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
               April 1992
                              Printed on Recycled Paper

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LEGEND
Abbreviations column descriotions 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.
ftf Q - 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.
(1 The codes for the Status Rea and Status HA columns are as follows:
E - final
Q - draft
L - listed for regulation
- proposed (Phase II and V proposals)
I - tentative
Other codes found in the table include the following:
- not applicable
- performance standard 0.5 NTU - 1.0 NTU
fl - 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.
Chemical abbreviations include the following:
PAH - polycyclic aromated hydrocarbon
EDB - ethylene dibromide
- phthatate acid ester
PCBs - polychlorinated biphenyls
THM - trihalomethane
DBCP - dibromochloropropane

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DRINKING WATER STANDARDS AND HEALTH ADVISORIES
April1992 Paael
W Ith A sir .
Chemicals
1 0-kg Child I 70-kg Adult I
Longer- Longer- mgI l
Status MCLG MCL Status One-day Ten-day term term RfD DWEL Lifetime at 1 o
Reg. ’ (mg/I) (mg/I) HA’ I mg/I mg/I mg/I mg/I mg/kg/day mg/I mg/I Cancer
I Risk
Cancer
Group
I____
I
ORGANICS
Acenaphthene - - - I - I - - - - 0.06 - - -
Acifluorfen 1 - - - P 2 2 0.1 0.4 0.013 0.4 - 0.1 I B2
Acrylamide F zero TI F 1.5 0.3 0.02 0.07 0.0002 0.007 - 0.001 B2
Acry lonitrile I - - D 0.02 0.02 0.001 0.004 0.0001 0.004 - 0.007 Bi
AdiDates (diethylhexyl) P 0.5 0.5 - - - - 0.7 20 0.5 -
Alach ior I F zero 0.002 F 0.1 0.1 - I - 0.01 0.4 - 0.04 ( 82
Aldicarb F 0.001 0.003 F - - - - 0.0002 0.004 0.001 - I D
Aldicarb sulfone F 0.001 0.002 F - - - - 0.0002 0.004 0.001 - D
Aidicarb sulfoxide F 0.001 0.004 F - - - - 0.0002 0.004 0.001 - 0
Aldrin - - - - j D 0.0003 0.0003 0.0003 0.0003 0.00003 0.001 - 0.0002 L&Z
Ametryn - - - F 9 9 0.9 3 0.009 0.3 0.06 - D
Ammonium Sulfamate - - - F 20 20 20 80 0.28 8 2 - 0
Anthracene (PAH) - • - I - - - - I - 0.3 - - - f D
Atrazine F 0.003 0.003 j F 0.1 0.1 0.05 0.2 0.005 0.2 0.003 - j C
Baypon - - F 0.04 0.04 0.04 0.1 0.004 0.1 0.003 - C
Bentazon I - J F 0.3 . 0.3 0.3 0.9 0.0025 0.09 0.02 D
Benz(a)anthrapene (PAH) P zero 0.0001 I - - - - - - - B2
Benzene F zero 0.005 F 0.2 0.2 - - - - - 0.1 A
Benzo(a)pyrene (PAH) P zero 0.0002 - - - - - - - - B2
Benzo(b)fluorpnthene (PAH) P zero 0.0002 - - - - - - -
Benzo(g,h,i)perylene (PAH)
Benzo(k)fluoranthene (PAH)
bis-2-Chtoroisopropyl ether
Bromacil
Bromobenzene
- - -
P zero 0.0002 -
- - F
I - - F
L L - - [ D
- - -
- - -
4 4 4
5 5 3
- - -
- - - -
- - - -
13 0.04 1 0.3 -
9 0.13 5 0.09 -
- - - - -
D
82
D
C
.
* Under review.
NOTE: Anthracene and Benzo(g,h,i)perylene -- not proposed in Phase V.
CHANGES FROM THE LAST VERSION ARE NOTED IN ITALIC AND BOLD FACE PRIr

