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
22
Phase II Category 1
(population < 10,000)
24
Phase II Category 2
(population of 10,000 – 50,000)
6
Phase II Category 3
(population > 50,000)
2
Phase I
(population > 100,000)
Latest News and Updates
Job Opportunity: ODOT
JOB ANNOUNCEMENT The Oklahoma Department of Transportation (ODOT) is seeking a new Clean Water Specialist out of the Central Office in Oklahoma City. Details: Interested? Apply here.
INCOG Needs Your Input!
The Indian Nation Council of Governments (INCOG) is currently conducting a statewide survey to gain insight on water infrastructure planning needs across Oklahoma. They are looking to collect as many responses as possible by the end of July. Water infrastructure stakeholders in Oklahoma are requested to provide their input. Oklahoma Water Infrastructure Resilience Survey If…
Job Opportunity: ODOT
JOB ANNOUNCEMENT The Oklahoma Department of Transportation (ODOT) is seeking two new Environmental Field Liaisons- one based in Muskogee and one in Perry. Details: Muskogee Location: Interested? Apply here. Perry Location: Interested? Apply here.
Central Oklahoma Stormwater Alliance, Inc.
EIN # 85-3458893
P.O. Box 42, Oklahoma City, OK 73101
2025-2026 Corporate Member
COSWA 