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
November 1992
-------
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 Req and Status HA columns are as follows:
E - final
draft
listed for regulation
P - proposed (Phase U 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 4.0 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.
-------
c 9q))ç% 3 J
Drinking Water Standards and Health Advisories
November 1992 Page 1
ChemIcals
Standards
Status
HA’
Health
Advisories
Cancer
Group
Status
Rag.’
MCLG
(mg/I)
MCL
(mg/I)
10-kg ChIld
10-kg Adult
One-day Ten-day
Longer-
term
Longer-
term
R(D
(mg/kg!
DWEL Lifetime
mg/I at iO
Cancer Risk
(mg/I) (mg/I)
(mg/I)
(mg!l)
day)
(mg/I) (mg/I)
ORGANICS
Acenaphthene
- - -
-
- -
.
-
0 06
- -
-
-
82
Acufluorlen
- - -
F
2 2
0_i
0.4
0.013
0 4 -
0 1
Acrylamude
F zero TT
F
1.5 0.3
0.02
007
00002
0007 -
0001
81
Acrylonutrule
I - -
0
- -
-
-
-
-
0.006
C
Adipates (duethyihexyl)
P 0 5 0 5
-
- -
-
-
0 7
20 0 5
-
0 04
B2
Alachior
F zero 0 002
F
0.1 0_i
•
-
0 01
0.4 -
Alducarb
F 0 001 0 003
F
- -
-
-
0 0002
0.007 0
-
Alducarb sulfone
F 0 001 0 002
F
- -
-
-
0 0002
0.007 0 001
-
Aldicarb sulfoxude
F 0 001 0 004
F
- -
-
-
0 0002
0 007 0 001
-
Aidrun
- - -
D
0.0003 0.0003
0.0003
0.0003
000003
0.001 -
00002
0
Ametryn
- - -
F
9 9
0 9
3
0 009
0 3 0 06
-
0
Ammonium sulfamate
- -
F
20 20
20
30
0.28
8
-
D
Anthracene (PAN)
- -
-
- -
-
-
0 3
-
-
C
Atrazune
F 0.003 0.003
F
0.1 0.1
0.05
0.2
0.005
0.2 0 003
-
C
Baygon
- - -
F
0.04 0 04
0 04
0 1
0 004
0 1 0
0 02
-
-
0
Bentazon
I -
F
0.3 0.3
0.3
0.9
0 0025
0.09
B2
Benz(a)anthracefle (PAH)
P zero 0.0001
-
- -
-
-
-
- -
0 1
A
Benzene
F zero 0 005
F
0.2 0 2
-
-
-
- -
B2
Benzo(a)pyrene (PAH)
P zero 0 0002
-
- -
-
-
-
- -
-
82
Benzo(b)tluorafllhefle (PAH)
P zero 0 0002
-
- -
-
-
-
-
-
-
0
Benzo(g.h.u)perylefle (PAH)
- - -
-
- -
-
-
-
-
-
82
Benzo(k)fluoraflthefle (PAH)
P zero 0.0002
-
- -
-
-
-
- -
0 3
-
0
b s -2 -ChlorOiSoprOpyi ether
- - -
F
4 4
4
13
0 04
0 09
-
c
Bromacul
L - -
F
5 5
3
9
0 13
5
Bromobenzefle
L -
D
- -
-
.
.
. .
• Under review
NOTE Antlira;ene and Benzo(g,h,u)perylefie — not proposed in Phase V
NOTE Changes from the last veaslon ore noted in Italic and Bold Face pnnt.
-------
Drinking Water Standards and Health Advisories
November 1992 Page 2
Chemicals
[ Standards
Status
HA
Health Advisories
Cancer
Group
10kg ChIld
70-kg Adult
Status
Rag.’
