
B2
C
D
D
B2
D
B2

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April 1991 Paoe4
Standards Health Advisories
Chemicals
Dichloropropene (1,3-)
Dieldrin
Diethyl phthalate (PAE)
Diethylhexyl phthalate (PAE)
Diisoproovl methvlDhosohonate
Dimethrin
Dimethyl methylphosphonate
Dimethyl phthlate (PAE)
1 ,3-Dinitrobenzene
DinKrotoluene (2A-)
2,4-/2,6-Dinitrotoluene
Dinoseb
Dioxane p-
Diphenamid
Diauat
Disulfoton
1,4-Dithiane
Diuron
Endothall
Endrin
Epichlorohydrin
Ethylbenzene
Ethylene dibromide (EDB)
Ethylene glycol
ETU
Fenamiphos
Fluometuron
Fluorene (PAH)
Fluorotrichloromethane
Fog Oil
Status MCLG MCL
Reg.* (mg/l) (mg/l)
L
L
P zero 0.004
L
L
P 0.007 0.007
P 0.02 0.02
P 0.1 0.1
P 0.002 0.002
F zero TT
F 0.7 0.7
F zero 0.00005
— — .
L

Status
HA*
F
F
D
D
F
F
D
F
D
D
F
F
F
F
D
F
F
F
F
F
F
F
F
F
F
F
D
10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l
0.03 0.03 0.03
0.0005 0.0005 0.0005
888
10 10 10
0.04 0.04 0.04
0.3 0.3 0.01
4 0.4
0.3 0.3 0.3
0.01 0.01 0.003
1 1 0.3
0.8 0.8 0.2
0.02 0.02 0.003
0.1 0.1 0.07
30 3 1
0.008 0.008
20 6 6
0.3 0.3 0.1
0.009 0.009 0.005
222
773
70-ka Adult
Longer- mg/l
term RfO DWEL Lifetime at10~*
mg/l mg/kg/day mg/l mg/l Cancer
Risk
0.1 0.0003 0.01 - 0.02
0.002 0.00005 0.002 - 0.0002
0.8 30 5
0.02 0.7 - 0.3
30 0.08 3 0.6
40 0.3 10 2
0.14 0.0001 0.005 0.001 -
0.04 0.001 0.04 0.007 -
0.7
1 0.03 1 0.2
0.0022 0.08 0.02
0.009 0.00004 0.001 0.0003 -
0.9 0.002 0.07 0.01
0.2 0.02 0.7 0.1
0.01 0.0003 0.01 0.002 -
0.07 0.002 0.07 - 0.4
3 0.1 3 0.7
0.00004
20 2 40 7 -
0.4 0.00008 0.003 - 0.006**
0.02 0.00025 0.009 0.002 -
5 0.013 0.4 0.09 -
0.04
10 0.3 10 2
Cancer
Group
82
B2
D
B2*
D
D
D
D
-
B2
D
62
D
D
E
D
D
D
B2
D
B2
D
B2
D
D
D
D
Under review.
Not verified yet.

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April 1991
                                     Standards
Health Advisories
                                           Paces

Chemicals
Fonofos
Formaldehyde
Gasoline, unleaded (benzene)
Glyphosate
Heotachlor
Heptachlor epoxide
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclopentadiene
Hexachloroethane
Hexane (n-)
Hexazinone
HMX
Hypochlorite
Hvoochlorous acid
lndeno(1,2,3,-c,d)pyrene (PAH)
Isophorone
Isopropyl methylphosphonate
Isopropylbenzene
Lindane
Malathion
Maleic hydrazide
MCPA
Methomyl
Methoxychlor
Methyl ethyl ketone
Methyl parathion
Methyl ten butyl ether
Metolachlor
Metribuzin

Status MCLG MCL
Reg.* (mg/l) (mg/l)
P 0.7 0.7
F zero 0.0004
F zero 0.0002
P zero 0.001
P 0.05 0.05
L
L
P zero 0.0004
L
F 2E-4 0.0002
F 0.04 0.04
L
L
L
L

