Drinking Water Regulations and Health Advisories


DRINKING WATER REGULATIONS
                              •

    AND HEALTH ADVISORIES
                  by
             Office of Water
     U.S. Environmental Protection Agency
            Washington, D.C.
              202-260-7571
      SAFE DRINKING WATER HOTLINE
             1-800-426-4791
  Monday thru Friday, 8:30 AM to 5:00 PM EST
              October 1991

-------
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 NTU
TT - 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
October 1991
                                  Page 1
                              Standards
Health Advisories

Chemicals
ORGANICS
Acenaphthylene
Acifluorfen
Acrylamide
Acrylonitrile
Adipates (diethylhexyl)
Alachlor
Aldicarb
Aldicarb sulfone
Aldicarb sulfoxide
Aldrin
Ametryn
Ammonium Sutfamate
Anthracene (PAH)
Atrazine
Bavqon
Bentazon
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

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

F zero TT
L
P 0.5 0.5
F zero 0.002
P 0.001 0.003
P 0.001 0.002
P 0.001 0.004
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

Status
HA*

F
F
D
F
F
F
F
D
F
F
F
F
F
F
F
F
D
10-kq Child
Longer-
| One-day Ten-day term
j mg/l mg/l mg/l

2 2 0.1
1.5 0.3 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
44 4
553
70-kq Adult
Longer- mg/l
term RfD DWEL Lifetime at KT1
mg/l mg/kg/day mg/l mg/l Cancer
Risk

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 -
0.002 0.004 0.001 -
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

Cancer
Group

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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Octobor 1991
                                                                                                          Page 2
                                      Standards
                                                              Health Advisories

Chemicals
Bromochloroscetonitrile
Bromochloromethane
Bromodichloromelhane (THM)
Bromolorm (THM)
Bromomethatie
Butyl benzyl phthalale (PAE)
Butylate
Butylbenzene n-
Butylbenzene sec-
Butvlbenzene teri-
Carbaryl
Carbofuran
Carbon Tetra chic ride
Carboxin
Chloral Hydrate
Chloramben
Chlordane
Chlorodibromomethane (THM)
Chloroethane
Chloroform (THM)
Chloromethane
Chlorophenol (2-)
p-Chlorophenyl methyl
sullide/suilone/sulloxide
Chloropicrin
Chlorothalonil
Chlorotoluene o-
Chlorotoluone p-
Chlorpyrifos
Chrysene (PAH)
Cyanazine

Status MCLG MCL
Reg.* (mg/l) (mg/l)
L
0.1
L - 0.1
P 0.1 0.1
F 0.04 0.04
F zero 0.005
L
F zero 0.002
L - 0.1
L
L - 0.1
L
L
L
L
L
P zero 0.0002
L

Status
HA*
0
F
D
D
F
F
D
D
D
F
F
F
F
0
F
F
D
D
D
F
D
D
F
F
F
D
F
10-kq Child
Longer-
| One-day Ten-day term
j mg/l mg/l mg/l
50 1 1
774
5 2.2
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
7 1.4 0.10
3 3 0.2
0.06 0.06
77 2
4 4 0.1
9 0.4 0.4
0.05 0.05 0.05
0.2 0.2 0.2
22 2
22 2
0.03 0.03 0.03
0.1 0.1 0.02
70-kq 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 -
0.56 0.0016 0.056 0.045 -
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* 0.001 -

Canc<
Grou|
B2
B2
D
C
D
D
E
B2
D
D
B2
C
B2
C
D
.-
B2
D
D
D
B2
C
 Under review.
NOTE:  Chrysene was proposed in second option.

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October 1991
                                           Page 3
                                      Standards
Health Advisories

Chemicals
Cyanogen Chloride
Cymene p-
2.4-D
l)CPA(Oacthal)
Dalapon
Di|2-ethylhexyljadipate
Diazinon
Dibenz(a,h)anlhracene (PAH)
Dibromoacetonilrile
Dibromochloropropane (DBCP)
Dibromomelhane
Dibutyl phthalate (PAE)
Dioamba
Dichloroacetaldehyde
Dichloroacetic acid
Dichloroacetonilrile
Dichlorobenzene p-
Dichlorobenzene o-,m-
Dichlorodifluoromelhane
Dichloroethane (1.1-)
Dichloroelhane (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-)

Status MCLG MCL
Reg.* (mg/l) (mg/l)
L
F 0.07 0.07
P 0.2 0.2
P 0.4 0.4
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

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
10-kq 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
20 20 20
0.02 0.02 0.005
222
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
43 3
20 2 2
10 2
0.03 0.03 0.03
0.09
70-kq Adult
Longer- mg/l
term RfD DWEL Lifetime at 10^
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
60 0.6 20 0.4 3
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 0.9 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

Cancc
Grou)
D
D
D
C
E
B2
C
B2
D
D
D
C
C
D
D
B2
C
D
D
B2
D
B2

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Octobor 1991
                                                                                                            Page 4
                                       Standards
                                                               Health Advisories

