King County Water District #90
15606 SE 128th Street
Renton, WA 98059
425-255-9600  Office
425-277-4128  Fax
King County Water District #90

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Special Notice
Apr 15, 2019
2019 Savvy Gardener Class Schedule
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Dec 18, 2018
West Lake Kathleen Project update - DEC 2018
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Aug 30, 2018
KCWD90 Automatic Payment Plan Application
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W. LK Kath W. M. Impr.
May 10, 2019
West Lake Kathleen Community Update
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Sep 28, 2018
West Lake Kathleen Water Main Improvement Project Map
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Sep 28, 2018
West Lake Kathleen Community Update
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We're glad you're here and hope this website will provide you with useful information about King County Water District #90 -- your local water service provider. 

Mission Statement: The mission of KCWD90 is to provide safe and reliable drinking water to District customers at a reasonable rate.


                                  What We Are -- Who We Serve

Our Three Commissioners    King County Water District #90 (KCWD90) is a Special Purpose District located in the Renton Highlands area of unincorporated King County. The District’s Water Service Area is presently bounded on the west by the City of Renton. Coal Creek Utility District (CCUD) is adjacent to the northwesterly corner of the District’s Water Service Area. To the south, the Cedar River is the boundary between the District and Cedar River Water & Sewer District (CRWSD). Other adjacent water purveyors include the City of Issaquah to the northeast and Mirrormont to the east of the District. The District shares no boundaries with either of these purveyors.

How We Operate
The District is a municipal corporation as set forth in the Revised Code of Washington (RCW) Title 57 and authorized by King County ordinances. The District is subject to Federal, State and Local regulations. Three local citizens are elected to KCWD90’s Board of Commissioners by voters living within the District's Boundaries. The Board of Commissioners establishes District water rates, sets policies, and oversees operations. The Board meets regularly on the first and third Tuesday of each month at 4:30 p.m. All meetings are open to the public. Day-to-day District administrative and operational duties are carried out by a thirteen-member staff, along with consulting engineers and counsel.

LIKE US ON FACEBOOK. Facebook is a great way for our customers to be notified of special updates, emergency outages, boil notices or other Water District related info. Simply click on the box to the left to be taken to KCWD90's Facebook page.

Featured Articles:
KCWD90 Automatic Payment Plan Application



West Lake Kathleen Community Update
Article 1 - Community Update: Click on Links below: Communit ... Read the complete story
Frequently Asked Questions:
What causes Backflow?

Backflow can be caused by a number of situations such as:

  • Fire fighting: The Fire Department hooking up to a hydrant to fight a fire, creating a dramatic increase in demand and pulling all available water toward the hydrant;
  • Main break: High water withdrawal lowering main pressure (e.g., an open hydrant or main flushing).
  • Reduced pressure: A reduction in water pressure on the suction side of a booster pump.

• View All F.A.Q.'s

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