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
May 10, 2018
Backflow Information for our Customers
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May 10, 2018
Annual Customer Survey on Water Conservation
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Apr 26, 2018
May 19, 2018, Savvy Gardener Class: Irrigation...Water Efficiently on Saturday 10-11:30 a.m.
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Apr 25, 2018
May 24, 2018, Savvy Gardener Class: Container Gardening Do's & Don'ts
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Apr 12, 2018
Proposed Lakeside Industries Asphalt Plant-Reagan Dunn
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Mar 3, 2018
2018 Savvy Gardener Class Schedule
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Feb 7, 2018
2018 Schedule of Charges
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Oct 17, 2017
Eight Benefits of WA State Sewer & Water Districts
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Apr 27, 2017
King County Ordinance 2016-0521
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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.

What We Are -- Who We Serve

Our Three CommissionersKing 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:
Backflow Information for our Customers

To view current Backflow information go to:

Backflow Program/Did you Know?/Forms/Backflow Information

Proposed Lakeside Industries Asphalt Plant-Reagan Dunn
Frequently Asked Questions:
What if I have a LEAK?


Please note that if a water leak is discovered on the property side of the meter, the homeowner will be responsible for the repair as well as the associated water usage charges. If a leak is discovered in your service line it should be repaired promptly.


To support our customers, the District offers a leak adjustment, which is applied to one billing period only.


To be eligible for a leak adjustment, the leak(s) must be repaired within 30 days of notification and/or discovery, your bill must be at least $50 higher than your average water bill, and the leak cannot be in the internal plumbing of your home or irrigation line.

Please read the FAQ's first to review the qualifications for a leak adjustment. 


The Leak Adjustment FAQ's is under the Forms tab/General Interest.

The Leak Adjustment Request Form is under the Forms tab/Applications.




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