Status
HA*
F
D
D
F
F
F
F
F
F
F
F
F
D
D
D
D
F
D
F
F
F
F
F
F
D
F
F
10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l
0.02 0.02 0.02
10 5 5
20 20 1
0.01 0.01 0.005
0.01 - 0.0001
0.05 0.05 0.05
0.3 0.3 0.1
5 5 0.1
10 4 4
333
555
15 15 15
1 1 0.03
0.2 0.2 0.2
10 10 5
0.1 0.1 0.1
0.3 0.3 0.3
6 2 0.5
80 8 3
0.3 0.3 0.03
3 3 0.5
222
5 5 0.3
70-ka Adult
Longer- mg/l
term RfD DWEL Lifetime at 10 *
mg/l mg/kg/day mg/l mg/l Cancer
Risk
0.07 0.002 0.07 0.01
20 0.15 5 1
0.005 -
1 0.1 4 0.7
0.005 0.0005 0.02 - 0.0008
0.0001 1.3E-05 0.0004 - 0.0004
0.2 0.0008 0.03 - 0.002
0.4 0.002 0.07 0.001 -
0.007 0.2
0.5 0.001 0.04 0.001 -
10 -
9 0.033 1 0.2
20 0.05 2 0.4
15 0.2 7 0.1
0.1 0.0003 0.01 0.0002 -
0.8 0.02 0.8 0.2
20 0.5 20 4
0.4 0.0015 0.05 0.01
0.3 0.025 0.9 0.2
0.2 0.005 0.2 0.04
9 0.00005 0.9 0.2
0.1 0.00025 0.009 0.002 -
2 0.005 0.2 0.04
5 0.15 5 0.1
0.9 0.025 0.9 0.2

Cancer
Group
D
B1
0
B2
B2
B2
C
D
C
D
D
D
B2
C
D
C
D
D
E
D
D
D
D
D
C
D

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April 1991
                                                                                                       Page 6
                                     Standards
                                                            Health Advisories

Chemicals
Monochloroacetic acid
Monochlorobenzene
Naphthalene
Nitrocellulose (non-toxic)
Nitroquanidine
Nitrophenols p-
Oxamyl (Vydate)
Ozone by-products
Paraquat
Pentachloroethane
Pentachlorophenol
Phenanthrene (PAH)
Phenol
Picloram
Polychlonnated bvohenvls (RGBs)
Prometon
Pronamide
Propachlor
Propazine
ProDham
Propylbenzene n-
Pyrene (PAH)
RDX
Simazine
Stvrene
2.4,5-T
2.3,7,8-TCDD (Dioxm)
Tebuthiuron
Terbacil
Terbufos

Status MCLG MCL
Reg.* (mg/l) (mg/l)
L
F 0.1 0.1
P 0.2 0.2
L
P zero 0.001
P 0.5 0.5
F zero 0.0005

P 0.001 0.001
F 0.1 0.1
L
P zero 5E-08

Status
HA*
D
F
F
F
F
D
F
F
D
F
D
F
P
F
F
F
F
F
D
F
F
F
F
F
F
F
F
10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l
222
0.5 0.5 0.4
10 10 10
0.8 0.8 0.8
0.2 0.2 0.2
0.1 0.1 0.05
1 0.3 0.3
666
20 20 0.7
0.2 0.2 0.2
0.8 0.8 0.8
0.5 0.5 0.1
1 1 0.5
555
0.1 0.1 0.1
0.5 0.5 0.05
20 2 2
0.8 0.8 0.8
1E-06 1E-07 1E-08
3 3 0.7
0.3 0.3 0.3
0.005 0.005 0.001
70-ka Adult
Longer- mg/l
term RfD DWEL Lifetime at 10'*
mg/l mg/kg/day mg/l mg/l Cancer
Risk
7 0.02 0.7 0.1
1 0.004 0.1 0.02
40 0.1 4 0.7
3 0.008 0.3 0.06
0.9 0.025 0.9 0.2
0.2 0.0045 0.2 0.03
1 0.03 1 - 0.03
20 0.6 20 4
2 0.07 2 0.5
0.0005
0.5 0.015 0.5 0.1
3 0.075 3 0.05
0.5 0.013 0.5 0.09
2 0.02 0.7 0.01
20 0.02 0.6 0.1
0.03
0.4 0.003 0.1 0.002 0.03
0.2 0.002 0.06 0.001 -
7 0.2 7 0.1
1 0.01 0.35 0.07
4E-08 1E-06 4E-08 - 2E-08
2 0.07 2 0.5
0.9 0.013 0.4 0.09
0.005 0.00013 0.005 0.0009 -