MCLG
(mg/il
MCL
(mg/I)
One-day
(mg/il
I
I I Longer-
I Ten-day I term
(mg/i) (mg/il
Longer- I
term I
(mg/U
RfD I I I
(mg/kg! I DWEL I LifetIme I mg/i at i0
day) (mg/i) (mg/i) Cancer Risk
Bromoch loroacetonitrile
Bromochioromethane
Bromodichioromethane (THM)
Bromoform (THM)
Bromomethane
Butyl benzyl phthalata (PAE)
Butylate
Butylbenzene n-
Butylbenzene sec-
Butylbenzene tert-
Carbaryl
Carbofuran
Carbon tetrachtoride
Carboxin
Chioral hydrate
Chloramben
Chiordane
Chiorodibromomethane (THM)
Chioroethane
Chloroform (THM)
Chioromethane
Chlorophenol (2-)
p-Chlorophenyi methyl
sull idelsulfone/sulloxlde
Chioropicrin
Chiorothalonil
Chlomotoluene o-
Chiorotoluene p-
Chiorpyrufos
Chrysene (PAN)
Cyanatine
I
I
I
L
P
F
F
L
F
I
L
L
I
L
L
L
P
1
- 01
- 0.1
zero 0.1
0.04 004
zero 0005
zero 0002
- 0.1
- 0.1
zero 0 0002
D
F
0
D
F
F
0
D
D
F
F
F
F
0
F
F
0
0
0
F
0
F
F
F
U
F
50
1
1
5
0.013
05
009 -
-
7
7
4
13
002
07
-
0.06
5
2
2
6
002
0.7
-
0.4
0.1
0_i
0.1
05
0001
0.05
001
-
-
-
-
-
02
6
-
-
2
2
1
4
005
2
035
-
1
1
1
1
01
4
07
0.05
0.05
0.05
0.2
0005
0.2
004
-
4
02
007
03
00007
003
-
003
1
1
1
4
01
4
07
-
7
1.4
0.2
0.6
0.0002
0.07
0.06
3
3
0.2
05
0.015
05
01
-
006
006
-
-
000006
0002
-
0003
7
7
2
8
0.02
07
0.06
-
4
4
0.1
04
0.01
04
-
0.6
9
04
04
1
0004
01
0003
•
0.05
0.05
0.05
0 2
0.005
0 2
0.04
02
02
02
05
0015
05
015
2
2
2
7
002
01
01
2
2
2
7
002
07
01
0 03
0 03
0.03
0 1
0 003
0 1
0 02
01
01
002
0,07
0002
007
0001
62
62
D
C
D
0
E
82
D
C
0
82
C
B2
C
0
D
R2
0
U
0
82
C
A HA will spot be developed due to insufficient data; a Database Deficiency Report has been pubhshud
NOTE Chrysene was proposed in second option
-------
Drinking Water Standards and Health Advisories
November 1992 Page 3
Chemicals
Standards
Status
HA
Health
Advisouos
Cancer
Grou
Status
Reg.
MCLG
(mg/I)
MCL
1mg/I)
10-kg ChIld
70-kg Adult
One-day
Ten-day
Longer
term
Longer-
term
RID
(mg/kgt
DWEL Lifetime
mg/I at 1O
(mg/I)
(mg/I)
(mg/I)
(mg/I)
day)
(mgII) (mg/I)
Cancer Risk
Cyanogen chloride
L - -
-
-
-
-
-
-
-
-
.
Cymene p-
- - -
0
-
-
-
.
-
- -
.
.
2,4-D
F 0 07 0.07
F
1
0 3
0 1
0 4
0 01
0 4 0 07
-
D
DCPA (Dacthal)
I - -
F
80
80
5
20
0 5
20 4
.
D
Dalapon
P 0 2 0 2
F
3
3
0 3
0 9
0 026
0 9 0 2
-
D
Di12-ethyihexy lladipate
P 0 4 0 4
-
20
20
20
30
0.6
20 0 4
3
C
Diazinon
- - -
F
0 02
0 02
0 005
0 02
0 00009
0 003 0 0006
-
E
Dibenz(a,h)anthracefle (PAH)
P zero 0 0003
-
-
-
•
-
-
- -
-
B2
Dibromoacetonitrile
L - -
D
2
2
2
8
0 02
0 8 0 02
-
C
Dibromochloropropane (DBCP)
F zero 0 0002
F
0.2
0.05
-
-
-
- -
0 003
B2
Dibromomethane
L - -
-
-
-
-
-
-
- -
-
D
Dibutyl phthalate (PM)
- - -
-
-
-
-
-
0.1
4 -
-
D
Dicamba
L - -
F
0 3
0.3
0.3
1
0 03
1 0 2
-
D
D ichloroacetaldehyde
L - -
0
-
-
.
