Clark Public Utilities — NPDES permit WA0040932: limits, due date and EPA's record

NPDES permit WA0040932 · Minor NON-POTW · effective, expires 2030-06-30 · EPA's file as of 2026-09-19

EPA's record, 2025-09-01 to 2026-08-31

Last period with anything received: 2026-07-31. Most often over: Mercury, total [as Hg] (2), Arsenic, total [as As] (2), Copper, total [as Cu] (2).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (242)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. centigrade	DAILY MX	report only (alert)	all year
001	Zinc, total [as Zn]	MO AVG	report only (alert)	all year
001	PCB-1016	MAXIMUM	<= .5 ug/L	all year
001	PCB-1221	MAXIMUM	<= .5 ug/L	all year
001	PCB-1232	MAXIMUM	<= .5 ug/L	all year
001	PCB-1242	MAXIMUM	<= .5 ug/L	all year
001	PCB-1248	MAXIMUM	<= .5 ug/L	all year
001	PCB-1254	MAXIMUM	<= .5 ug/L	all year
001	PCB-1260	MAXIMUM	<= .5 ug/L	all year
001	Halogen, total residual	MO AVG	report only (alert)	all year
001	pH, maximum	DAILY MX	<= 8.5 SU	all year
001	pH, minimum	DAILY MN	>= 6.5 SU	all year
001	Flow	DAILY MX	<= .701 MGD	all year
002	Cyanide, total [as CN]	DAILY MX	<= 5 ug/L	all year
002	Sulfide, total [as S]	MAXIMUM	report only (alert)	all year
002	Chloride [as Cl]	MAXIMUM	report only (alert)	all year
002	Arsenic, total [as As]	DAILY MX	<= .1 ug/L	all year
002	Beryllium, total [as Be]	DAILY MX	<= .1 ug/L	all year
002	Cadmium, total [as Cd]	DAILY MX	<= .05 ug/L	all year
002	Chromium, total [as Cr]	DAILY MX	<= 200 ug/L	all year
002	Chromium, total [as Cr]	MO AVG	<= 200 ug/L	all year
002	Copper, total [as Cu]	DAILY MX	<= .4 ug/L	all year
002	Lead, total [as Pb]	DAILY MX	<= .1 ug/L	all year
002	Thallium, total [as Tl]	DAILY MX	<= .09 ug/L	all year
002	Nickel, total [as Ni]	DAILY MX	<= .1 ug/L	all year
002	Silver, total [as Ag]	DAILY MX	<= .04 ug/L	all year
002	Zinc, total [as Zn]	DAILY MX	<= 1000 ug/L	all year
002	Zinc, total [as Zn]	MO AVG	<= 1000 ug/L	all year
002	Antimony, total [as Sb]	DAILY MX	<= .3 ug/L	all year
002	Selenium, total [as Se]	DAILY MX	<= 1 ug/L	all year
002	Chromium, hexavalent dissolved [as Cr]	DAILY MX	<= .3 ug/L	all year
002	Dichlorobromomethane	DAILY MX	<= 2.2 ug/L	all year
002	Carbon tetrachloride	DAILY MX	<= 2.8 ug/L	all year
002	1,2-Dichloroethane	Single Rdg	report only (alert)	all year
002	Bromoform	DAILY MX	<= 4.7 ug/L	all year
002	Dibromochloromethane	DAILY MX	<= 3.1 ug/L	all year
002	Chloroform	DAILY MX	<= 1.6 ug/L	all year
002	Toluene	DAILY MX	<= 6 ug/L	all year
002	Benzene	DAILY MX	<= 4.4 ug/L	all year
002	Phenolics, total	Single Rdg	report only (alert)	all year
002	Acenaphthylene	DAILY MX	<= 3.5 ug/L	all year
002	Acenaphthene	DAILY MX	<= 1.9 ug/L	all year
002	Acrolein	DAILY MX	<= 5 ug/L	all year
002	Acrylonitrile	DAILY MX	<= 1 ug/L	all year
002	Anthracene	DAILY MX	<= 1.9 ug/L	all year
002	Benzo[b]fluoranthene	DAILY MX	<= 4.8 ug/L	all year
002	Benzo[k]fluoranthene	DAILY MX	<= 2.5 ug/L	all year
002	Benzo[a]pyrene	DAILY MX	<= 2.5 ug/L	all year
