Wastewater Treatment Division

King County, Washington, protects water quality and prevents water pollution by providing wastewater treatment to 17 cities and 17 local sewer utilities. The county's Wastewater Treatment Division serves about 1.4 million people, including most urban areas of King County and parts of south Snohomish County and northeast Pierce County. Learn more about our system and who we are.

A Clean Water Agency

Our mission is to protect public health and enhance the environment by treating and reclaiming water, recycling solids and generating energy.

Our Wastewater System and Process

Features | News | Site Map

FAQ – the 2009 Budget and its impacts to the Wastewater Treatment Division

Learn more about our career opportunities

New! Sewage Treatment Capacity Charge: you can now pay your bill online.

Kent-Auburn Conveyance System Improvements Project

Bellevue Pump Station Upgrade Project

Productivity Initiative 2007 Annual Report now posted

Juanita Bay Pump Station Replacement Project, Kirkland

Elliott West CSO Facility Emergency Repair, Seattle

King Street Odor Control Project, Seattle

53rd Ave. Pump Station Upgrade Project, West Seattle

Companies earn environmental awards

Kirkland Pump Station and Sewer Upgrade Project

Ravenna Creek Wastewater Spill, Seattle

View the Ratepayer Report, April 2008 | Frequently asked questions

Puget Sound Beach CSO Projects (North Beach, South Magnolia, West Seattle)

Things You Can Do to Protect Your Environment

In the News

Help restore native fish and wildlife habitat at Duwamish Alive! clean-up, planting event, Oct. 11

King County Transfers 1,491 acres of forestland to DNR - Revenue from DNR Management of parcel in Raging River Area will help support King County services (external link)

Gardening tips, plant sale, information and tours offered at South Plant event, Oct. 18

Sewer utility work to close portion of Lake Washington Boulevard, Oct. 11

Family fun, educational activities await at treatment plant open house Oct. 4

More WTD news | DNRP news

System Planning

Wastewater Programs

Our Vision:
Creating Resources from Wastewater

Information, Education, Public Involvement

External Environmental Links and Resources

Web Site Table of Contents (site map)

Information for contractors
and consultants

Bid and RFP Information

Brightwater Construction Contracts

Requesting Design Standards

Utilities Underground Location Center
Call Before You Dig!

Contact information is provided on specific program pages. For questions about the Wastewater Treatment Division Web site, please send an e-mail message or contact us at:

Department of Natural Resources and Parks
Wastewater Treatment Division
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

Updated: October 15, 2008

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The details.