-
-
- -
Dichioroacetic acsd
I - -
D
-
50
5
!0
0 008
0.3 -
-
82
D,chloroacetonitriie
L - -
0
1
1
0.8
3
0 008
0 3 0 006
-
C
Dichiorobenzene o-
F 0.6 0 6
F
9
9
9
10
0.09
3 0 6
-
D
D,chlorobenzene rn- •
F 0.6 0.6
F
9
9
9
10
0.09
3 0 6
-
D
Dichlorobenzene p-
F 0.075 0 075
F
10
10
10
0
0 1
4 0 075
-
C
Dich lorodifluoromethafle
I - -
F
40
40
9
10
0.2
5 1
-
D
Dichloroethane (1,1-)
L - -
D
-
-
-
-
-
- -
-
D,chloroeihane (1,2-)
F zero 0.005
F
0.7
0.7
0.7
2 6
-
- -
0.04
B2
Dichloroethyiene (1.1-)
F 0007 0007
F
2
1
1
4
0009
04 0007
-
C
Dichioroethylene (cis-1 .2-)
F 0 07 0.07
F
4
3
3
11
0.01
0 4 0 07
-
0
Dichloroethyiene (trans-1,2-)
F 0.1 0 1
F
20
2
2
6
002
06 0 1
-
0
Dichioromethane
P zerO 0.005
F
10
2
-
-
0 06
2 -
0 5
82
Dichiorophenoi (2.4-)
- - -
D
0.03
0 03
0 03
0 1
0 003
0 1 0 02
-
0
Dchloropropane (1,1-)
- - -
0
-
-
-
-
-
- -
-
Dichioropropane (1.2-I
F zero 0005
F
-
009
-
-
-
- -
005
B2
Dich ornpropane (1 ,3-)
L - -
0
-
-
-
-
-
- -
-
-
• Tt e values for in-dichIoroben ene are based on data for o-dichlorobenzene
-------
Drinking Water Standards and Health Advisories
November 1992
Chemicals
Stand ard5
MCLG
Imofl)
MCL
(mgll)
Status
HA
Health Advisories
One-day Tan-day
(mg/H (mgIl)
10-kg Child
- 70-kg Adult
Page 4
Longer-
term
(mg/Il
Longer-
AfO
term
(mg/kg!
DWEL
LifetIme
mgll at iø
(mg/I)
day)
(mg/I)
(ingli l
Cancer RIsk
0.03
003
003
0.0005
0.0005
0.0005
Cancer
Group
Statue
I
I
L
P zero 0004
L - -
L - -
P 0.007 0.007
P 002
Dichloropropane (2,2 1
Dichloropropene (1 • 1-)
D3chloropropene 11,3-)
Dieldrin
Diethyl phthalate (PAE)
Diethylene glycol dinitrate
Diethylhexyl phthalate (PAE)
Ditsopropyl methylphosphonate
Dumethrun
Dimethyl methyiphosphonate
Dimethyl phihalate IPAE)
1 ,3-Dinitrobenzene
Dinitrotoluene (2.4-)
Dinirrotoluene (2.6-)
Dinoseb
Dioxarte p-
Diphenamud
DiphenylDinlne
Diquat
Disulfoton
Duthuane (1,4-)
Diuron
Enciothail
Endrun
Epichtorohydrin
Ethylbenzene
Ethylene dibromude (EDB)
Ethylene glycol
ETU
Fenarniphos
Fluorneturon
D
0
F
F
D
0*
D
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
8
8
8
10
10
10
2
2
2
0.04
0.04
0 04
0.50
0.50
030
0.40
0.40
0.40
03
03
001
4
0.4
-
03
03
0.3
1
1