002	Bis[2-chloroethyl] ether	DAILY MX	<= 5.7 ug/L	all year
002	Bis[2-chloroethoxy]methane	DAILY MX	<= 5.3 ug/L	all year
002	Bis[2-chloroisopropyl] ether	DAILY MX	<= 5.7 ug/L	all year
002	Butyl benzyl phthalate	DAILY MX	<= 2.5 ug/L	all year
002	Chlorobenzene	DAILY MX	<= 6 ug/L	all year
002	Chrysene	DAILY MX	<= 2.5 ug/L	all year
002	Diethyl phthalate	DAILY MX	<= 1.9 ug/L	all year
002	Dimethyl phthalate	DAILY MX	<= 1.6 ug/L	all year
002	1,2-Diphenylhydrazine	DAILY MX	<= 5 ug/L	all year
002	Ethylbenzene	DAILY MX	<= 7.2 ug/L	all year
002	Fluoranthene	DAILY MX	<= 2.2 ug/L	all year
002	Fluorene	DAILY MX	<= 1.9 ug/L	all year
002	Hexachlorocyclopentadiene	DAILY MX	<= 2 ug/L	all year
002	Hexachloroethane	DAILY MX	<= 1.6 ug/L	all year
002	Indeno[1,2,3-cd]pyrene	DAILY MX	<= 3.7 ug/L	all year
002	Isophorone	DAILY MX	<= 2.2 ug/L	all year
002	Methyl bromide [Bromomethane]	DAILY MX	<= 5 ug/L	all year
002	Methyl chloride [Chloromethane]	DAILY MX	<= 1 ug/L	all year
002	Methylene chloride	DAILY MX	<= 2.8 ug/L	all year
002	N-Nitrosodi-N-propylamine	DAILY MX	<= .5 ug/L	all year
002	N-Nitrosodiphenylamine	DAILY MX	<= 1 ug/L	all year
002	N-Nitrosodimethylamine [NDMA]	DAILY MX	<= 2 ug/L	all year
002	Nitrobenzene	DAILY MX	<= 1.9 ug/L	all year
002	Phenanthrene	DAILY MX	<= 5.4 ug/L	all year
002	Pyrene	DAILY MX	<= 1.9 ug/L	all year
002	Tetrachloroethylene	DAILY MX	<= 4.1 ug/L	all year
002	1,1-Dichloroethane	DAILY MX	<= 4.7 ug/L	all year
002	1,1-Dichloroethylene	DAILY MX	<= 2.8 ug/L	all year
002	1,1,1-Trichloroethane	DAILY MX	<= 3.8 ug/L	all year
002	1,1,2-Trichloroethane	DAILY MX	<= 5 ug/L	all year
002	1,1,2,2-Tetrachloroethane	DAILY MX	<= 6.9 ug/L	all year
002	Benzo[ghi]perylene	DAILY MX	<= 4.1 ug/L	all year
002	Benzo[a]anthracene	DAILY MX	<= 7.8 ug/L	all year
002	1,2-Dichlorobenzene	DAILY MX	<= 1.9 ug/L	all year
002	1,2-Dichloropropane	DAILY MX	<= 6 ug/L	all year
002	trans-1,2-Dichloroethylene	DAILY MX	<= 1.6 ug/L	all year
002	1,2,4-Trichlorobenzene	DAILY MX	<= 1.9 ug/L	all year
002	Dibenz[a,h]anthracene	DAILY MX	<= 2.5 ug/L	all year
002	1,3-Dichlorobenzene	DAILY MX	<= 1.9 ug/L	all year
002	1,4-Dichlorobenzene	DAILY MX	<= 4.4 ug/L	all year
002	2-Chloroethyl vinyl ether, [mixed]	DAILY MX	<= 1 ug/L	all year
002	2-Chloronaphthalene	DAILY MX	<= 1.9 ug/L	all year
002	2-Chlorophenol	DAILY MX	<= 3.3 ug/L	all year
002	Di-n-octyl phthalate	DAILY MX	<= 2.5 ug/L	all year
002	2,4-Dimethylphenol	DAILY MX	<= 2.7 ug/L	all year
002	2,4-Dinitrotoluene	DAILY MX	<= 5.7 ug/L	all year
002	2,4,6-Trichlorophenol	DAILY MX	<= 2.7 ug/L	all year
002	2,6-Dinitrotoluene	DAILY MX	<= 1.9 ug/L	all year
002	3,3'-Dichlorobenzidine	DAILY MX	<= 16.5 ug/L	all year
002	4-Bromophenyl phenyl ether	DAILY MX	<= 1.9 ug/L	all year
002	4-Chlorophenyl phenyl ether	DAILY MX	<= 4.2 ug/L	all year
002	4-Nitrophenol	Single Rdg	report only (alert)	all year
002	4,6-Dinitro-o-cresol	DAILY MX	<= 24 ug/L	all year
