Clean Water Act discharge permit · NPDES KS0090956

COLWICH, CITY OF (WWTP), Colwich, KS: NPDES KS0090956 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
3Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

COLWICH, CITY OF (WWTP), held by COLWICH, CITY OF, holds NPDES permit KS0090956, which discharges to Cowskin Cr (1103001314). EPA’s file records it issued June 1, 2017 and expiring May 31, 2022.

COLWICH, CITY OF (WWTP), Colwich, Kansas: Individual permit KS0090956, held by COLWICH, CITY OF; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued June 1, 2017, term to May 31, 2022, by Kansas Department of Health and Environment (KDHE); discharges to Cowskin Cr (1103001314); Sewage Treatment Facilities.

BOD, 5-day, 20 deg. C: 6 limits, 68 violations of any kind, 59 effluent exceedances, latest August 31, 2026, largest 390% over the limit.
Solids, total suspended: 6 limits, 23 violations of any kind, 14 effluent exceedances, latest August 31, 2026, largest 100% over the limit.
E. coli: 2 limits, 6 violations of any kind, 3 effluent exceedances, latest January 31, 2024, largest 530% over the limit.
Nitrogen, total [as N]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
Nitrite + Nitrate total [as N]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
pH: 2 limits, 3 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 2 limits, 3 violations of any kind, 0 effluent exceedances.

February 24, 2026: Evaluation (S).

Kansas holds 454 Publicly owned treatment works coverages of this permit type in EPA’s file; 72 were issued before KS0090956.

Coverages issued nearest KS0090956

April 1, 2017: STAFFORD, CITY OF (WWTP), Stafford, KS0028231, held by STAFFORD, CITY OF
April 1, 2017: ARLINGTON, CITY OF (WWTP), Arlington, KS0049760, held by ARLINGTON, CITY OF
April 1, 2017: KANSAS CITY (PLANT NO. 14) WWTP, Kansas City, KS0080209, held by UNIFIED GOV OF KC/WY CNTY
April 1, 2017: FUN VALLEY (WWTP), Hutchinson, KS0080586, held by HUTCHINSON, CITY OF
April 1, 2017: HARDTNER, CITY OF (WWTP), Hardtner, KS0081086, held by HARDTNER, CITY OF
June 1, 2017: PECK IMPROVEMENT DISTRICT (WWTP), Peck, KS0098256, held by PECK IMPROVEMENT DISTRICT
July 1, 2017: CLEARWATER, CITY OF (WWTP), Clearwater, KS0022365, held by CLEARWATER, CITY OF
July 1, 2017: HESSTON, CITY OF (WWTP), Hesston, KS0022799, held by HESSTON WASTEWATER PLANT
July 1, 2017: WALTON, CITY OF (WWTP), Walton, KS0026140, held by WALTON, CITY OF
July 1, 2017: BUCKLIN, CITY OF (WWTP), Bucklin, KS0026166, held by BUCKLIN, CITY OF

COLWICH, CITY OF (WWTP) among its neighbors

EPA’s permit file holds 15 discharge permits in the Headwaters Cowskin Creek subwatershed (HUC 110300130102), KS0090956 among them. Its county holds 662, 5 of them major permits; KS0090956 is a minor permit.

Other permits in the Headwaters Cowskin Creek subwatershed (HUC 110300130102)

119TH ADDITION, Maize: KSR122062, minor permit, permit term to July 31, 2027
ABENGOA BIOENERGY CO. LLC, Colwich: KS0081329, minor permit, discharging to ARKANSAS RIVER, permit term to September 30, 2014
ANDALE READY MIX, INC. (WATER), Andale: KSG110069, minor permit, permit term to September 30, 2022
ANDALE, CITY OF (WWTP), Andale: KS0092223, minor permit, discharging to Cowskin Cr (1103001314), permit term to June 30, 2022
ARVADA ADDITION, Maize: KSR121014, minor permit, permit term to July 31, 2027
CARDINAL COLWICH, LLC (WW), Colwich: KS0101524, minor permit, discharging to Cowskin Cr (1103001314), permit term to June 30, 2024
ELEMENT, LLC, Colwich: KSR001158, minor permit, permit term to July 31, 2022
EVERGY - GORDON EVANS ENERGY CTR, Colwich: KS0000604, minor permit, discharging to Cowskin Cr (1103001314), permit term to December 31, 2023
ICM, INC. (STORMWATER), Colwich: KSR000366, minor permit, permit term to October 31, 2021
SADDLE RIDGE, Andale: KSR122980, minor permit, permit term to July 31, 2027

Identity

Facility as filed	COLWICH, CITY OF (WWTP)
Permittee as filed	COLWICH, CITY OF
NPDES ID	KS0090956
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	June 1, 2017
Expiration date	May 31, 2022
Issuing agency	Kansas Department of Health and Environment (KDHE)
Address	Colwich, KS 67030
Receiving water	Cowskin Cr (1103001314)
Subwatershed	Headwaters Cowskin Creek (HUC 110300130102)
NAICS	221320 – Sewage Treatment Facilities
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

9Pollutants on file
9Under a numeric limit
9With a violation of any kind
3With 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	6	68	59	August 31, 2026	390% over the limit
Solids, total suspended	6	23	14	August 31, 2026	100% over the limit
E. coli	2	6	3	January 31, 2024	530% over the limit
Nitrogen, total [as N]	2	4	0
Nitrogen, Kjeldahl, total [as N]	2	4	0
Nitrite + Nitrate total [as N]	2	4	0
Phosphorus, total [as P]	2	4	0
pH	2	3	0
Nitrogen, ammonia total [as N]	2	3	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES KS0090956.

Inspections

Date	What EPA recorded	Agency
February 24, 2026	Evaluation	S

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES KS0090956.

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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES KS0090956 held by COLWICH, CITY OF (WWTP) in Colwich, KS, which discharges to Cowskin Cr (1103001314) and is administratively continued. The listed figures are a discharger class of Minor, 3 pollutants under a numeric limit, and 3 pollutants with an effluent exceedance.