Wind River Energy Commission — NPDES permit WY0033740: limits, due date and EPA's record

Crude Petroleum And Natural Gas, Fremont County, Wyoming. NPDES permit WY0033740 expired Jun 30, 2025; its limits still apply. Last 12 months: over a limit 5 times (last June 2026), 24 required values missing, 37 of 38 reports late. Source: EPA ECHO, Oct 22, 2026.

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period ending	Parameter	Reported	Limit	Over by
December 2025	Solids, total dissolved, daily maximum	7280 mg/L	≤ 5000 mg/L	46%
February 2026	Specific conductance, daily maximum	10500 uS/cm	≤ 7500 uS/cm	40%
March 2026	Specific conductance, daily maximum	9540 uS/cm	≤ 7500 uS/cm	27%
April 2026	Specific conductance, daily maximum	9900 uS/cm	≤ 7500 uS/cm	32%
June 2026	Sulfate [as S], daily maximum	2600 mg/L	≤ 2500 mg/L	4%

Limits in force (129)

Parameter	Statistic	Limit	Months	Outfall
Specific conductance	daily maximum	≤ 7500 uS/cm	all year	001
Sulfate [as S]	daily maximum	≤ 2500 mg/L	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Oil & Grease	daily maximum	≤ 10 mg/L	all year	001
Cyanide, total [as CN]	daily maximum	report only (ug/L)	all year	001
Sulfide, total [as S]	daily maximum	report only (mg/L)	all year	001
Chloride [as Cl]	daily maximum	≤ 2000 mg/g	all year	001
Fluoride	daily maximum	report only (mg/L)	all year	001
Arsenic, total [as As]	daily maximum	report only (ug/L)	all year	001
Beryllium, total [as Be]	daily maximum	report only (ug/L)	all year	001
Cadmium, total [as Cd]	daily maximum	report only (ug/L)	all year	001
Cadmium, total [as Cd]	daily maximum	report only (ug/L)	all year	001
Chromium, total [as Cr]	daily maximum	report only (ug/L)	all year	001
Copper, total [as Cu]	daily maximum	report only (ug/L)	all year	001
Lead, total [as Pb]	daily maximum	report only (ug/L)	all year	001
Thallium, total [as Tl]	daily maximum	report only (ug/L)	all year	001
Nickel, total [as Ni]	daily maximum	report only (ug/L)	all year	001
Silver, total [as Ag]	daily maximum	report only (ug/L)	all year	001
Zinc, total [as Zn]	daily maximum	report only (ug/L)	all year	001
Antimony, total [as Sb]	daily maximum	report only (ug/L)	all year	001
Cadmium, total recoverable	daily maximum	report only (ug/L)	all year	001
Selenium, total [as Se]	daily maximum	report only (ug/L)	all year	001
Total phenols	daily maximum	report only (ug/L)	all year	001
Radium 226, total	daily maximum	≤ 60 pCi/L	all year	001
Dichlorobromomethane	daily maximum	report only (mg/L)	all year	001
Carbon tetrachloride	daily maximum	report only (mg/L)	all year	001
1,2-Dichloroethane	daily maximum	report only (mg/L)	all year	001
Bromoform	daily maximum	report only (mg/L)	all year	001
Chloroform	daily maximum	report only (mg/L)	all year	001
Toluene	daily maximum	report only (mg/L)	all year	001
Benzene	daily maximum	report only (mg/L)	all year	001
Acenaphthylene	daily maximum	report only (mg/L)	all year	001
Acenaphthene	daily maximum	report only (mg/L)	all year	001
Acrolein	daily maximum	report only (mg/L)	all year	001
Acrylonitrile	daily maximum	report only (mg/L)	all year	001
Anthracene	daily maximum	report only (mg/L)	all year	001
Benzo[k]fluoranthene	daily maximum	report only (mg/L)	all year	001
Benzo[a]pyrene	daily maximum	report only (mg/L)	all year	001
Bis[2-chloroethyl] ether	daily maximum	report only (mg/L)	all year	001
Bis[2-chloroethoxy]methane	daily maximum	report only (mg/L)	all year	001
Bis[2-chloroisopropyl] ether	daily maximum	report only (mg/L)	all year	001
Butyl benzyl phthalate	daily maximum	report only (mg/L)	all year	001
Chlorobenzene	daily maximum	report only (mg/L)	all year	001
Chlorodibromomethane	daily maximum	report only (mg/L)	all year	001
Chlorodibromomethane	daily maximum	report only (mg/L)	all year	001
Chrysene	daily maximum	report only (mg/L)	all year	001
Diethyl phthalate	daily maximum	report only (mg/L)	all year	001
Dimethyl phthalate	daily maximum	report only (mg/L)	all year	001
1,2-Diphenylhydrazine	daily maximum	report only (mg/L)	all year	001
Ethylbenzene	daily maximum	report only (mg/L)	all year	001
Fluoranthene	daily maximum	report only (mg/L)	all year	001
Fluorene	daily maximum	report only (mg/L)	all year	001
Hexachlorocyclopentadiene	daily maximum	report only (mg/L)	all year	001
Hexachloroethane	daily maximum	report only (mg/L)	all year	001
Indeno[1,2,3-cd]pyrene	daily maximum	report only (mg/L)	all year	001
Indeno[1,2,3-cd]pyrene	daily maximum	report only (mg/L)	all year	001
Isophorone	daily maximum	report only (mg/L)	all year	001
Isophorone	daily maximum	report only (mg/L)	all year	001
Methyl bromide [Bromomethane]	daily maximum	report only (mg/L)	all year	001