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Anril 1992
P nn 2
Bromochioroacetonitrile
Bromochioromethane
Bromodichloromethane (THM)
Bromoform (THM)
Bromomethane
I L - - D
- - F
L - 0.1 D
L - 0.1 D
L - - F
- - -
50 1 1
7 7 4
f 5 2 2
0.1 0.1 0.1
- - - - - - -
5 0.013 0.5 0.09 -
I 13 0.02 0.7 - 0.14
6 0.02 0.7 - 0.4
0.5 0.001 0.05 0.01
-
-
B2
B2
D
Butyl benzy phthalate (PAE)
Butylate
Butylbenzene n-
Butylbenzene sec-
Butylbenzene tert-
P zero 0.1
- - -
- - -
I - - -
- - -
-
F
D
D
D
- - - 0.2 6 - - C
2 2 1 I 4 0.05 2 0.35 D
- - . - - - - -
- - - - - - - - -
- - - - - - - - -
1 1 1 1 0.1 4 0.7 D
0.05 0.05 0.05 0.2 0.005 0.2 0.04 - E
4 0.2 0.07 0.3 0.0007 0.03 - 0.03 82
1 1 1 4 0.1 4 0.7 D
7 1.4 0.16 0.56 0.0016 0.056 0.045 - L.......
Carbaryl
Carbofuran
Carbon Tetrachloride
Carboxin
Chloral Hydrate
- - -
F 0.04 0.04
F zero 0.005
I - - -
L - -
F
F
F j
F
D
Chioramben
Chiordane
Chiorodibromomethane (THM)
Chioroethane
Chloroform (THM)
I - - -
F zero 0.002
L - 0.1
L - -
I - 0.1
F I
F
D
0 f
0
3 3 0.2
0.06 0.06 -
7 7 2
- - -
4 4 0.1
0.5 0.015 0.5 0.1 -
- 0.00006 0.002 - 0.003
8 0.02 0.7 0.06 -
- - - -
0.4 0.01 0.4 - 0.6
D
B2
C
82
Chloromethane
Chiorophenol (2-)
p-Chiorophenyl methyl I
sulfide/suit one/suif oxide
Chioropicrin
Chlorothalonii J.
L - - F 9 0.4 0.4
- - - D 0.05 0.05 0.05
I I
- - D - - -
L - - - - -
- - - F 0.2 0.2 0.2 1
1 0.004 0.1 0.003 -
0.2 0.005 0.2 0.04 -
- - - -
- - - -
0.5 0.015 0.5 - 0.15
C
D
o
.
82
Chiorotoluene 0-
Chiorotoluene p-
Chiorpyrifos
Chrysene (PAH)
Cyanazine
L - - F 2 2 2 7 0.02 0.7 0.1 - I
I - - F 2 2 2 7 0.02 0.7 0.1 -
- - - I D 0.03 0.03 0.03 0.1 0.003 0.1 0.02 - I
P zero 0.0002 I - - - - I - - - I
L - - I F 0.1 0.1 0.02 I 0.07 0.002 0.07 0.001 - I
D
D
D
82

Chemicals
Standards — Health Advisories
Status MCIG MCI
Reg.* (mg/I) (mg/I)
1 0-ko Child 70-ka Adult
Longer-
Status I One-day Ten-day term
HA* mg/I mg/I mg/i
Longer-
term
mg/I
RfD DWEL Ufetime
mg/kg/day mg/i
mg/I
mg/i
at 106
Cancer
Risk
Cancer
Group
Under review.
NOTE: Chrysene was proposed in second option.