002	2,3,7,8-Tetrachlorodibenzo-p-dioxin	DAILY MX	<= 1.3 pg/L	all year
002	Naphthalene	DAILY MX	<= 1.6 ug/L	all year
002	Pentachlorophenol	DAILY MX	<= 3.6 ug/L	all year
002	Di[2-ethylhexyl] phthalate [DEHP]	DAILY MX	<= 2.5 ug/L	all year
002	Di-n-butyl phthalate	DAILY MX	<= 2.5 ug/L	all year
002	Benzidine	DAILY MX	<= 44 ug/L	all year
002	Vinyl chloride	DAILY MX	<= 1 ug/L	all year
002	Hexachlorobenzene	DAILY MX	<= 1.9 ug/L	all year
002	Hexachlorobutadiene	DAILY MX	<= .9 ug/L	all year
002	Phenols	DAILY MX	<= 1.5 ug/L	all year
002	Dibenz[a,h]acridine	DAILY MX	<= 2.5 ug/L	all year
002	Dibenzo[a,e]pyrene	DAILY MX	<= 2.5 ug/L	all year
002	Dibenzo[a,h]pyrene	DAILY MX	<= 2.5 ug/L	all year
002	Halogen, total residual	DAILY MX	<= .5 mg/L	all year
002	Halogen, total residual	MO AVG	<= .2 mg/L	all year
002	3-Methylcholanthrene	DAILY MX	<= 2 ug/L	all year
002	4-Chloro-3-methylphenol	DAILY MX	<= 3 ug/L	all year
002	Mercury, total [as Hg]	DAILY MX	<= .0002 ng/L	all year
002	Dibenz[a,j]acridine	DAILY MX	<= 2.5 ug/L	all year
002	Benzo[rst]pentaphene	DAILY MX	<= 1.3 ug/L	all year
002	1,3-Dichloropropene	DAILY MX	<= 5 ug/L	all year
002	Perylene	DAILY MX	<= 1.9 ug/L	all year
002	Benzo[j]fluoranthene	DAILY MX	<= .5 ug/L	all year
002	Trichloroethene	DAILY MX	<= 1.9 ug/L	all year
002	Chloroethane	DAILY MX	<= 1 ug/L	all year
003	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
003	Solids, total suspended	MO AVG	<= 30 mg/L	all year
003	Oil and grease, hexane extr method	DAILY MX	<= 20 mg/L	all year
003	Oil and grease, hexane extr method	MO AVG	<= 15 mg/L	all year
WELL	Cyanide, total [as CN]	Single Rdg	report only (alert)	all year
WELL	Sulfide, total [as S]	MAXIMUM	report only (alert)	all year
WELL	Chloride [as Cl]	MAXIMUM	report only (alert)	all year
WELL	Arsenic, total [as As]	Single Rdg	report only (alert)	all year
WELL	Beryllium, total [as Be]	Single Rdg	report only (alert)	all year
WELL	Cadmium, total [as Cd]	Single Rdg	report only (alert)	all year
WELL	Chromium, total [as Cr]	Single Rdg	report only (alert)	all year
WELL	Copper, total [as Cu]	Single Rdg	report only (alert)	all year
WELL	Lead, total [as Pb]	Single Rdg	report only (alert)	all year
WELL	Thallium, total [as Tl]	Single Rdg	report only (alert)	all year
WELL	Nickel, total [as Ni]	Single Rdg	report only (alert)	all year
WELL	Silver, total [as Ag]	Single Rdg	report only (alert)	all year
WELL	Zinc, total [as Zn]	Single Rdg	report only (alert)	all year
WELL	Antimony, total [as Sb]	Single Rdg	report only (alert)	all year
WELL	Selenium, total [as Se]	Single Rdg	report only (alert)	all year
WELL	Chromium, hexavalent dissolved [as Cr]	Single Rdg	report only (alert)	all year
WELL	Dichlorobromomethane	Single Rdg	report only (alert)	all year
WELL	Carbon tetrachloride	Single Rdg	report only (alert)	all year
WELL	1,2-Dichloroethane	Single Rdg	report only (alert)	all year
WELL	Bromoform	Single Rdg	report only (alert)	all year
WELL	Dibromochloromethane	Single Rdg	report only (alert)	all year