Chemicals
Dichloropropene (1,1-)
Dichloropropene (1,3-)
Dieldrin
Diethyl phthalate |PAE)
Diethylene glycol
dinitrate (DENGDN)
Diethylhexyl phthalate (PAE)
Diisopropyl methylphosphonate
Dimethrin
Dimethyl methylphosphonate
Dimethyl phthlate (PAE)
1 ,3-Dinitrobenzene
Dinitrotoluene (2,4-)
Dinitrotoluene (2,15)
2,4-/2.6-Dinitrotoluene
Dinoseb
Dioxane p-
Diphenamid
Diquat
Disulfoton
1 ,4-Dithiane
Diuron
Endothall
Endrin
Epichlorohydrin
Ethvlbenzeno
Ethylene dibromide (EDB)
Elhylene glycol
ETLI
Fenamiphos
Fluometuron

Status MCLG MCL
Reg.* (mg/l) (mg/l)
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*
D
F
F
D
D
D
F
F
D
F
D
D
D
F
F
F
F
D
F
F
F
F
F
F
F
F
F
F
10-kq Child
Longer-
| One-day Ten-day term
j mg/l mg/l mg/l
0.03 0.03 0.03
0.0005 0.0005 0.0005
88 8
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
70-kq Adult
Longer- mg/l
term RfD DWEL Lifetime at 10^
mg/l mg/kg/day mg/l mg/l Cnncer
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
0.2 - - -
0.14 0.0001 0.005 0.001 -
0.2 - -
0.1 - - -
.
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

Cane*
Grouj
•
B2
B2
D
B2*
D
D
D
D
82
B2
B2
D
B2
D
D
E
D
D
D
B2
D
B2
D
B2
D
D
* Under review.
Not verified yet.

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October 1991
                                           Page 5
                                      Standards
Health Advisories

Chemicals
Fluorene (PAH)
Fluorotrichloromethane
Fog Oil
Fonofos
Formaldehyde
Gasoline, unleaded (benzene)
Glyphosate
Heptachlor
Heptachlor epoxide
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclopenladiene
Hexachloroethane
Hexane (n-)
Hexazinone
HMX
Hypochlorite
Hypochlorous acid
lndeno(1 ,2.3.-c,d)pyrene (PAH)
Isophorone
Isopropyl methylphosphonate
Isopropylbenzene
Lindane
Malathion
Maleic hydrazide
MCPA
Methomyl
Melhoxychlor
Methyl ethyl ketone
Melhyl parathion

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

Status
HA*
F
D
F
D
D
F
F
F
F
F
F
F
F
F
_
D
D
D
D
F
D
F
F
F
F
F
F
10-kq Child
Longer-
| One-day Ten-day term
| mg/l mg/l mg/l
773
0.02 0.02 0.02
10 55
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
70-kq Adult
Longer- mg/l
term RfD DWEL Lifetime nt KT*
mg/l mg/kg/day mg/l mg/l Cancer
Risk
0.04
10 0.3 10 2
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 - -
0.1 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 -

Cancer
Group
D
D
D
B1
D
B2
B2
B2
C
D
C
U
D
D
B2 '
C
D
C
D
D
E
D
D
D
D

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October 1991
                                                                                                           Page 6
                                      Standards
                                                               Health Advisories

Chemicals
Methyl tert butyl ether
Metolachlor
Melribuzin
Monochloroacetie acid
Monochlorobenzcne
Naphthalene
Nitrocellulose (ncn-toxic)
Nitroguanidine
Nitrophenols p-
Oxamyl (Vydate)
Ozone by-products
Paraquat
Penlachloroethane
Penlachlorophen ol
Phenanthrene (P/\H)
Phenol
Picloram
Polychlorinated byphenyls (PCBs)
Prometon
Pronamide
Propachlor "
Propazine
Propham
Propylbenzene n-
Pvrene (PAH)
RDX
Simazine
Styrene
2.4.5-T
2.3.7.8-TCDD (Oioxin)

Status MCLG MCL
Reg.* (mg/l) (mg/l)
L
L
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 0.004 0.04
F 0.1 0.1
L -
P zero 5E-08

Status
HA*
D
F
F
D
F
F
F
F
D
F
F
D
F
D
F
P
F
F
F
F
F
D
F
F
F
F
F
10-kq Child
Longer-
| One-day Ten-day term
| mg/l mg/l mg/l
3 3 0.5
222
5 5 0.3
2 2 2
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
66 6
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
0.07 0.07 0.07
20 2 2
0.8 0.8 0.8
1E-06 1E-07 1E-08
70-kq Adult
Longer- mg/l
term RfD DWEL Lifetime at KT*
mg/l mg/kg/day mg/l mg/l Cancer
Risk
2 0.005 0.2 0.04
5 0.15 5 0.1
0.9 0.025 0.9 0.2
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 O.G 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
0.07 0.005 0.2 0.004 -
7 0.2 7 0.1
1 0.01 0.35 0.07
4E-08 1E-06 4E-08 - 2E-08

Cane
Grou
D
C
D
D
D
D
D
E
E
B2
D
D
B2
D
C
D
C
D
D
C
C
C
D
B2
  Under review.
NOTE:  Pherumthrene -- not proposed.

