Report a Spill - Southeast Metro Stormwater Authority

Report a Spill

HOW TO REPORT A SPILL

For emergency spills or hazardous spills call 911.

Reports for illicit discharges in the City of Centennial during business hours:

SEMSWA (303) 858-8844
City of Centennial (303) 325-8000

Reports for illicit discharges in Arapahoe County during business hours:

SEMSWA (303) 858-8844
Arapahoe County (720) 874-6500

Reports for illicit discharges after-hours (City of Centennial and Arapahoe County):

Sheriff’s office: (303) 795-4711
Spill hotline: 1-877-518-5608

IDDE Program & Allowable, Non-Allowable Discharges

With few exceptions listed below, an illicit discharge is any discharge to the storm sewer system not composed entirely of stormwater. Since only…

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