Cancer
Group
D
D
D
D
E
E
B2
D
D
B2
D
C
D
C
D
D
C
C
C
D
B2
D
E
D
* Under review.
NOTE:  Phenanthrene -- not proposed

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April 1991
                                           Page?
                                     Standards
Health Advisories

Chemicals
Tetrachloroethane (1 , 1 , 1 ,2-)
Teirachloroethane (1.1,2,2-)
Tetrachloroethylene
Toluene
Toxaohene
2,4,5-TP
1.1.2-Trichloro-1,2,2-
tnfluoroethane
Trichloroacetic acid
Trichloroactonitrile
Trichlorobenzene (1,2,4-1
Tnchlorobenzene (1,3,5-)
Trichloroethane <1,1,1-)
Trichloroethane (1,1,2-)
Trichloroethanol (2,2,2-)
Trichloroethvlene
Trichlorophenol (2,4,6-)
Tnchloropropane (1,1,1-)
Tnchloropropane (1,2,3-)
Trifluralm
Trimelhvlbenzene (1,2,4-)
Tnmethylbenzene (1,3,5-)
Tnnitroglycerol
Trinitrotoluene
Vinyl chloride
White phosphorus
Xvlenes

Status MCLG MCL
Reg.* (mg/l) (rng/l)
L
L
F zero 0.005
F 1 1
F zero 0.005*
F 0.05 0.05
L
L
P 0.009 0.009
F 0.2 0.2
P 0.003 0.005
L
F zero 0.005
L
L
F zero 0.002
F 10 10

Status
HA*
F
D
F
F
F
F
D
D
F
F
F
F
F
O
0
F
F
D
0
F
F
F
F
F
10-ko Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l
2 2 0.9
2 2 1
20 2 2
0.5 0.04
0.2 0.2 0.07
0.05 0.05
0.1 0.1 0.1
0.6 0.6 0.6
100 40 40
0.6 0.4 0.4
0.6 0.6 0.6
0.08 0.08 0.08
0.005 0.005 0.005
0.02 0.02 0.02
3 3 0.01
40 40 40
70-ka Adult
Longer- mg/l
term RfD DWEL Lifetime at 10 4
mg/l mg/kg/day mg/l mg/l Cancer
Risk
3 0.03 1 0.07 0.1
5 0.01 0.5 - 0.07
7 0.2 7 1 -
0.1 0.0035 - 0.003
0.3 0.0075 0.3 0.05
• •_ - — —
0.5 0.001 0.05 0.009 -
2 0.006 0.2 0.04
100 0.035 1 0.2
1 0.004 0.1 0.003 -
0.007 0.3 - 0.3
0.3
2 0.006 0.2 0.04
0.3 0.0075 0.3 0.005 -
0.005 - - 0.005 -
0.02 0.0005 0.02 0.002 0.1
0.05 - - - 0.0015
0.00002 0.0005 0.0001 -
100 2 60 10 -

Cancer
Group
C
B2
D
82
D
D
D
D
C
B2
B2
C
C
A
D
D
  Under review.

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April 1991



Chemicals

INORGANICS
Aluminum
Ammonia
Antimony
Arsenic
Asbestos (fibers/I > 1 Ourrrt
Barium
Beryllium
Boron
Cadmium
Chloramine
Chlorate
Chlorine
Chlorine dioxide
Chlorite
Chromium (total)
Copper
Cyanide
Fluoride*
Lead (at source)
Lead (at tap)
Manganese
Mercury
Mol denum
Nickel
Nitrate (as N)

Standards


Status MCLG MCL
Reg.* (mg/l) (mg/l)


L
L
P 0.0030.01/0.005
* - 0.05
F 7MFL7MFL
P 2 2
P zero 0.001
L
F 0.005 0.005
L
L
L
L
L
F 0.1 0.1
P 1.3 1.3
P 0.2 0.2
F 4 4
P zero 0.005*
P zero TT*
.
F 0.002 0.002
L
P 0.1 0.1
F 10 10




