Clean Water Act discharge permit · NPDES WY0020451

CODY WASTEWATER LAGOON, Cody, WY: NPDES WY0020451 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
16Pollutants under a numeric limit
5Pollutants with an effluent exceedance

CODY WASTEWATER LAGOON, held by Cody, City of, holds NPDES permit WY0020451. EPA’s file records it issued March 14, 2017 and expiring March 31, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	CODY WASTEWATER LAGOON
Permittee as filed	Cody, City of
NPDES ID	WY0020451
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	March 14, 2017
Expiration date	March 31, 2022
Issuing agency	WDEQ
Address	Cody, WY 82414
Subwatershed	Dry Creek-Shoshone River (HUC 100800140101)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

16Pollutants on file
16Under a numeric limit
16With a violation of any kind
5With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
BOD, 5-day, 20 deg. C	7	108	90	October 31, 2022	340% over the limit
Produced water, oil and grease	2	12	8	March 31, 2021	130% over the limit
BOD, 5-day, percent removal	1	7	4	October 31, 2020	63% over the limit
E. coli	5	8	2	December 31, 2018	17% over the limit
pH	4	7	1	August 31, 2013
Solids, total suspended	4	9	0
Flow	4	6	0
Temperature, water deg. centigrade	2	6	0
Chlorine, total residual	2	3	0
Duration	1	3	0
Nitrogen, ammonia total [as N]	1	2	0
Solids, total dissolved	1	2	0
Oxygen, dissolved [DO]	1	1	0
Nitrogen, Kjeldahl, total [as N]	1	1	0
Nitrite + Nitrate total [as N]	1	1	0
Phosphorus, total [as P]	1	1	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

2Single-event violations

Date	What EPA recorded	Agency
October 14, 2020	Effluent Violations - Numeric effluent violation	ST6
February 27, 2017	WW SSO - Overflow to Dry Land or Building Backup	ST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID WY0020451 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.