Central Oklahoma Stormwater Alliance (COSWA) is an organization of MS4s in the Oklahoma City metropolitan area which allows participating MS4s to pool resources to satisfy permit obligations on a regional level.
What We Do
We participate in events and outreach to help teach the local community about water quality and local stormwater issues.
We promote the use of rain barrels to help mitigate pollutant discharges and potential downstream flooding.
We work collaboratively to increase public awareness of stormwater and other environmental issues.
Regulated MS4s in Oklahoma
Phase I MS4s
Phase II MS4s
Latest News and Updates
Are you looking for a quick, easy project that you can do while staying safely socially distanced at home? City of Norman’s community volunteer Amanda Nairn will walk you through the basics of setting up a rain barrel for your garden just in time for summer!
The City of Oklahoma City Storm Water Quality Management Division will host a WEBINAR geared toward Industrial Storm Water permittees. The webinar will begin at 10:00am on Thursday, February 27th, 2020. This webinar is FREE and is expected to last approximately 30-40 minutes, with Q&A. The topic for this webinar will include: Industrial Storm Water Training… Continue reading Industrial Stormwater Webinar
Thanks for joining us last month for the OKC Home & Garden Show; it was a busy weekend but we had a great time talking with everyone! Congratulations to Mustang resident Todd Lannert for winning the rain barrel raffle!