By reducing combined sewer overflows into local water bodies, King County is protecting public health and the environment.

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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

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Real Time CSO Notification

Library

CSO Control Program brochure, April 2007
CSO Control Program brochure, April 2007 (950KB)

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Recent updates

King County WTD Recommended CSO Control Plan, October 2011
2010 Annual Report, July 2011

Of interest

Soaking Up Stormwater, Weekday KUOW.org, November 22, 2011
Audio file, features interview with Pam Elardo, King County WTD Director

Related information

Washington State Department of Ecology

CSO frequently asked questions
Focus on Sewage and Stormwater: Protecting Our Waters from Combined Sewer Overflows (PDF)
Describes the issue, State CSO program, National CSO control efforts, summary of Federal CSO policy, and comparison between State and Federal CSO requirements.

WTD publications and resources

Updated: May 20, 2013

FAQs
|Consent decree
|CSO map
|Program components
|Program review, 2010 - 2012
|Water quality assessment and monitoring study
|Controlling CSOs
|Be RainWise
|Projects
|Control requirements
|Library
|Site map

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