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AorR 1992
U I.k
Chemicals
I
Status MCLG MCL
Reg. ’ (mg/I) (mg/I)
10-kg Child
I Longer-
Status I One-day Ten-day term
HA’ I mg/I mg/i mg/I
70-kg Adult
Cancer
Group
Longer- mg/I
term RfD DWEL Ufetime at I 0.4
mg/I mg/kg/day mg/i mg/I Cancer I
Risk
Cyanogen Chloride
Cymenep-
2,4-D
DCPA (Dacthal)
Dalaøon
L - -
- - -
F 0.07 0.07
I - -
P 0.2 0.2
-
D I
F
F I
F
- - -
- - -
1 0.3 0.1
80 80 5
3 3 0.3
. -
- - - - -
0.4 0.01 0.4 0.07 -
20 0.5 20 4 -
0.9 0.026 0.9 0.2 -
20 0.4 3
.
D
0
D
C
E
B2
C

D
D
D
.
-
C
D
0
C
0
B2
C
D
D
82
D
-
B2
-
L
Di [ 2-ethylhexyfladiPate P 0.4 0.4
Diazinon - - -
Dibenz(a,h)anthraCefle (PAH) P zero 0.0003
DibromoacetOnitrile L - - I
DibrpmochloroorOOafle (DBCPI F zero 0.0002
Dibromomethafle L - -
Dibutyl phthalate (PAE) - - -
Dicamba I - -
Dichioroacetaldehyde L - -
Dichiproacetic acid I - -
- 20 20 20
F 0.02 0.02 0.005
- - - -
D 2 2 2
F J 0.2 0.05 -
60
0.02 0.00009 0.003 0.0006 -
- - - - -
8 0.02 0.8 0.02 -
- - - - 0.003
- I - - -
- - - -
F 0.3 0.3 0.3
D - - -
D - -
- - - -
- 0.1 4
1 0.03 1 0.2 -
- - - - -
- - - - -
0.3 0.006 -
Dichioroacetonitrile
Dkh!oa’obenzefle o-
Dichlorobenzefle in- *
Dichlorobenzene p-
Dichiorodifluoromethafle
Dichloroethahe (1 .1-)
I L -
F 0.6 0.6
F 0.6 Gb
F 0.075 0.075
I - -
1 - -
I D
F
F
F
F
D
1 1 0.8 I 3 0.008
I . 9 9 I 30 0.9 3 0.6 -
9 9 9 30 0.9 3 0.6 -
10 10 10 40 0.1 4 0.075 -
40 40 9 30 0.2 5 1 -
- - - - - - - -
- 0.04
Dichloroethane (1,2-) F zero 0.005
Dichloroethylene (1,1-) I F 0.007 0.007
Dichloroethylefle (cis-1,2-) F 0.07 0.07
Dichioroethylefle (trans-1,2-} F 0.1 0.1
Dichloromethafle P zero 0.005
F
F
F
F
F
0.7 0.7 0.7
2 1 1
4 3 3
20 2 2
10 2 -
2.6
4 0.009 0.4 0.007 -
I 11 0.01 0.4 0.07 -
6 0.02 0.6 0.1 -
- 0.06 2 - 0.5
0.02 -
Dichlorophenol (2,4-) - - -
Dichloropropafle (1 , 1-) I - - -
Dichloropropane (1,2-) F zero 0.005
Dichloropropafle (1,3-) L - -
DichlorooroDafle (2,2-) L - -
D
0
F
0
j 0
0.03 0.03 0.03
- - -
- 0.09 -
- - -
- - -
j 0.1 0.003
- - - -
- - - - 0.05
. - - - -
. - . - -
‘The values for m-dichlorobeflzefle are based on data for o-dichlorobenzene

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Annl 1992 - - Page 4
Ad... .. .... .
I I O•tII V
LJVIC JhIflC
Chemicals
Status MCLG MCI
Reg. (mg/I) (mg/I)
I 10-kg Child J 70-kg Adult
I I Longer- Longer- mg/I
I Status I One-day Ten-day term term RfD DWEL Ufetime at 10
HA I mg/I mg/i mg/I mg/I mg/kg/day mg/i mg/I Cancer
Cancer
I Group