0.3
0.01
0.01
0.003
0.4
0.4
0.4
1
1
0.3
0.8
08
02
0.02
0.02
0.003
0.1
01
007
30
3
1
0008
0008
-
20
6
6
03
03
01
0.009
0 009
0 005
2
2
2
01
00003
001
-
002
0002
0.00005
0002
-
00002
-
08
30
5
-
-
002
07
-
03
30
008
3
06
-
O
03
10
2
-
6
0.2
7
0.1
0.7
0.14
0.0001
0006
0001
-
1
0002
01
-
0005
1
0001
004
-
0.005
004
0001
004
0007
-
-
-
-
-
0.7
1
003
1
02
-
1
0.03
1
0.2
-
00022
008
002
0.009
000004
0001
00003
-
1
0.01
0.4
0.08
-
09
0.002
007
0.0’)
02
002
07
01
-
001
0.0003
001
0002
-
0,07
0002
007
-
04
3
01
3
07
-
-
-
-
-
000004
20
2
40
7
-
04
000008
0003
-
003
002
000025
0009
0002
-
5
0013
04
009
-
002
01
0.002
TI
0.7
o 00005
01
o 002
zero
07
zero
P
P
F
F
F
L
B2
62
D
132
0
D
C
0
0
B2
62
D
B2
D
D
0
E
D
0
D
0
B2
D
B2
D
62
0
0
Under review “A HA will not be developed due to Insufficient data; a Database Deficiency Roporr has boon pob/ishod
-------
Drinking Water Standards and Health Advisories
November 1992 Page 5
I Standard5
Status
HA
Health
Advisories
Cancer
Group
Status
Reg.
MCLG
(mgII)
MCL
(mg/I)
1 0-kg Child
.
70-kg Adult
One-day
Ten-day
Longer-
term
Longer-
term
RfD
(mg/kg!
OWEI. Lifetime
mg/i at 10”
(mg/i)
(mg/I)
(mg/i)
(mg/I)
day)
(mg/il (mg/I)
Cancer Risk
- -
-
-
-
-
-
0 04
- -
-
D
L -
F
7
7
3
10
0 3
10 2
-
D
- - -
D
-
-
-
-
-
- -
.
- - -
F
0.02
0.02
0.02
0.07
0 002
0 07 0.01
5 1
-
D
- - -
D
10
5
5
‘O
0 15
-
81
(benzene)
- - -
D
-
-
-
-
-
- 0 005
-
-
P 0 7 0.7
F zero 0 0004
F zero 0.0002
P zero 0.00 1
L - -
P 0.05 0.05
L - -
- - -
- - -
- - -
F
F
F
F
F
-
F
F
F
F
20
0.01
0.01
0.05
0.3
-
5
10
3
5
20
0.01
-
0.05
0.3
.
5
4
3
5
1
0.005
0 0001
0.05
0 1
-
0.1
4
3
5
1
0.005
0 0001
0.2
0 4
-
0.5
10
9
20
0 1
0 0005
1 3E-0 5
0 0008
0 002
0 007
0 001
-
0 033
0 05
4 0 7
0,02 -
0 0004 -
0 03 -
0 07 0.001
0 2 -
0 04 0 001
- -
1 0 2
2 0.4
-
0 0008
0 0004
0 002
-
-
-
-
-
-
0
B2
82
82
C
D
C
D
D
0
I - -
-
-
-
-
-
-
- -
-
-
- - -
.
-
.
.
.
.
-
(PAH)
P zero 0.0004
D
.
-
-
- -
-
82
methylphosphonate
I - -
- - -
F
0
15
30
15
30
15
30
1 5
100
0.2
0 1
7 0.1
4 0 0 7
4
-
C
D
- - -
F 0 0002 00002
- - -
- - -
- - -
L - -
F 0 04 0 04
D
F
0
F
F
F
F
-
1
0.2
10
0.1
0.3
0.05
-
1
0.2
10
0.1
0 3
0 06
-
0.03
0.2
5
0.1
0 3
0 05
.
