Clean Water Act discharge permit · NPDES COG641084

FOOTHILLS WTF, Douglas County, CO: NPDES COG641084 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
1Pollutants with an effluent exceedance

FOOTHILLS WTF, held by Denver Water, holds NPDES permit COG641084, which discharges to Trib Of Willow Creek. EPA’s file records it issued January 9, 2006 and expiring October 31, 2010. 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	FOOTHILLS WTF
Permittee as filed	Denver Water
NPDES ID	COG641084
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 9, 2006
Expiration date	October 31, 2010
Address	Douglas County, CO 80125
Receiving water	TRIB OF WILLOW CREEK
Subwatershed	Chatfield Reservoir (HUC 101900020703)
Other EPA IDs (FRS)	RCRA handler COR000013599; ICIS-AIR source CO0000000803500443

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

10Pollutants on file
10Under a numeric limit
9With a violation of any kind
1With 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
Chlorine, total residual	2	6	4	March 31, 2024	426% over the limit
Phosphorus, total [as P]	2	11	0
Nitrogen, ammonia total [as N]	2	6	0
pH	2	4	0
Solids, total suspended	2	4	0
Flow, in conduit or thru treatment plant	2	4	0
Fluoride, total [as F]	2	2	0
Oil and grease	1	2	0
Oil and grease visual	1	1	0
BOD, 5-day, 20 deg. C	2	0	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
August 30, 2022	Reporting Violations - Improper/ Incorrect Reporting	ST6
August 30, 2022	Management Practice Violations - Improper Operation and Maintenance	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 COG641084 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES COG641084 for FOOTHILLS WTF in Douglas County, CO, held by Denver Water and discharging to Trib Of Willow Creek within the Chatfield Reservoir subwatershed (HUC 101900020703). The page lists 1 pollutant under a numeric limit and 1 pollutant with an effluent exceedance, with the permit shown as administratively continued and past its October 31, 2010 expiration.