.
Dichloropropene (1,1-)
Dichloropropene (1,3-)
Dieldrin
Diethyl phthalate (PAE)
Diethylene glycol
Risk
L - - D - - - - - - - - -
L - I F 0.03 0.03 0.03 0.1 0.0003 0.01 0.02 B2
- - - I F 0.0005 0.0005 0.0005 0.002 0.00005 0.002 - 0.0002 B2
- - - D - - - - 0.8 30 5 - D
J I
- - - D - - - - - - - -
P zero 0.004 D - - - - 0.02 0.7 - 0.3 B2
- - F 8 8 . 8 30 0.08 3 0.6 - D
- - - F 10 10 10 40 0.3 10 2 - D
- - - D - - - - 0.2 - - - c
- - - I - I - - - I - - - - - D
- - - F 0.04 0.04 0.04 0.14 0.0001 0.005 0.001 - D
1 - - F I 0.50 0.50 0.30 I 1.0 0.002 0.1 - 5.0 B2
L - - F 0.40 0.40 0.40 1.0 0.001 0.04 - £0 B2
P 0.007 0.007 F I 0.3 0.3 0.01 I 0.04 0.001 0.04 0.007 - D
- - - F 4 0.4 - j. - - - 0.7 B2
- - - F 0.3 0.3 0.3 1 0.03 1 0.2 - D
P 0.02 0.02 I - - - - - 0.0022 0.08 0.02 - D
- - - F 0.01 0.01 0.003 0.009 0.00004 0.001 0.0003 - E
- - - 0 - - - - - - - - o
- - - F 1 1 0.3 0.9 0.002 0.07 0.01 0
P 0.1 0.1 F 0.8 0.8 0.2 0.2 0.02 0.7 0.1 - D
P 0.002 0.002 F 0.02 0.02 0.003 0.01 0.0003 0.01 0.002 - D
F zero TT F 0.1 0.1 0.07 0.07 0.002 0.07 - 0.4 B2
F 0.7 0.7 F 30 3 1 I 3 0.1 3 0.7 - D
F zero 0.00005J F 0.008 0.008 - - - - - 0.00004
- - - F 20 6 6 20 2 40 7 . J 0
L - - F 0.3 0.3 0.1 0.4 0.00008 0.003 - 0.006I B2
- - - F 0.009 0.009 0.005 0.02 0.00025 0.009 0.002 - J D
- - - F 2 2 2 5 0.013 0.4 0.09 - I D
- - - - - - 0.04 - - - I D
dinitrate
Diethylhexyl phthalate (PAE)
Diisopropyl methylphosphonate
Dimethrin
Dimethyl methylphosphonate
Dimethyl phthlate (PAE}
1,3-Dinitrobenzene
Dinitrotoluene (2,4-)
Dinitrotoluene (2,6)
Dinoseb
Dioxane g-
Diphenamid
Diquat
Disulfoton
1 ,4-Dithiane
Diuron
Endothail
Endrin
Epichiorohydrin
Ethylbenzene
Ethylene dibromide (EDB)
Ethylene glycol
ETU
Fenamiphos I
Fluometuron
Fluorene (PAH)
Under review. Not verified yet.