0.1
0 8
20
0.4
0 3
0 2
-
00003
0.02
0 5
0.0015
0 025
0 005
- -
001 0 0002
0 8 0.2
20 4
005 001
0 9 0 2
0 2 0 04
-
-
-
-
-
-
-
-
C
D
D
E
D
D
- -
ketone
- - -
-
-
- - -
F
0.3
0.3
003
0.1
000025
0009 0002
-
0
• Under review
-------
Drinking Water Standards and Health Advisories
November 1992 Page 6
F Standards
Status
HA•
Health
Advisories
Cancer
Gro
UP
Status
Reg.
MCLG
(mg/I)
MCI
(mg/i)
10-kg Child
10-kg Adult
‘
One-day
Ten-day
Longer
term
Longer-
term
RfD
(mg/kg!
DWEI Lifetime
mg/I at 10
Cancer
(mg/I)
(mg/I)
(mg/I)
(mg/I)
day)
(mg/I) (mg/I)
ether
I - -
L - -
I - -
D
F
F
3
2
5
3
2
5
0 5
2
0 3
2
5
0 9
0 005
0 lb
0 025
0 2 0 04
5 0 1
0 9 0 2
.
•
-
D
C
D
acid
(non-toxic)
I - -
F 0.1 0.1
- - -
- - -
- -
- - -
P 0.2 0.2
L -
- - -
- - -
F zero 0.001
D
F
F
F
F
D
F
-
F
D
F
-
2
0.5
10
0.8
0.2
-
0.1
-
1
-
2
0.5
10
0 8
0.2
-
0.1
-
0.3
-
2
0.4
10
0 8
0.2
-
0.05
-
0.3
-
7
1
0
3
0 9
-
0.2
-
1
-
0 02
0 004
0 1
0 008
0 025
-
0 0045
-
0 03
- -
0 7 0 1
0 1 0.02
- -
4 0 7
0 3 0 06
0 9 0.2
- -
0 2 0 03
- -
1 -
-
-
-
.
-
-
-
.
0 03
-
-
D
D
-
D
D
E
E
B2
-
(PAH)
- - -
- - -
P 0 5 0 5
-
D
F
-
6
20
-
6
20
-
6
0 1
-
20
2
-
0 6
0 07
20 4
2 0 5
-
-
D
0
biphenyl
(Dioxin)
s (PCBS)
F zero 0.0005
I - -
. - -
- - -
- - -
- - -
- -
. - -
- - -
P 0 004 0 004
F 0 1 0 1
1 - -
P zero 5E-OB
P
F
F
F
F
F
D
F
F
F
F
F
-
02
0.8
U.S
1
5
0 1
0 07
20
08
1E-06
.
02
0.8
0 5
1
5
0 1
0 07
2
08
1E-07
-
02
0.8
0 1
0.5
5
0.1
0 07
2
08
1E-08
-
05
3
0 5
2
.0
0 4
0 07
7
1
4E-08
-
0015
0.075
0 013
0.02
0 02
.
0 03
0 003
0 005
0 2
001
1E-09
-
05 01
3 0.05
0 5 0 09
0 / 0 01
0 6 0 1
- -
-
0 1 0 002
0 2 0 004
7 0 1
035 007
41-08
0.0005
-
-
-
-
.
