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

View the Ratepayer Report, April 2008 | Frequently asked questions

Learn more about our career opportunities | summer internships

Sewer Rates for Wastewater Treatment | Capacity Charge

Environmental Stewardship in King County, 2007 DNRP Annual Report

WTD 2007 Accomplishments

53rd Ave. Pump Station Upgrade Project, West Seattle

Hidden Lake Pump Station Replacement and Sewer Improvement Project, Shoreline

Black Diamond Wastewater Infastructure Upgrade

Juanita Bay Pump Station Replacement Project, Kirkland

Ballard Siphon Replacement Project, Seattle

Metropolitan Water Pollution Abatement Advisory Committee (MWPAAC)

Carnation Wastewater Treatment Facility

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

Reclaimed Water Program

Bellevue Force Main Installation Project

Things You Can Do to Protect Your Environment

In the News

King County hosting May 13 public meeting on Black Diamond sewer improvement project

King County supporting project to remove deadly derelict fishing gear from Puget Sound

Public invited to tour Brightwater habitat restoration site on Saturday, May 10

Duwamish Alive! clean-up event breathes new life into historic King County waterway

Sims' sewer rate proposal stresses clean-water investments, continued sound financial practices

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: May 5, 2008

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The details.