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Paoe 5
Anril 1992
Li .d.I. A
La,uuo,uo
JW II.I
—
I
Chemicals
Status MCLG MCL
Reg.* (mg/I) (mg/I)
10-kg ChIld
I Longer- I
Status One-day Tan-day term
HA I mg/I mg/I mg/I
j
70-kg Adult
Cancer
Group
Longer- mg/I
term RfD DWEL Lifetime at iO
mg/I mg/kglday mg/I mg/I Cancer
Risk
Fluorotrich loromethafle
FogOil
Fonotos
Formaldehyde
Gasoline, unleaded (benzene)
L - -
- - -
- - -
- -
- - -
F
0
F
D
D .
7 7 3 10 0.3 10 2
- - - - - - -
0.02 0.02 0.02 0.07 0.002 0.07 0.01 -
10 5 5 I 20 0.15 5 1 - I
- - - - - - 0.005 -
D
-
0
Bi
•
D
B2
B2
B2
&
D
I C
D
D
..
-
-
B2
C
D
•
C
D
D
E
D
D
D
D
j . . .• . .•Q
Glyphosate
Heptachlor
Heptachior epoxide
Hexachlorobenzene
Hexachlorobutadier e
P 0.7 0.7 F
F zero 0.0004 F
F zero 0.0002 I F
P zero 0.001 F
I - - J F
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
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 -
0.2 - -
HexachlorocyClOPefltadierle
Hexachloroethafle
Hexane In-)
Hexazinone
HMX
P 0.05 0.05
L -
- -
- - -
- -
- - - -
F 5 5 0.1
F 10 4 4
F 3 3 3
F 5 5 5
-
0.5 0.001 0.04 0.001 -
10 - - -
9 0.033 1 0.2 -
20 0.05 2 0.4 -
Hypochlorite
Hypochiorous acid
Indeno(1,2,3,-c,d)pyrefle (PAH)
Isophorone
Isopropyl methylphos honate
Isopropylbenzene
Lindane
Malathion
Maleic hydrazide
MCPA
L - I - I - - - I - - - - -
- - - - - . - I - - - - -
P zero 0.0004 D - - - I - - - - -
L • - D 15 15 15 j 15 0.2 7 0.1 -
- - - D 30 30 30 1100 0.1 4.0 0.7 -
- - -
F 2E-4 0.0002
- - -
- - -
i. - - -
D
F
D
F
F
- - - I - - - - -
1 1 0.03 0.1 0.0003 0.01 0.0002 -
0.2 0.2 0.2 0.8 0.02 0.8 0.2 -
10 10 5 20 0.5 20 4 -
j 0.1 0.1 0.1 0.4 0.0015 0.05 0.01 -
Methomyl
Methoxychior
Methyl ethyl ketone
Methyl parathion
Methyl tert butyl ether
L - -
F 0.04 0.04
L - -
- - -
L - -
F
F
F
F
D
0.3 0.3 0.3
0.05 0.05 0.05
80 8 3
0.3 0.3 0.03
1 3 3 0.5
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 -

