About This Website

This web site is designed to inform the public about the Stormwater Management Program, established by the City of Asotin, City of Clarkston, and Asotin County.

This site will be updated on a regular basis, so please check back. More information will be added as it is available.

Current Stormwater Management Plan (SWMP)

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 Stormwater Management Plans, see the link below.

2025 Regional Stormwater Program SWMP

Project Highlights

As a part of our program, the Regional Stormwater Maintenance Crew addresses stormwater drainage issues. The slide shows below highlight some projects that were accomplished. Explore our projects here.

Tips For Contractors and Design Professionals

Contractors and Design Professionals get help here to navigate through the requirements of the construction ordinances adopted by City of Asotin, City of Clarkston, and Asotin County.

CONTACT US

If you have any questions, please contact us at 509-243-2071.

REPORT A SPILL

To report a Stormwater problem or a spill, call 509-243-2071. For emergencies, call 911.