0 03
-
-
-
2E-08
B2
0
C
D
C
0
0
C
C
C
D
B2
• Under review NOTE. Phendntlirelie — riot proposed
-------
Drinking Wat r Standards and Health Advisories
November 1992 Page 7
_______
I Standards
Chemicale
Statue MCLG MCL
R.g. (mgll) (mgIl)
Status
HA
Health
Adv(sortos
Cancer
Group
10-kg ChIld
70-kg Adult
(mg/i)
One-day
(mg/i)
Ten-day
Longer-
term
(mg/i)
Longer- I Rf 0 I I I
term (mg/kg! I DWEL Lifetime J mg/i at 1O
(mg ) day) J (mg/fl (mg/I) I Cancer Risk
3
3
0.7
0.3
0.3
0.3
0.005
0005
0001
2
2
0.9
2
2
1
20
2
2
05
004
-
0.2
0.2
0 07
2
09
0 005
3
5
7
03
2
04
0 005
1
05
7
0 0035
03
Tebuthiuron
Terbacil
Terbufos
Tetrachloroethane (1,1,1.2-)
Tetrachloroethane (1.1.2.2-)
Tetrachioroethylene
Tetranitromethane
Toluene
Toxaphene
2,4,5 -TP
1,1 ,2-Trich loro-1.2,2-
trifluoroettiane
Trichioroacetic acid
Trichioroactonitrile
Trichlorobenzefla (1.2,4-)
Trich(orobenzene (1.3,5-)
Trichioroethane 1.1 .1 )
Trichloroethane (1,1,2-)
Trichloroethanol (2.2,2-)
Trichioroethylene
Tochlorophenol (2,4,6-)
Tiichloropropane (1,1 • 1-)
Trichloropropane (1.2.3-)
Tof luralin
Trimethy lbenzene (1,2,4-)
Trirnethylbenzene (1.3.5-)
Trinitroglycerol
Trinitrotoluene
Vinyl c 1 ilorude
White phosphorus
Xy lenes
05
0.09
0 0009
0 07
0 05
L
I - -
F zero 0 005
F 1 1
F zero 0 003
F 005 005
L
I - -
P 0.07 0.07
F 0.2 0.2
P 0003 0005
L - -
F zero 0 005
I - -
I
L - -
F zero 0 002
F 10 10
F
F
F
F
0
F
F
F
F
D
D
F
F
F
F
F
D
0
F
F
D
D
F
F
F
F
F
-
2
4
13
0.05
0.05
-
-
0.1
0.1
0.1
05
06
0.6
06
2
100
40
40
100
06
0.4
04
1
0.6
0.6
0.6
2
008
008
008
0.3
0 o7
0013
000013
003
0 01
0.2
01
0 0075
0.04
0.01
0 006
0.035
0 004
0006
0 0075
0 0005
0 00002
2
01
007
0 003
03
03
01
00015
0
E
D
C
D
D
C
D
D
0
C
B2
82
82
C
C
A
D
D
1.3 1
04 007
02 004
1 0.2
01 0003
03 -
02 004
03 0005
0.005 0.005 0.005
0.02 0 02 0.02
3 3 0.01
40 40 40
0.005
0 02
0.05
100
0 (12
0 0005
60
C) 005
0 002
00001
10
A HA will not b8 devolopad duo 10 insufficient data; a Oatabase Deficiency Report - has boon published
-------
Drinking Water Standards and Health Advisories
November 1992 Page 8
Standard.
Statue
HA
Health
Advisories
Cancer
Gr
CUP
Status
Reg.
MCLG
(mg/H
MCL
(mg /i)
10-kg Child
70-hg Adult
.
One-day
Ten-day
LOfl f’
term
longar
term
RID
(mg/kg!
DWEL Lifetime
mg/i at iO
1mg/I)
(mg/I)
4mg/I)
(mg/I)
day)
(mg/I) (mg/I)
Cancer Risk
I - -
D
-
-
-
-
- -
-
-
- -
D
-
-
-
- 30
-
D
p 0.003 0.006
F
0.015
0.015
0015
0015
0.0004
0 015 0003
-
o
‘ - 0 05
0
-
•
-
-
- -
0 002
A
> 10pm
F 7 MFL 7 MFL
-
.
-
-
-
-
- -
700 MFL
A
F 2 2
P zero 0.00 1
F
0
-
30
-
30
-
4
.
20
0 07
0 005
2 2
0 2 -
-
0 0008
D
82
I - -
D
4
0.9
0.9
3
0.09
3 0 6
-
0
F 0 005 0.005
F
0.04
0.04
0.005
0.02
0 0005
0 02 0 005
-
D
L -
D
1
1
1
1
0.1
3.3 2 6
-
-
I - -
D
-
-
-
-
-
- -
I -
0
-
-
-
-
-
. -
L - -
0
-
-
-
-
-
- -
-
I - -
F 0.1 0.1
0
F
-
1
-
1
-
0 2
-
0 8
-
0005
- -
0 2 0 1
-
D
F 1.3 IT”
-
-
-
-
-
-
- -
-
D
P 0.2 0.2
F 4 4
F
0.2
-
0.2
-
0.2
-
0 8
-
0 022
0.12
0 8 0 2
-
-
.
o
.