Status
HA*


D
D
D
D

F
D
D
F
D
D
D
D
D
F
.
F



D
F
D
F
F

Health
10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l



- -
0.015 0.015 0.015
-
-
-
30 30 4
4 0.9 0.9
0.04 0.04 0.005


-
-

1 1 0.2
-
0.2 0.2 0.2
-
- -
-
.
-
0.08 0.08 0.01
1 1 0.1
10*
Pa
Advisories 	
70-ka Adult
Longer- mg/l
term RfD DWEL Lifetime at 10 *
mg/l mg/kg/day mg/l mg/l Cancer
Risk


30
0.015 0.0004 0.015 0.003 -
0.003
700 MFL
0.07 2 2
20 0.005 0.2 - 0.0008
3 0.09 3 0.6
0.02 0.0005 0.02 0.005 -
-
-
.
-
™

0.8 0.005 0.2 0.1

0.8 0.022 0.8 0.2
0.06

-
0.14
0.002 0.0003 0.01 0.002 -
0.05 0.001 0.05 0.05
0.6 0.02 0.6 0.1
1.6 -
ge 8


Cancer
Group



D
D
A
A
D
B2
D
D





n
D
D

B2
B?

D
D
D
	 D
Under review.

-------
April 1991
                                    Standards
Health Advisories
                                                                                                                       Page 9
Chemicals
Nitrite (as N)
Status MCLG MCL
Reg.* (mg/l) (mg/l)
F 1 1
Status
HA*
F
10-ka Child
Longer-
One-day Ten-day term
mg/l mg/l mg/l
1*
70-ka Adult
Longer- mg/l
term FtfD DWEL Lifetime at 10'*
mg/l mg/kg/day mg/l mg/l Cancer
Risk
0.16*
Cancer
Group
D
Nitrite (as N)
Nitrate + Nitrite (both as N)
Selenium
Silver
Sodium
Strontium
Sulfate
Thallium
Vanadium
Zinc
Zinc chloride
F 1 1
F 10 10
F 0.05 0.05
L
L
L
P 400/500400/500
P 0.0005 0.002/
0.001
L
L
F
D
D
D
D
D
D
D
1*
0.2 0.2 0.2
25 25 25
0.007 0.007 0.007
0.08 0.08 0.03
442
0.16*
0.005
0.2 0.005 0.2 0.1
20***
90 2.5 90 17
0.02 0.00007 0.002 0.0004 -
0.11 0.003 0.11 0.02
9 0.2 9 2 -
D
D
0
D
D
RADIONUCLIDES
Beta particle and photon
activity (formerly
man-made radionuclides)
Gross alpha particle activity
Radium 226/228
Radon
Uranium


I F
I F
I F
I T
I T


zero 4 mrem | - |
zerol 5 pCi/L j - j
zero 5 pCi/L | - |
zero - I - I
zero I - I


I - - - - 4 mrem/y |
- I 	 I
I - - - - 22/34 pCi/l |
I - - - - 150pCi/l |
- | .... 170DCJ/I I


A
A
A
A
A
 * Under review.
*** Guidance.

-------
           SECONDARY MAXIMUM CONTAMINANT LEVELS
April 1991
     Chemicals
            Page 10
Status
SMCLs
fmq/l)
Aluminum
Chloride
Color
Copper
Corrosivitv
Fluoride*
Foaming Agents
Hexachlorocyclopentadiene
Iron
Manganese
Odor
PH
Silver
Sulfate
Toluene
Total Dissolved Solids (TD)
Zinc
F
F
F
F
F
F
F
F
F
F
F
F
F
P
F
F
0.05 to 0.2
250
15 color units
1
non-corrosive
2
0.5
0.008
0.3
0.05
3 threshold odor numbers
6.5 - 8.5
0.10
250
-
500
5
Status Codes:  P - proposed, F - final

* Under review.

-------
MICROBIOLOGY
Status MCLG MCL
Cryptosporidium
Giardia lamblia
Legionella
Standard Plate Count
Total Conforms (after 12/31/90)
Turbidity (after 12/31/90)
Viruses
L
F
FB
FB
F
F
FB
-
zero TT
zero TT
NA TT
zero **
NA PS
zero TT
Key:     PS. TT. F. defined as previously stated.



  :       Final for systems using surface water; also being considered for regulation under groundwater disinfection rule.

-------