Clean Water Act discharge permit · NPDES KSR410004

DERBY, CITY OF (MS4), Derby, KS: NPDES KSR410004 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
12Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

DERBY, CITY OF (MS4), held by DERBY STORMWATER PERMIT, holds NPDES permit KSR410004. EPA’s file records it issued December 1, 2019 and expiring November 30, 2024.

DERBY, CITY OF (MS4), Derby, Kansas: Individual permit KSR410004, held by DERBY STORMWATER PERMIT; Effective; issued December 1, 2019, term to November 30, 2024, by Kansas Department of Health and Environment (KDHE); Administration of Air and Water Resource and Solid Waste Management Programs.

Stream stage: 5 limits, 9 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrite + Nitrate total [as N]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Rainfall: 5 limits, 0 violations of any kind, 0 effluent exceedances.
E. coli: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Stream Level: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Stream Velocity: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Stream flow, estimated: 5 limits, 0 violations of any kind, 0 effluent exceedances.
Turbidity, lab, NTU: 5 limits, 0 violations of any kind, 0 effluent exceedances.

DERBY, CITY OF (MS4) among its neighbors

EPA’s permit file holds 34 discharge permits in the Spring Creek-Arkansas River subwatershed (HUC 110300130301), KSR410004 among them. Its county holds 662, 5 of them major permits; KSR410004 is a minor permit.

Other permits in the Spring Creek-Arkansas River subwatershed (HUC 110300130301)

47TH & WEBB SUBSTATION, Derby: KSR112921, minor permit, permit term to December 31, 2017
47TH AND ROCK RD, Wichita: KSR122888, minor permit, permit term to July 31, 2027
AMBER RIDGE ST & PATRIOT AVE - STREET & STORM IMPROVEMENTS, Derby: KSR123224, minor permit, permit term to July 31, 2027
ANDY'S FROZEN CUSTARD DERBY, Derby: KSR123678, minor permit, permit term to July 31, 2027
BLAIR DOON VET CLINIC, Wichita: KSR124242, minor permit, permit term to July 31, 2027
COURTYARDS AT CROSSWATER, Derby: KSR122009, minor permit, permit term to July 31, 2027
CULVER'S DERBY, Derby: KSR123005, minor permit, permit term to July 31, 2027
DECARSKY PARK PH 2 CDS, Derby: KSR122833, minor permit, permit term to July 31, 2027
DERBY - ROCK RD. & 55TH ST., Derby: KSR123586, minor permit, permit term to July 31, 2027
DERBY DESTINATION DEVELOPMENT, Derby: KSR124212, minor permit, permit term to July 31, 2027

Identity

Facility as filed	DERBY, CITY OF (MS4)
Permittee as filed	DERBY STORMWATER PERMIT
NPDES ID	KSR410004
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	December 1, 2019
Expiration date	November 30, 2024
Issuing agency	Kansas Department of Health and Environment (KDHE)
Address	Derby, KS 67037
Subwatershed	Spring Creek-Arkansas River (HUC 110300130301)
NAICS	924110 – Administration of Air and Water Resource and Solid Waste Management Programs
SIC	9511 – Air, Water, & Solid Waste Management

Effluent limits and exceedances

12Pollutants on file
12Under a numeric limit
1With a violation of any kind
0With 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
Stream stage	5	9
Solids, total suspended	5	0
Nitrogen, total [as N]	5	0
Nitrogen, Kjeldahl, total [as N]	5	0
Nitrite + Nitrate total [as N]	5	0
Phosphorus, total [as P]	5	0
Rainfall	5	0
E. coli	5	0
Stream Level	5	0
Stream Velocity	5	0
Stream flow, estimated	5	0
Turbidity, lab, NTU	5	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES KSR410004.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES KSR410004.

Inspections

EPA’s inspection file holds no inspection for NPDES KSR410004.

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 KSR410004.

Watch this permit

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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 KSR410004, held by DERBY STORMWATER PERMIT for DERBY, CITY OF (MS4) in Derby, KS, with the permit status recorded as Effective and the discharger class as Minor. The page lists 12 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit issued December 1, 2019 and expiring November 30, 2024.