Clean Water Act discharge permit · NPDES COR429653

TDA VOLUNTARY CLEANUP & REDEVELOPMENT PROGRAM, Thornton, CO: NPDES COR429653 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

TDA VOLUNTARY CLEANUP & REDEVELOPMENT PROGRAM, held by AP Mountain States, LLC, holds NPDES permit COR429653. EPA’s file records it issued January 9, 2026 and expiring March 31, 2029. 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.

What the register holds for TDA VOLUNTARY CLEANUP & REDEVELOPMENT PROGRAM: its NPDES ID, its permit type and status, its dates, its address in Thornton, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR429653.

Identity

Facility as filed	TDA VOLUNTARY CLEANUP & REDEVELOPMENT PROGRAM
Permittee as filed	AP Mountain States, LLC
NPDES ID	COR429653
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 9, 2026
Expiration date	March 31, 2029
Address	Thornton, CO 80229
Subwatershed	City of Thornton-South Platte River (HUC 101900030402)

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

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR429653.

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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES COR429653.

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

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, COR429653.

Start the watch

How we handle your data → Privacy

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 COR429653 there.

Nearby on the register

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

The TDA Voluntary Cleanup & Redevelopment Program permit, held by AP Mountain States, LLC in Thornton, Colorado, is one of 245 general permit coverages on EPA's NPDES register in Jefferson County, and its issue date falls earlier than 79.1% of the 244 other coverages in that county. It sits within the City of Thornton-South Platte River subwatershed alongside 151 NPDES permits, including this one. The permit has no pollutants under a numeric limit and no pollutants with an effluent exceedance.