Holiday closure Monday May 28: Most county offices will be closed in observance of Memorial Day.
For questions about the King County CSO Control Program, please contact Karen Huber.

Wastewater Treatment Division
King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855

Get Directions to our office location in Seattle, Washington.

Real Time CSO Notification

CSO Control Program 2012 Plan Review

From 2010 – 2012 the CSO Control Program is completing a review of its Combined Sewer Overflow (CSO) Control Plan.

Wastewater Treatment Division Recommended Combined Sewer Overflow Control Plan

Our recommended plan calls for controlling all King County CSO locations to an average of no more than one overflow per year at each location. To meet this goal, we propose constructing nine projects in the Lake Washington Ship Canal area and in industrial areas near the Duwamish River. We’re recommending that the projects in the Duwamish River area be finished first to support ongoing regional efforts to clean up the river. In addition, we’re recommending that the projects incorporate green stormwater infrastructure where possible and that we meet the schedule recommended in previous plan updates to complete all projects by 2030.

Read entire letter from the Wastewater Treatment Division Director and October 17, 2011 news release.

WTD Recommended CSO Control Plan, October 2011
Read the Plan and learn about:

  • Scope and scale of the recommended CSO control projects
  • How the recommended projects could affect your Seattle neighborhood
  • How CSO Control could affect wastewater rates
  • Request a paper copy.

Technical Memorandums supporting the Recommended Plan For more detailed information mentioned in the Plan go to these links:

A snapshot of recommended CSO control projects
A map of recommended CSO control projects as presented in the plan.

How can you become more involved?

  • Learn more and comment on the recommended plan
  • Find out about other ways to get involved 

 

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Nov. 3, 2011 News release -- County hosts informational meeting on its combined sewer overflow control plan, Nov. 9

Related information

Information about this project is available in Spanish, Korean, Chinese and Vietnamese. Please contact Dana West at 206-684-1097 or TTY Relay: 711.

Information about this project is available in Spanish, Korean, Chinese and Vietnamese. Please select the language text block to view a handout.
Information about this project is available in alternate languages.