County of Asotin
Regional Stormwater Program
Inform. Educate. Prevent.
The NPDES Phase II Permit requires that Stormwater Management Plans and Annual Reports are submitted each year to the Department of Ecology by March 31st and made available to the public by May 31st. The public comment period for the Stormwater Management Plan is from March 31st to May 15th. To view the current and past annual reports and Stormwater Management Plans, see the links below. If you have comments on the SWMP or need to view these documents in another format, contact
Regional Stormwater Coordinator
2022 Stormwater Management Plan
2022 Regional Stormwater Program SWMP