Washington Administrative Code
Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508)
Chapter 173-200 - Water quality standards for groundwaters of the state of Washington
Section 173-200-040 - Criteria
Current through Register Vol. 24-06, March 15, 2024
(1) Groundwaters in the state of Washington support many different beneficial uses. The purpose of these criteria is to establish maximum contaminant concentrations for the protection of a variety of beneficial uses of Washington's groundwater.
(2) The following criteria shall apply to all groundwaters in the state of Washington:
The criteria for primary and secondary contaminants and radionuclide contaminants in Table 1 shall be amended as the federal and state rules are amended and without amendment of this chapter.
Groundwater Criteria = (ug/1) |
RISK x BW x LIFE x UCF |
||
CPF x DWIR x DUR |
|||
Where: |
|||
RISK |
= |
Human cancer risk level (1 in 1,000,000) |
|
BW |
= |
Body Weight (70 kg) |
|
LIFE |
= |
Lifetime (70 years) |
|
UCF |
= |
Unit conversion factor (1,000 ug/mg) |
|
CPF |
= |
Cancer potency factor as published in the IRIS data base (1/mg/kg/day) |
|
DWIR |
= |
Drinking water ingestion rate (2.0 liters/day) |
|
DUR |
= |
Duration of exposure (30 years) |
For volatile carcinogens, inhalation exposure from showering was incorporated into the criteria by doubling the drinking water ingestion rate.
(3) For contaminants for which no numeric criteria have been established, enforcement limits shall be established in accordance with WAC 173-200-050.
TABLE 1
GROUNDWATER QUALITY CRITERIA
CONTAMINANT |
CRITERION |
|||||
I. |
PRIMARY AND SECONDARY CONTAMINANTS AND RADIONUCLIDES |
|||||
A. |
PRIMARY CONTAMINANTS |
|||||
Barium* |
1.0 |
milligrams/ liter (mg/1) |
||||
Cadmium* |
0.01 |
mg/1 |
||||
Chromium* |
0.05 |
mg/1 |
||||
Lead* |
0.05 |
mg/1 |
||||
Mercury* |
0.002 |
mg/1 |
||||
Selenium* |
0.01 |
mg/1 |
||||
Silver* |
0.05 |
mg/1 |
||||
Fluoride |
4 |
mg/1 |
||||
Nitrate (as N) |
10 |
mg/1 |
||||
Endrin |
0.0002 |
mg/1 |
||||
Methoxychlor |
0.1 |
mg/1 |
||||
1,1,1-Trichloroethane |
0.20 |
mg/1 |
||||
2-4 D |
0.10 |
mg/1 |
||||
2,4,5-TP Silvex |
0.01 |
mg/1 |
||||
Total Coliform Bacteria |
1/100 |
ml |
||||
B. |
SECONDARY CONTAMINANTS |
|||||
Copper* |
1.0 |
mg/1 |
||||
Iron* |
0.30 |
mg/1 |
||||
Manganese* |
0.05 |
mg/1 |
||||
Zinc* |
5.0 |
mg/1 |
||||
Chloride |
250 |
mg/1 |
||||
Sulfate |
250 |
mg/1 |
||||
Total Dissolved Solids |
500 |
mg/1 |
||||
Foaming Agents |
0.5 |
mg/1 |
||||
pH |
6.5-8.5 |
|||||
Corrosivity |
noncorrosive |
|||||
Color |
15 color units |
|||||
Odor |
3 threshold odor units |
|||||
C. |
RADIONUCLIDES |
|||||
Gross Alpha Particle Activity |
15 |
pico Curie/ liter (pCi/1) |
||||
Gross Beta Particle Radioactivity Gross Beta Activity Tritium Strontium-90 |
50 20,000 8 |
pCi/l pCi/l pCi/l |
||||
Radium 226 & 228 |
5 |
pCi/1 |
||||
Radium -226 |
3 |
pCi/1 |
||||
II. CARCINOGENS |
||||||
Acrylamide |
0.02 |
micrograms/ liter ug/1 |
||||
Acrylonitrile |
0.07 |
ug/1 |
||||
Aldrin |
0.005 |
ug/1 |
||||
Aniline |
14 |
ug/1 |
||||
Aramite |
3 |
ug/1 |
||||
Arsenic* |
0.05 |
(ug/1) |
||||
Azobenzene |
0.7 |
ug/1 |
||||
Benzene |
1.0 |
ug/1 |
||||
Benzidine |
0.0004 |
ug/1 |
||||
Benzo(a)pyrene |
0.008 |
ug/1 |
||||
Benzotrichloride |
0.007 |
ug/1 |
||||
Benzyl chloride |
0.5 |
ug/1 |
||||
Bis(chloroethyl)ether |
0.07 |
ug/1 |
||||
