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Clean Water Act discharge permit · NPDES COR428124

CFAS DENVER, Aurora, CO: NPDES COR428124 discharge permit, effluent exceedances, inspections, penalties

CFAS DENVER, held by Ryan Companies US Inc, holds NPDES permit COR428124. EPA’s file records it issued July 16, 2025 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 CFAS DENVER: its NPDES ID, its permit type and status, its dates, its address in Aurora, Colorado. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR428124.

Identity

Facility as filedCFAS DENVER
Permittee as filedRyan Companies US Inc
NPDES IDCOR428124
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedJuly 16, 2025
Expiration dateMarch 31, 2029
AddressAurora, CO 80011
SubwatershedCity of Thornton-South Platte River (HUC 101900030402)

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

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR428124.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES COR428124.

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.

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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 COR428124 there.

Nearby on the register

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

What this page shows

This public-records page covers the Clean Water Act NPDES discharge permit COR428124 for CFAS DENVER in Aurora, Colorado, held by Ryan Companies US Inc, with a status of Effective, a Minor discharger class, and coverage under a general permit. EPA's file records issuance on July 16, 2025 and expiration on March 31, 2029, with the subwatershed listed as City of Thornton-South Platte River (HUC 101900030402). The page lists 0 pollutants on file, 0 under a numeric limit, and 0 with a violation.