WELL	Chloroform	Single Rdg	report only (alert)	all year
WELL	Toluene	Single Rdg	report only (alert)	all year
WELL	Benzene	Single Rdg	report only (alert)	all year
WELL	Phenolics, total	Single Rdg	report only (alert)	all year
WELL	Acenaphthylene	Single Rdg	report only (alert)	all year
WELL	Acenaphthene	Single Rdg	report only (alert)	all year
WELL	Acrolein	Single Rdg	report only (alert)	all year
WELL	Acrylonitrile	Single Rdg	report only (alert)	all year
WELL	Anthracene	Single Rdg	report only (alert)	all year
WELL	Benzo[b]fluoranthene	Single Rdg	report only (alert)	all year
WELL	Benzo[k]fluoranthene	Single Rdg	report only (alert)	all year
WELL	Benzo[a]pyrene	Single Rdg	report only (alert)	all year
WELL	Bis[2-chloroethyl] ether	Single Rdg	report only (alert)	all year
WELL	Bis[2-chloroethoxy]methane	Single Rdg	report only (alert)	all year
WELL	Bis[2-chloroisopropyl] ether	Single Rdg	report only (alert)	all year
WELL	Butyl benzyl phthalate	Single Rdg	report only (alert)	all year
WELL	Chlorobenzene	Single Rdg	report only (alert)	all year
WELL	Chrysene	Single Rdg	report only (alert)	all year
WELL	Diethyl phthalate	Single Rdg	report only (alert)	all year
WELL	Dimethyl phthalate	Single Rdg	report only (alert)	all year
WELL	1,2-Diphenylhydrazine	Single Rdg	report only (alert)	all year
WELL	Ethylbenzene	Single Rdg	report only (alert)	all year
WELL	Fluoranthene	Single Rdg	report only (alert)	all year
WELL	Fluorene	Single Rdg	report only (alert)	all year
WELL	Hexachlorocyclopentadiene	Single Rdg	report only (alert)	all year
WELL	Hexachloroethane	Single Rdg	report only (alert)	all year
WELL	Indeno[1,2,3-cd]pyrene	Single Rdg	report only (alert)	all year
WELL	Isophorone	Single Rdg	report only (alert)	all year
WELL	Methyl bromide [Bromomethane]	Single Rdg	report only (alert)	all year
WELL	Methyl chloride [Chloromethane]	Single Rdg	report only (alert)	all year
WELL	Methylene chloride	Single Rdg	report only (alert)	all year
WELL	N-Nitrosodi-N-propylamine	Single Rdg	report only (alert)	all year
WELL	N-Nitrosodiphenylamine	Single Rdg	report only (alert)	all year
WELL	N-Nitrosodimethylamine [NDMA]	Single Rdg	report only (alert)	all year
WELL	Nitrobenzene	Single Rdg	report only (alert)	all year
WELL	Phenanthrene	Single Rdg	report only (alert)	all year
WELL	Pyrene	Single Rdg	report only (alert)	all year
WELL	Tetrachloroethylene	Single Rdg	report only (alert)	all year
WELL	1,1-Dichloroethane	Single Rdg	report only (alert)	all year
WELL	1,1-Dichloroethylene	Single Rdg	report only (alert)	all year
WELL	1,1,1-Trichloroethane	Single Rdg	report only (alert)	all year
WELL	1,1,2-Trichloroethane	Single Rdg	report only (alert)	all year
WELL	1,1,2,2-Tetrachloroethane	Single Rdg	report only (alert)	all year
WELL	Benzo[ghi]perylene	Single Rdg	report only (alert)	all year
WELL	Benzo[a]anthracene	Single Rdg	report only (alert)	all year
WELL	1,2-Dichlorobenzene	Single Rdg	report only (alert)	all year