Methyl chloride [Chloromethane]	daily maximum	report only (mg/L)	all year	001
Methylene chloride	daily maximum	report only (mg/L)	all year	001
N-Nitrosodi-N-propylamine	daily maximum	report only (mg/L)	all year	001
N-Nitrosodiphenylamine	daily maximum	report only (mg/L)	all year	001
N-Nitrosodimethylamine [NDMA]	daily maximum	report only (mg/L)	all year	001
Nitrobenzene	daily maximum	report only (mg/L)	all year	001
Phenanthrene	daily maximum	report only (mg/L)	all year	001
Pyrene	daily maximum	report only (mg/L)	all year	001
Tetrachloroethylene	daily maximum	report only (mg/L)	all year	001
1,1-Dichloroethane	daily maximum	report only (mg/L)	all year	001
1,1-Dichloroethylene	daily maximum	report only (mg/L)	all year	001
1,1,1-Trichloroethane	daily maximum	report only (mg/L)	all year	001
1,1,2-Trichloroethane	daily maximum	report only (mg/L)	all year	001
1,1,2,2-Tetrachloroethane	daily maximum	report only (mg/L)	all year	001
Benzo[ghi]perylene	daily maximum	report only (mg/L)	all year	001
Benzo[a]anthracene	daily maximum	report only (mg/L)	all year	001
1,2-Dichlorobenzene	daily maximum	report only (mg/L)	all year	001
1,2-Dichloropropane	daily maximum	report only (mg/L)	all year	001
1,2-trans-Dichloroethylene, dry weight	daily maximum	report only (mg/L)	all year	001
1,2,4-Trichlorobenzene	daily maximum	report only (mg/L)	all year	001
Dibenz[a,h]anthracene	daily maximum	report only (mg/L)	all year	001
1,3-Dichlorobenzene	daily maximum	report only (mg/L)	all year	001
1,4-Dichlorobenzene	daily maximum	report only (mg/L)	all year	001
2-Chloroethyl vinyl ether, [mixed]	daily maximum	report only (mg/L)	all year	001
2-Chloronaphthalene	daily maximum	report only (mg/L)	all year	001
2-Chlorophenol	daily maximum	report only (mg/L)	all year	001
2-Nitrophenol	daily maximum	report only (mg/L)	all year	001
Di-n-octyl phthalate	daily maximum	report only (mg/L)	all year	001
2,4-Dichlorophenol	daily maximum	report only (mg/L)	all year	001
2,4-Dimethylphenol	daily maximum	report only (mg/L)	all year	001
2,4-Dinitrotoluene	daily maximum	report only (mg/L)	all year	001
2,4-Dinitrophenol	daily maximum	report only (mg/L)	all year	001
2,4,6-Trichlorophenol	daily maximum	report only (mg/L)	all year	001
2,6-Dinitrotoluene	daily maximum	report only (mg/L)	all year	001
3,3'-Dichlorobenzidine	daily maximum	report only (mg/L)	all year	001
4-Bromophenyl phenyl ether	daily maximum	report only (mg/L)	all year	001
4-Chlorophenyl phenyl ether	daily maximum	report only (mg/L)	all year	001
4-Nitrophenol	daily maximum	report only (mg/L)	all year	001
4,6-Dinitro-o-cresol	daily maximum	report only (mg/L)	all year	001
Phenol	daily maximum	report only (mg/L)	all year	001
Naphthalene	daily maximum	report only (mg/L)	all year	001
Pentachlorophenol	daily maximum	report only (mg/L)	all year	001
Di-n-butyl phthalate	daily maximum	report only (mg/L)	all year	001
Benzidine	daily maximum	report only (mg/L)	all year	001
Vinyl chloride	daily maximum	report only (mg/L)	all year	001
Trichloroethylene	daily maximum	report only (mg/L)	all year	001
Hexachlorobenzene	daily maximum	report only (mg/L)	all year	001
Hexachlorobutadiene	daily maximum	report only (mg/L)	all year	001
Floating solids, waste or visible foam-visual	instantaneous maximum	report only (N=0;Y=1)	all year	001
Solids, total dissolved	daily maximum	≤ 5000 mg/L	all year	001
Mercury, total [as Hg]	daily maximum	report only (ug/L)	all year	001
Mercury, total [as Hg]	daily maximum	report only (ug/L)	all year	001
Mercury, total [as Hg]	daily maximum	report only (ug/L)	all year	001
3,4-Benzofluoranthene	daily maximum	report only (mg/L)	all year	001
Flow, total	30-day average	report only (MGD)	all year	001
Flow, total	daily maximum	report only (MGD)	all year	001
p-Chloro-m-cresol	daily maximum	report only (mg/L)	all year	001
Oil and grease visual	instantaneous maximum	report only (N=0;Y=1)	all year	001
Chloroethane	daily maximum	report only (mg/L)	all year	001
Specific conductance	daily maximum	≤ 7500 uS/cm	all year	002
pH	minimum	≥ 6.5 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Oil & Grease	daily maximum	≤ 10 mg/L	all year	002
Floating solids, waste or visible foam-visual	instantaneous maximum	report only (N=0;Y=1)	all year	002
Flow, total	30-day average	report only (MGD)	all year	002
Flow, total	daily maximum	report only (MGD)	all year	002
Oil and grease visual	instantaneous maximum	report only (N=0;Y=1)	all year	002
Flow, in conduit or thru treatment plant	30-day average	≤ 2.5 MGD	all year	SUM
Flow, in conduit or thru treatment plant	daily maximum	≤ 3 MGD	all year	SUM

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/WY0033740 · MCP: https://passage-data.com/mcp