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Anril 1992
Paae 6
1Jn Ith A,4%,icnr Q.
chemicals
I
I_
I
I
Status
MCLG
MCL
Status
Reg.’
(mg/I)
(mg/I)
HA’ I
lO-ka Child
One-day Ten-day
mg / I
Longer-
term
mg/I
mg/I
70-ko Adult
Longer-
term RID DWEL Ut etime
mg/I mg/kg/day mg/I mg/I
mg/I
at 1O
Cancer
Risk
Cancer
Group
Metotachlor L - - F
Metribuzin I I - - F
Monochioroacetic acid I - - D
Monochlorobenzene I F 0.1 0.1 F
Na hthalene 1. - - - F
2 2 2
5 5 0.3
- -
2 2 2
0.5 0.5 0.4
5 0.15 5 0.1 - I C
0.9 0.025 0.9 0.2 - I D
- - - - I -
7 ‘ 0.02 0.7 0.1 - I
1 0.004 0.1 0.02 -
Nitrocellulose (non-toxic)
Nitroguanidine
Nitrophenols p-
Oxamyl (Vydate)
Ozone by-Droducts
- - -
- - -
- - -
P 0.2 0.2
L - -
F
F I
D I
F
- j
- - - - - - - - I -
10 10 10 I 40 0.1 4 0.7 - D
0.8 0.8 0.8 I 3 0.008 0.3 0.06 - D
0.2 0.2 0.2 0.9 0.025 0.9 0.2 -
- - - . - - - -
Paraquat - - - F I 0.1 0.1 0.05 0.2 0.0045 0.2 0.03 - I E
Pentachloroethane - - - D - - - I - - - - - -
Pentachiorophenol F zero 0.001 I F I 1 0.3 0.3 I 1 0.03 1 - 0.03 B2
Phenanthrene (PAH) - - - - - - - - - - - - -
Phenol - - - D 6 6 6 J 20 0.6 20 4 - D
Picloram P 0.5 0.5 F 20 20 0.7 I 2 0.07 2 0.5 - D
Polychiorinated byphenyls (PCBs) F zero 0.0005 P - - - I - - - 0.0005 B2
Prometon L - - F I 0.2 0.2 0.2 I 0.5 0.015 0.5 0.1 - I D
Pronamide - - - F 0.8 0.8 0.8 I 3 0.075 3 0.05 - I C
Propachior I - - - F 1 0.5 0.5 0.1 1 0.5 0.013 0.5 0.09 -
Propazine I - - - F 1 1 0.5 I 2 0.02 0.7 0.01 - I C
Propham - - - F 5 5 5 20 0.02 0.6 0.1 - D
Propylbenzene n- - - D - - - - - - - - I -
Pyrene (PAH) - - - I - I - - - - 0.03 - - D
RDX - - - F 0.1 0.1 0.1 j 0.4 0.003 0.1 0.002 0.03
Simazine I P 0.004 0.004 F 0.07 0.07 0.07
Styrene I F 0.1 0.1 F I 20 2 2
2,4,5-T L - - F 0.8 0.8 0.8
2,3,7,8-TCDD (Dioxin) P zero 5E-08 I F 1E-06 1E-07 1E-08
Tebuthiuron J - - - I F I 3 3 0.7
0.07 0.005 0.2 0.004 I C
7 0.2 7 0.1 - I C
1 0.01 0.35 0.07 - I D
4E-08 1E-06 4E-08 - 2E-08 B2
2 0.07 2 0.5 -
Under review. NOTE: Phenanthrene -- not proposed.