WELL	1,2-Dichloropropane	Single Rdg	report only (alert)	all year
WELL	trans-1,2-Dichloroethylene	Single Rdg	report only (alert)	all year
WELL	1,2,4-Trichlorobenzene	Single Rdg	report only (alert)	all year
WELL	Dibenz[a,h]anthracene	Single Rdg	report only (alert)	all year
WELL	1,3-Dichlorobenzene	Single Rdg	report only (alert)	all year
WELL	1,4-Dichlorobenzene	Single Rdg	report only (alert)	all year
WELL	2-Chloroethyl vinyl ether, [mixed]	Single Rdg	report only (alert)	all year
WELL	2-Chloronaphthalene	Single Rdg	report only (alert)	all year
WELL	2-Chlorophenol	Single Rdg	report only (alert)	all year
WELL	2-Nitrophenol	Single Rdg	report only (alert)	all year
WELL	Di-n-octyl phthalate	Single Rdg	report only (alert)	all year
WELL	2,4-Dichlorophenol	Single Rdg	report only (alert)	all year
WELL	2,4-Dimethylphenol	Single Rdg	report only (alert)	all year
WELL	2,4-Dinitrotoluene	Single Rdg	report only (alert)	all year
WELL	2,4-Dinitrophenol	Single Rdg	report only (alert)	all year
WELL	2,4,6-Trichlorophenol	Single Rdg	report only (alert)	all year
WELL	2,6-Dinitrotoluene	Single Rdg	report only (alert)	all year
WELL	3,3'-Dichlorobenzidine	Single Rdg	report only (alert)	all year
WELL	4-Bromophenyl phenyl ether	Single Rdg	report only (alert)	all year
WELL	4-Chlorophenyl phenyl ether	Single Rdg	report only (alert)	all year
WELL	4-Nitrophenol	Single Rdg	report only (alert)	all year
WELL	4,6-Dinitro-o-cresol	Single Rdg	report only (alert)	all year
WELL	2,3,7,8-Tetrachlorodibenzo-p-dioxin	Single Rdg	report only (alert)	all year
WELL	Naphthalene	Single Rdg	report only (alert)	all year
WELL	Pentachlorophenol	Single Rdg	report only (alert)	all year
WELL	Di[2-ethylhexyl] phthalate [DEHP]	Single Rdg	report only (alert)	all year
WELL	Di-n-butyl phthalate	Single Rdg	report only (alert)	all year
WELL	Benzidine	Single Rdg	report only (alert)	all year
WELL	Vinyl chloride	Single Rdg	report only (alert)	all year
WELL	Hexachlorobenzene	Single Rdg	report only (alert)	all year
WELL	Hexachlorobutadiene	Single Rdg	report only (alert)	all year
WELL	Phenols	Single Rdg	report only (alert)	all year
WELL	Dibenz[a,h]acridine	Single Rdg	report only (alert)	all year
WELL	Dibenzo[a,e]pyrene	Single Rdg	report only (alert)	all year
WELL	Dibenzo[a,h]pyrene	Single Rdg	report only (alert)	all year
WELL	3-Methylcholanthrene	Single Rdg	report only (alert)	all year
WELL	4-Chloro-3-methylphenol	Single Rdg	report only (alert)	all year
WELL	Mercury, total [as Hg]	Single Rdg	report only (alert)	all year
WELL	Dibenz[a,j]acridine	Single Rdg	report only (alert)	all year
WELL	Benzo[rst]pentaphene	Single Rdg	report only (alert)	all year
WELL	1,3-Dichloropropene	Single Rdg	report only (alert)	all year
WELL	Perylene	Single Rdg	report only (alert)	all year
WELL	Benzo[j]fluoranthene	Single Rdg	report only (alert)	all year
WELL	Trichloroethene	Single Rdg	report only (alert)	all year
WELL	Chloroethane	Single Rdg	report only (alert)	all year