Southeast Metro Stormwater Authority


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The Southeast Metro Stormwater Authority (SEMSWA) provides Stormwater Management Services to property owners in the City of Centennial, unincorporated Arapahoe County*, and a small portion of northern Douglas County**.

SEMSWA’s purpose is to:
• Protect people and property from flooding
• Comply with federal environmental regulations
• Provide a funding mechanism for stormwater services

Click image to view map

SEMSWA was formed in 2006 by an Intergovernmental Agreement among the following entities:
• City of Centennial
• Arapahoe County
• Arapahoe Water and Waste Water Authority
• East Cherry Creek Valley Water and Sanitation District
• Inverness Water and Sanitation District

On our website, you will find information related to:
• Stormwater Basics
• Federal Environmental Regulations
• SEMSWA’s service area
• Why SEMSWA was formed
• SEMSWA’s Responsibilities, Services and Resources
• Stormwater Fees
• Development Fees
• SEMSWA’s Board of Directors and staff; Board Meeting Agendas and Minutes

*Unincorporated portions in the western, urbanized part of the County
**Property within the Inverness Business Park

VIEW VIDEO Click on the image above to view a video of flooding within the Authority area (2 MB)

WHAT'S NEW
Scoop the Poop! Pet waste is biodegradable but contains bacteria that can cause illness. When pet waste is not picked up, rain and sprinkler runoff carry the bacteria across lawns, into gutters, down storm drains, and into local creeks. Water in storm drains is not treated to remove bacteria harmful to people and the environment. When walking your dog, always carry a pooper scooper or plastic bag to pick up after your pet. And, remember to pick up waste in your own yard. SEMSWA has free pet waste bags in an easy to use container. Pick one up at our office at 76 Inverness Dr E, Ste A.