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Anril 1992
P1OA 7
U ...I.I.. A,.. . ....;. ,.
MCLG MCI
(mg/I) (mg/I)
70-kg Adult
Longer- mg/i
term RfD DWEL Lifetime
mg/I mg/kg/day mg/I mg/I
Chemicals
Status
Reg.*
I 10-kg Child
Status One-day Ten-day
Longer-
term
HA* mg/i mg/i mg/I
Cancer
Group
at i0
Cancer
Rkk
I__
...-. -
Terbacil
-
-
- F
0.3
0.3
0.3
0.9
0.013 0.4
0.09 -
E
Terbufos
-
-
-
F
0.005
0.005
0.001
0.005
0.00013 0.005
0.0009 -
D
Tetrachloroethane (1,1,1,2-)
L
-
-
F
2
2
0.9
3
0.03 1
0.07 0.1
C
Tetrachloroethane (1,1,2,2-)
L
-
-
D
-
.
-
-
- -
- -
.
Tetrachioroethylene
F
zero
0.005
F
2
2
1
5
0.01 0.5
- 0.07
-
Tetranitromethane
-
-
- D
-
-
-
-
- -
-
.
Toluene
F
1
1 F
20
2
2
7
0.2 7
1 -
D
Toxaphene
F
zero
0.003
F
0.5
0.04
-
-
0.1 0.0035
- 0.003
B2
2,4,5-TP
F
0.05
0.05
F
0.2
0.2
0.07
0.3
0.0075 0.3
0.05 -
D
1 ,1,2-Trichloro-1 ,2,2-
trifluoroethane
-
-
-
•
- -
- -
Trichloroacetic acid
L
-
-
D
-
-
-
-
- -
- -
-
Trichloroactonitrile
L
-
- D
0.05
0.05
- -
- -
-
-
TrichlOrobenzene (1,2,4-)
P
0.07
0.07 F
0.1
0.1
0.1
0.5
0.01 0.4
0.07 -
D
Trichlorobenzene (1,3,5-)
-
-
- F
0.6
0.6
0.6 2
0.006 0.2
0.04 -
D
Trichloroethane (1.1.1-)
Trichloroethane (1,1,2-)
F
0.2
0.2
F
100
40
40
100
0.035 1
0.2 -
D
C
P
0.003
0.005 F
0.6
0.4
0.4
1
0.004 0.1
0.003 -
Trichloroethanol (2,2,2-)
L
-
-
-
-
-
-
-
- -
- -
-
Trichlorqethylene
F
zero
0.005
F
-
-
- -
- 0.3
0.3
B2
Trichlorophenol (2,4,6-)
L
-
-
0
-
-
-
-
- -
- 0.3
B2
Trichloroproøane (1.1,1-)
-
-
-
D
-
-
-
-
- -
- -
-
-
Trichloropropane (1,2,3-)
1
-
- F
0.6
0.6
0.6
2
0.006 0.2
0.04 -
Trifluralin .
Trimethylbenzene (1,2,4-)
L
-
- F
0.08
0.08
0.08
0.3
0.0075 0.3
0.005 -
C
-
-
- D
-
-
-
-
- -
- -
.
Trimethylbenzene (1,3,5-)
-
-
- I D
-
-
-
-
- -
- -
-
Trinitroolycerol
- F
0.005
0.005
0.005
0.005
- -
0.005 -
—
Trinitrotoluene
-
-
- F
0.02
0.02
0.02
0.02
0.0005 0.02
0.002 0.1
C
Vinyl chloride
F
zero
0.002 F
3
3
0.01
0.05
- -
- 0.0015 f A
White phosphorus
-
-
- F
-
-
-
-
0.00002 0.0005
0.0001 - I 0
Xylenes
F
10 10 1 F
40
40
40 1100
2 60
10 - L..Q
Under review.

-------
AnrIl 1992
Prn i R
• Under review.
Copper action level 1.3 mg/I
teed - action level 0.015 mg/I
U Iik A,k.... .
chemicals
Status MCLG MCL
Reg. (mg/I) (mg/I)
I 0-ka Child
Status
HM I
One-day Ten-day
mg/I mg/I
longer-
term
mg/I
70.kn Adult
Longer-
term
RID DWEL. Lifetime
mg/I mg/kg/day mg/I
mg/I
at i0-
Cancer
Group
mg/I Cancer
Rlek
INORGANICS
Aluminum
Ammonia
Antimony
Arsenic
L - -
- - -
P 0.003 0.01/0.005
- 0.05
D
D
C)
0
.
- - -
- - -
0.015 0.015 0.015
• * -
.
- - - - -
- - - 30 -
0.015 0.0004 0.015 0.003 -
- - - - 0.002
-
D
C)
A
Asbestos (fibers/I > lOum lenath) F 7 MFL 7 MFL - - - -
Barium F 2 2 F • - -
Beryllium P zero 0.001 D 30 30 4
Boron L - - D 4 0.9 0.9
Cadmium F 0.005 0.005 F 0.04 0.04 0.005
Chioramine L - - D j 1 1 1
- - - - 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
B2
C)
D
Chlorate
Chlorine
Chlorine dioxide
Chlorite
Chromium ttotal)
I - -
I - - I
L - -
I -
F 0.1 0.1
0 - - - I - - - - -
D - - - I - - - -
C) - - - - - - - .
0 - - - I - - - -
F J - 1 1 01 0.8 0.005 0.2 0.1 -
-
-
-

