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Clean Water Act discharge permit · NPDES COR080021

SEMSWA MS4, Centennial, CO: NPDES COR080021 discharge permit, effluent exceedances, inspections, penalties

SEMSWA MS4, held by Southeast Metro Stormwater Authority, holds NPDES permit COR080021, which discharges to Cottonwood Creek To Cherry Creek Lake. EPA’s file records it issued March 10, 2008 and expiring March 9, 2013.

What the register holds for SEMSWA MS4: its NPDES ID, its permit type and status, its dates, its address in Centennial, Colorado, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES COR080021.

Identity

Facility as filedSEMSWA MS4
Permittee as filedSoutheast Metro Stormwater Authority
NPDES IDCOR080021
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramSmall municipal storm sewer systems
IssuedMarch 10, 2008
Expiration dateMarch 9, 2013
AddressCentennial, CO 80112
Receiving waterCottonwood Creek to Cherry Creek Lake
SubwatershedCherry Creek Lake-Cherry Creek (HUC 101900030303)
SIC9511 – Air, Water, & Solid Waste Management

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES COR080021.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES COR080021.

Inspections

EPA’s inspection file holds no inspection for NPDES COR080021.

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 COR080021.

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, COR080021.

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Nearby on the register

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

What this page shows

Among the 23 storm water small MS4s permits in Arapahoe County, including the SEMSWA MS4 permit, 0.0% carry a recorded violation. The Cherry Creek Lake-Cherry Creek subwatershed holds 70 NPDES permits, and 8.7% of the 23 storm water small MS4s permits in Arapahoe County were issued before this permit.