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October 1991
                                            Page 7
                                       Standards
Health Advisories

Chemicals
Tebuthiuron
Terhacil
Terbulos
Tetrachloroethane (1.1,1.2-)
Telrachloroethane (1.1 .2.2-)
Tetrachloroethylene
Tetranitromethane
Toluene
Toxaphene
2,4.5-TP
1,1,2-Trichloro-1.2.2-
trifluoroelhane
Trichloroacelic acid
Trichloroactonitrile
Trichlorobenzene (1 ,2,4-)
Trichlorobenzene (1.3.5-)
Trichloroelhane (1,1,1-)
Trichloroethane (1,1,2-)
Trichloroethanol (2.2,2-)
Trichloroethylene
Trichlorophenol (2.4.6-)
Trichloropropane (1,1,1-)
Trichloropropane (1,2,3-)
Trilluralin
Trimethylbenzene (1 ,2,4-)
Trimethylbenzene (1,3,5-)
Trinilroglycerol
Trinitrotoluene
Vinyl chloride
White phosphorus
Xylenes

Status MCLG MCL
Reg.* (mg/l) (mg/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
F
F
F
D
F
D
F
F
F
D
D
F
F
F
F
F
D
D
F
F
D
D
F
F
F
F
F
10-kq Child
Longer-
| One-day Ten-day term
j mg/l mg/l mg/l
3 3 0.7
0.3 0.3 0.3
0.005 0.005 0.001
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-kq Adult
Longer- mg/l
term RfD DWEL Lifetime ot 104
mg/l mg/kg/day mg/l mg/l Cancer
Risk
2 0.07 2 0.5
0.9 0.013 0.4 0.09
0.005 0.00013 0.005 0.0009 -
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 -
0.3 - 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
D
E
D
C
B2
D
B2
D
D
D
D
C
B2
B2
C
C
A
D
D
* Under review.

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October 1991
                                            Page 8
                                      Standards
Health Advisories

Chemicals
INORGANICS
Aluminum
Ammonia
Antimony
Arsenic
Asbestos (fibors/l > 10um)
Barium
Beryllium
Boron
Cadmium
Chloramine
Chlorate
Chlorine
Chlorine dioxide
Chlorite
Chromium (total)
Copper
Cyanide
Fluoride*
Lead (at source)
Lead (at tap)
Manganese
Mercury
Molybdenum
Nickel
Nitrate (as N)

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

L
L
P 0.0030.01/0.005
* - 0.05
F 7 MFL 7 MFL
F 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
F zero 0.005
F 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
10-kq Child
Longer-
| One-day Ten-day term
j 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 1


.
.
1 1 0.2
0.2 0.2 0.2

_
0.08 0.08 0.01
1 1 0.1
10*
70-kq 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 -
1 0.1 3.3 2.6
.
.
.
.
0.8 0.005 0.2 0.1
0.8 0.022 0.8 0.2
0.12
...
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 - -

Canci
Grou


D
D
A
A
D
B2
D
D
.
-
-
-
-
D
D
D
B2
82
D
D
D
t
* Under review.

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October 1991
                                            Page 9
                                       Standards
Health Advisories

Chemicals
Nitrite (as N)
Nitrate + Nitrite (both as N)
Selenium
Silver
Sodium
Strontium
Sulfate
Thallium
Vanadium
Zinc
Zinc chloride

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

Status
HA*
F
F
D
D
D
D
D
D
D
10-kq Child
Longer-
| One-day Ten-day term
| mg/l mg/l mg/l
•
1*
0.2 0.2 0.2
25 25 25
0.007 0.007 0.007
0.08 0.08 0.03
44 2
70-kq Adult
Longer- mg/l
term RfD DWEL Lifetime at 10^
mg/l mg/kg/day mg/l mg/l Cancer
Risk
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 -

Cancer
Group
*
*
D
D
D
D
RADIONUCLIDES

 Beta particle and photon
  activity (formerly
man-made radionuclides)
Gross alpha particle activity
Radium 226/228
Radon
Uranium
| F zero 4 mrem | - |
| F zero15pCi/L I - I
| F zero 5 pCi/L | - j
| T zero - | - |
I T zero - I - I
| - - 4 mrem/y |
.-I 	 I
| - - 22/26 pCi/l |
| - - 150pCi/l |
I - - 170oCi/l I
A
A
A
A
A
   Under review.
    Guidance.

-------
                 SECONDARY MAXIMUM CONTAMINANT LEVELS
April 1991
          Page 10
     Chemicals
Status
SMCLs
(mq/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
1 5 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
Cryptosporidium
Giardia lamblia
Legionella
Standard Plate Count
Total Conforms (after 12/31/90)
Turbidity (after 12/31/90)
Viruses
L
F
F"
Fn
F
F
Ffl
MCLG MCL
-
zero
zero
NA
zero
NA
zero
-
TT
TT
TT
**
PS
TT
Key:    PS, TT, F, defined as previously stated.



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

-------