F zero TT’
-
-
-
-
-
-
- -
-
82
L 0.2 -
0
-
•
0.141
0.005
-
-
.
F 0.002 0 002
L - -
P 0 1 0 1
F
F
F
-
-
1
-
0.08
1
-
0.01
0 5
0.00 2
0.05
1 7
0 0003
0 005
0 02
0 01 0 002
0.2 0.04
0 6 0 1
-
-
-
D
D
D
F 10 10
F 1 1
F
F
•
-
10’
1 ‘
-
-
-
-
1 6
0 16
. .
- -
.
.
U rider review
Cooper — action level 1 3 rnglL
Lead — action level 0015 mg/I
-------
Drinking Water Standards and Health Advisories
November 1992 Page 9
Chemicals
Standards
Status
HA
Health Advisories
Cancer
3roup
Status
Reg.
MCLG
(mg/i)
MCL
(mg/i)
10-kg Child
70-kg Adult
Longer-
One-day Ten-day term
(mg/li (mg/i) (mg/I)
Longer- Hf D
term (mg/kg! DWEL LifetIme mg/i at iO
(mg/I) day) (mg/i) (mg/I) Cancer Risk
Nitrate + Nitrite (both as N)
Selenium
Silver
Sodium
Strontium
Sulfate
Thallium
Vanadium
Zinc
Zinc chloride (measured as Zinc)
RADIONUCLIDES
Beta particle and photon
activity (formerly
man-made radionuclides)
Gross alpha particle activity
Radium 226/228
Radon
Uranium
F 10 10
F 0.05 0.05
- - -
- - -
L - -
P 400/500 400/500
P 0.0005 0.002
L - -
L - -
L - -
F zero 4 mrem
F zero 15 pCI/L
P zero S pCi/I
P zero 300 pCi/L
P zero 20 pg/I
F
-
0
0
0
-
F
0
F
F
-
-
-
-
-
- -
- -
0 2 0.2 0.2
- - -
25 25 25
- - -
0.007 0.007 0.007
0.08 0.08 0.03
6 6 3
6 6 3
- - -
- -
- - -
- - -
- - -
- - - - -
- 0 005 - - -
0 2 0 005 0 2 0 1 -
- - 20’s - -
0 2.5 90 17 -
- - - - -
0 02 0 00007 0 002 0 0004 -
0.11 0 003 0.11 0 02 -
12 0.3 11 2 -
12 0.3 11 2 -
- - - - 4 mrem/y
- - - - -
- - - - 22/26 pCi/L
- - - - 2/0 pCi/I
- - - - 170 pCi/L
-
D
D
-
-
D
D
0
A
A
A
A
A
• Under review.
Guidance.
-------
Secondary Maximum Contaminant Levels
November 1992 Page 10
I Chemicals
Status
SMCLs (mg/I)
Aluminum
F
0.05 to 0.2
Chloride
F
250
Color
F
1 5 color units
Copper
F
1
Corrosivity
F
non-corrosive
Fluoride*
Foaming agents
Hexachiorocyclopentadiene
Iron
F
F
P
F
2
0.5
0.008
0.3
Manganese
F
0.05
Odor
F
3
threshold odor numbers
pH
F
6.5—8.5
Silver
F
0.10
Sulfate
Total dissolved solids (TDS)
F
F
250
500
Zinc
F
5
Status Codes: P — proposed, F — final
* Under review.
-------
Microbiology
November 1992 Page 11
Status
MCLG
MCI
Cryptosporidium
L
-
-
Giardia Iamb/ia
F
zero
TT
Legionella
F’
zero
U
Standard Plate Count
F
NA
TI
Total Coliforms (after 12/31/90)
F
zero
**
Turbidity (after 12/31/90)
F
NA
PS
Viruses
F
zero
U
Key: PS, TI, F, defined as previously stated.
Final for systems using surface water; also being considered for
regulation under groundwater disinfection rule.
------- |