Yakima Regional Stormwater Working Group (RSWG)


Regular Meetings

Regular meetings are held quarterly at the Yakima County Courthouse. Due to COVID-19, meetings will be held virtually until further notice. The next meeting will be held Thursday, March 25th, 2021 from 1-2 pm. If you would like to attend the next meeting please call (509) 574-2300. 

This meeting will be held virtually and can be accessed by going to:  

You can also dial in using your phone:  United States: +1 (408) 650-3123 

Access Code: 265-845-685 


The Yakima Regional Stormwater Group (RSWG) is an advisory group consisting of local elected or appointed officials from Yakima County, and the cities of Selah, Sunnyside, and Union Gap to oversee municipal staff efforts to regionally comply with stormwater permit requirements.

RSWG Accomplishments

The RSWG formed in September of 2005 to reevaluate costs and benefits, if any, to regional governance of stormwater discharge required under a proposed NPDES Phase II permit from the Washington Department of Ecology. With funding provided by an Ecology grant, the RSWG contracted for a Value Engineering report to examine the proposed permit requirements and estimate the cost for each municipality to comply with the minimum requirements of the permit. A followup report (PDF) examined regional savings that could be realized and any extra costs of running a regional program.

Based on favorable findings in these reports, an intergovernmental stormwater agreement (ILA) was signed in July of 2007, providing a basis for the County to provide regional permit compliance services through 2010 to the Cities of Yakima, Union Gap, and Sunnyside. In 2014 the ILA was amended due to the City of Yakima withdrawing from the ILA, and the City of Selah joining. In 2019 the ILA was again amended and the jurisdictions agreed to obtain and hold their own separate municipal stormwater permits but wishes to remain a voluntary ad hoc advisory group. 


Yakima RSWG Meeting Agenda

Yakima RSWG Meeting Minutes