Copper P 1.JT
Cyanide P 0.2 0.2
Fluor lde F 4 4
lead (at tap) I F zero TT
j anaanese - - -
- J - - I - - • -
F 0.2 0.2 0.2 0.8 0.022 0.8 0.2 -
- I - - I • 0.12 - - -
- I - - - I - - - -
D - - - - 0.14 - -
o
D
-
B2
I__.
Mercury org.n1cI
Molybdenum
p 1 sckei
Nitrate(asN)
P lit riteIasN (
F 0.002 0.002 F - - -
I . - D - - -
i 0.1 0.1 F 1 1 0.5
F 10 10 F - 10 -
F 1 1 (_F - 1 -
0.002 0.0003 0.01 0.002 -
- 0.005 0.175 0.035 -
1.7 0.02 0.6 0.1 -
- 1.6 - -
- O.16 - -
D
D
D
.

-------
Anril 1992
U I+I’s A
Paq9 9
Chemicals
tuuwcflJ
Status MCLG MCI
Reg.’ (mg/i) (mg/i)
bolt!, rI
I 10-kg Child
Longer-
Statusf One-day Ten-day term
HA* mg/i mg/I mg/i
4.baUl,00
70-kg Adult
Cancer
Group
Longer- mg/i
term RfD DWEL Lifetime at 1O
mg/i mg/kg/day mg/I mg/i Cancer
Risk
Nitrate + Nitrite (both as N)
Selenium
Silver
Sodium I
Strontium
F 10 10
F 0.05 0.05
- - -
- - -
L I - -
F
-
D
D
D
- - -
- - - I
0.2 0.2 0.2 I
- - -
j_ 25 25 25
- - - - - *
- 0.005 - - - I -
0.2 0.005 0.2 0.1 - 0
- - 20*** - - -
90 2.5 90 17 -
Sulfate P 400/500 400/500 I - - - - - - - - -
Thallium P 0.0005 0.002/ 0 0.007 0.007 0.007 0.02 0.00007 0.002 0.0004 -
0.00 1
Vanadium L - - 0 0.08 0.08 0.03 0.11 0.003 0.11 0.02 -
Zinc L - - 0 I - - - I - 0.3 10.5 2i -
Zinc ch’oride (measured as Zinc) L - - I 0 - - - - 0.3 10.5 2.1 -
-
-
0
D
RADIONUCLIDES
Beta particle and photon
activity (formerly
man-made radionuclides) I F zero 4 mrem - I - - - - - - - 4 mrem/y A
Gross alpha particle activity F zero 15 pCi/I I - I - - - I - - - - - A
Racj um 226/228 P zero 20 pCi/L I - I - - - I - - - - 22/26 pCi/I ( A
Radon P zero 300 pCi/L I - I - - I - - - - 150 pCi/I A
Uranium I P zero 20 pg/i I - - - - - - - - 170 gCi/1 I A
* Under review.
Guidance.

-------
SECONDARY MAXIMUM CONTAMINANT LEVELS
Status Codes: P proposed, F - final
F
F
F
F
F
F
3 threshold odor numbers
6.5 - 8.5
0.10
250
500
5
ApnI 1992
I Status
Paae 10
SMCLs
I (mn/I)
. .o.. .u uo - - — -
Aluminum F
Chloride F
Color F
Copper F
Corrosivitv F
0.05 to 0.2
250
15 color units
1
non-corrosive
Fluoride’
Foaming Agents
Hexachlorocyclopentadiene
Iron
Manganese
F
F
P
F
F
2
0.5
0.008
0.3
0.05
Odor
pH
Silver
Sulfate
Total Dissolved Solids (lOS)
Zinc ______
Under review.

-------
MICROBIOLOGY
Status MCLG MCL
Cryptosporidium L -
Giardia Iambi/a F zero IT
Legionella Fa zero TT
Standard Plate Count F’ NA TI
Total Coliforms (after 12/31/90) F zero **
Turbidity (after 1 2/31/90) F NA PS
Viruses Fa zero IT
Key: PS, IT, F, defined as previously stated.
: Final for systems using surface water; also being considered for regulation under groundwater disinfection
rule.

-------