Central Oklahoma Stormwater Alliance, Inc. (COSWA) is a central Oklahoma-based 501(c)(3) non-profit organization composed of MS4s, public agencies, and private businesses that collaborate and pool resources to satisfy OPDES permit obligations on a regional level.


What We Do

We participate in public outreach events to educate our local community about water quality and pollution prevention.

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


2

Phase I MS4s

52

Phase II MS4s

7

Counties

4

Non-Traditional MS4s

Latest News and Updates


City of OKC Virtual Lunch-n-Learn with Advanced Drainage Systems (ADS), April 13th 2022

The City of Oklahoma City Storm Water Quality Management Division is hosting an ONLINE vendor-sponsored Lunch-n-Learn event.  The Virtual Lunch-n-Learn will be held on Wednesday, April 13th at noon, CST. The Sponsor for this event is Advanced Drainage Systems, https://www.adspipe.com is their website.  Advanced Drainage Systems (ADS) is a leading manufacturer of high-performance thermoplastic corrugated pipe and ancillary products,… Continue reading City of OKC Virtual Lunch-n-Learn with Advanced Drainage Systems (ADS), April 13th 2022

Brownfields 2022 Conference, August 16-19 2022

The Brownfields Conference features a dynamic educational program of speakers, discussions, mobile workshops, films and other learning formats that are calibrated to provide you with case study examples, program updates, and useful strategies for meeting your brownfield challenges head on. The exceptional training offered by the Brownfields Conference has something for both beginners and seasoned… Continue reading Brownfields 2022 Conference, August 16-19 2022

FREE OSU Erosion & Sediment Control BMPs & SWP3 Maintenance Course, April 5th 2022

This FREE full-day hybrid workshop combines both classroom and field training. The classroom portion of the training highlights both erosion and sediment control best management practices. It provides students an opportunity to demonstrate their knowledge about the requirements for erosion and sediment control for road construction sites. Students will demonstrate their knowledge about the causes… Continue reading FREE OSU Erosion & Sediment Control BMPs & SWP3 Maintenance Course, April 5th 2022