Bis(chloromethyl)ether |
0.0004 |
ug/1 |
||||
Bis(2-ethylhexyl) phthalate |
6.0 |
ug/1 |
||||
Bromodichloromethane |
0.3 |
ug/1 |
||||
Bromoform |
5 |
ug/1 |
||||
Carbazole |
5 |
ug/1 |
||||
Carbon tetrachloride |
0.3 |
ug/1 |
||||
Chlordane |
0.06 |
ug/1 |
||||
Chlorodibromomethane |
0.5 |
ug/1 |
||||
Chloroform |
7.0 |
ug/1 |
||||
4 Chloro-2-methyl aniline |
0.1 |
ug/1 |
||||
4 Chloro-2-methyl analine hydrochloride |
0.2 |
ug/1 |
||||
o-Chloronitrobenzene |
3 |
ug/1 |
||||
p-Chloronitrobenzene |
5 |
ug/1 |
||||
Chlorthalonil |
30 |
ug/1 |
||||
Diallate |
1 |
ug/1 |
||||
DDT (includes DDE and DDD) |
0.3 |
ug/1 |
||||
1,2 Dibromoethane |
0.001 |
ug/1 |
||||
1,4 Dichlorobenzene |
4 |
ug/1 |
||||
3,3' Dichlorobenzidine |
0.2 |
ug/1 |
||||
1,1 Dichloroethane |
1.0 |
ug/1 |
||||
1,2 Dichloroethane (ethylene chloride) |
0.5 |
ug/1 |
||||
1,2 Dichloropropane |
0.6 |
ug/1 |
||||
1,3 Dichloropropene |
0.2 |
ug/1 |
||||
Dichlorvos |
0.3 |
ug/1 |
||||
Dieldrin |
0.005 |
ug/1 |
||||
3,3' Dimethoxybenzidine |
6 |
ug/1 |
||||
3,3 Dimethylbenzidine |
0.007 |
|||||
1,2 Dimethylhydrazine |
60 |
ug/1 |
||||
2,4 Dinitrotoluene |
0.1 |
ug/1 |
||||
2,6 Dinitrotoluene |
0.1 |
ug/1 |
||||
1,4 Dioxane |
7.0 |
ug/1 |
||||
1,2 Diphenylhydrazine |
0.09 |
ug/1 |
||||
Direct Black 38 |
0.009 |
ug/1 |
||||
Direct Blue 6 |
0.009 |
ug/1 |
||||
Direct Brown 95 |
0.009 |
ug/1 |
||||
Epichlorohydrin |
8 |
ug/1 |
||||
Ethyl acrylate |
2 |
ug/1 |
||||
Ethylene dibromide |
0.001 |
ug/1 |
||||
Ethylene thiourea |
2 |
ug/1 |
||||
Folpet |
20 |
ug/1 |
||||
Furazolidone |
0.02 |
ug/1 |
||||
Furium |
0.002 |
ug/1 |
||||
Furmecyclox |
3 |
ug/1 |
||||
Heptachlor |
0.02 |
ug/1 |
||||
Heptachlor Epoxide |
0.009 |
ug/1 |
||||
Hexachlorobenzene |
0.05 |
ug/1 |
||||
Hexachlorocyclohexane (alpha) |
0.001 |
ug/1 |
||||
Hexachlorocyclohexane (technical) |
0.05 |
ug/1 |
||||
Hexachlorodibenzo-p-dioxin, mix |
0.00001 |
ug/1 |
||||
Hydrazine/Hydrazine sulfate |
0.03 |
ug/1 |
||||
Lindane |
0.06 |
ug/1 |
||||
2 Methoxy-5-nitroaniline |
2 |
ug/1 |
||||
2 Methylaniline |
0.2 |
ug/1 |
||||
2 Methylaniline hydrochloride |
0.5 |
ug/1 |
||||
4,4' Methylene bis(N,N'-dimethyl) aniline |
2 |
ug/1 |
||||
Methylene chloride (dichloromethane) |
5 |
ug/1 |
||||
Mirex |
0.05 |
ug/1 |
||||
Nitrofurazone |
0.06 |
ug/1 |
||||
N-Nitrosodiethanolamine |
0.03 |
ug/1 |
||||
N-Nitrosodiethylamine |
0.0005 |
ug/1 |
||||
N-Nitrosodimethylamine |
0.002 |
ug/1 |
||||
N-Nitrosodiphenylamine |
17 |
ug/1 |
||||
N-Nitroso-di-n-propylamine |
0.01 |
ug/1 |
||||
N-Nitrosopyrrolidine |
0.04 |
ug/1 |
||||
N-Nitroso-di-n-butylamine |
0.02 |
ug/1 |
||||
N-Nitroso-N-methylethylamine |
0.004 |
ug/1 |
||||
PAH |
0.01 |
ug/1 |
||||
PBBs |
0.01 |
ug/1 |
||||
PCBs |
0.01 |
ug/1 |
||||
o-Phenylenediamine |
0.005 |
ug/1 |
||||
Propylene oxide |
0.01 |
ug/1 |
||||
2,3,7,8-Tetrachlorodibenzo- p-dioxin |
0.0000006 |
ug/1 |
||||
Tetrachloroethylene (perchloroethylene) |
0.8 |
ug/1 |
||||
p,ALPHA,ALPHA,ALPHA-Tetrachlorotoluene |
0.004 |
ug/1 |
||||
2,4 Toluenediamine |
0.002 |
ug/1 |
||||
o-Toluidine |
0.2 |
ug/1 |
||||
Toxaphene |
0.08 |
ug/1 |
||||
Trichloroethylene |
3 |
ug/1 |
||||
2,4,6-Trichlorophenol |
4 |
ug/1 |
||||
Trimethyl phosphate |
2 |
ug/1 |
||||
Vinyl chloride |
0.02 |
ug/1 |
*metals are measured as total metals |
Statutory Authority: RCW 90.48.035. 90-22-023, § 173-200-040, filed 10/31/90, effective 12/1/90.