King County Water District #90
15606 SE 128th Street
Renton, WA 98059
425-255-9600 Office
Contact via E-mail
Open 8:00am - 4:30pm Monday - Friday

Water District #90 Publications Library

Stay current on Water Quality reports, newsletters and our annual report.

October 17, 2022Four Creeks Consolidation Study

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Four Creeks Consolidation Study
5,889 kb • October 17, 2022

May 28, 2021Saving Water Partnership Annual Report

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Saving Water Partnership Annual Report
4,245 kb • May 28, 2021

December 15, 2020Resources for Customers Seeking Assistance

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Resources for Customers Seeking Assistance
133 kb • December 15, 2020

July 9, 2020Message to Our Customers

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Message to Our Customers
47 kb • July 9, 2020

May 26, 2020Welcome to King County Water District No. 90

January 13, 2020Court Upholds King County Ordinance Requiring Franchise Compensation for Use of Right-of-Way

January 8, 2020King County - Approved to charge Right of Way Rental Fee on Utility Bills

July 27, 2022Leak Adjustment Policy/FAQ

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Leak Adjustment Policy/FAQ
140 kb • July 27, 2022

April 12, 2018Proposed Lakeside Industries Asphalt Plant

November 20, 2017Notice of Utility Rate Increase Due to King County Right-of-Way Rental Fee/Tax

October 17, 2017Eight Benefits of Washington State Sewer & Water Districts

April 29, 2016FAQ Regarding Current Lead Issues

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FAQ Regarding Current Lead Issues
160 kb • April 29, 2016

April 4, 2016Pink Residue

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Pink Residue
129 kb • April 4, 2016

January 24, 2015Privacy Policy

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Privacy Policy
20 kb • January 24, 2015

May 19, 2021Notice to Backflow Customers

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Notice to Backflow Customers
56 kb • May 19, 2021

KCWD90 has partnered with Backflow Solutions, Inc. ("BSI"), a third party contractor, to manage the District's Cross Connection Control Program. BSI provides a web-based tracking program and a more efficient and cost effective means of managing the District's inventory of backflow prevention assemblies.


  • Notifications will come directly from BSI and will have the device and the name of your last tester listed.
  • A Customer Confirmation Number ("CCN") will be assigned so you. The CCN allows you to access your records and verify the annual test report has been submitted. Customer Portal
  • Annual test compliance is the end of June of every year. 
  • Your certified tester will need to upload the test report with BSI online. There is a fee associated with uploading. 

QUESTIONS? Call or Email: 

BSI Online (800) 414- 4990

KCWD90 (425) 255-9600

April 26, 2018KCWD90 Cross-Connection Control Program per WAC 246 290 490

April 24, 2018Reduced Pressure Backflow Assembly RPBA

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Reduced Pressure Backflow Assembly RPBA
247 kb • April 24, 2018

April 15, 20192019 Backflow Testers

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2019 Backflow Testers
107 kb • April 15, 2019

April 24, 20182018 Backflow FAQ

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2018 Backflow FAQ
97 kb • April 24, 2018

April 24, 20182018 Backflow Test Report

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2018 Backflow Test Report
132 kb • April 24, 2018

April 24, 2018Double Check Valve Assembly (DCVA)

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Double Check Valve Assembly (DCVA)
371 kb • April 24, 2018

Do you have or need to have a backflow device? For most customers a DCVA (Double Check Valve Assembly) is exactly what you need. Specifications and details for DCVA installation can be found here.

May 11, 2016List of Approved Backflow Prevention Assemblies

October 17, 20222022 Summer Newsletter

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2022 Summer Newsletter
147 kb • October 17, 2022

October 17, 20222022 Winter Newsletter

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2022 Winter Newsletter
137 kb • October 17, 2022

September 1, 20212021 Summer Newsletter

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2021 Summer Newsletter
405 kb • September 1, 2021

April 29, 20212021 Spring Newsletter

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2021 Spring Newsletter
534 kb • April 29, 2021

January 27, 20212021 Winter Newsletter

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2021 Winter Newsletter
497 kb • January 27, 2021

January 31, 20202020 Winter Newsletter

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2020 Winter Newsletter
1,504 kb • January 31, 2020

December 5, 20192019 November/December Newsletter

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2019 November/December Newsletter
6,295 kb • December 5, 2019


Dick Gidner Retiring as Commissioner

Time to Winterize

Qualify for Low Income / Disabled Rate

September 23, 20192019 Fall Newsletter

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2019 Fall Newsletter
3,037 kb • September 23, 2019

March 27, 20192019 Spring Newsletter

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2019 Spring Newsletter
2,176 kb • March 27, 2019

September 21, 20182018 Fall Newsletter

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2018 Fall Newsletter
1,080 kb • September 21, 2018

April 2, 20182018 Winter Newsletter

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2018 Winter Newsletter
264 kb • April 2, 2018

November 20, 20172017 Fall Newsletter

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2017 Fall Newsletter
6,468 kb • November 20, 2017

January 27, 20172017 Winter Newsletter

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2017 Winter Newsletter
990 kb • January 27, 2017

November 23, 20162016 Fall Newsletter

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2016 Fall Newsletter
6,046 kb • November 23, 2016

November 23, 20162016 Fall Newsletter

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2016 Fall Newsletter
125 kb • November 23, 2016


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January 14, 20162016 Winter Newsletter

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2016 Winter Newsletter
6,014 kb • January 14, 2016

June 16, 20152015 Spring Newsletter

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2015 Spring Newsletter
225 kb • June 16, 2015

January 24, 20152014 Fall Newsletter

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2014 Fall Newsletter
464 kb • January 24, 2015

January 24, 20152014 Summer Newsletter

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2014 Summer Newsletter
9,259 kb • January 24, 2015

Summer 2014 Newsletter

January 24, 20152013-14 Winter Newsletter

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2013-14 Winter Newsletter
1,245 kb • January 24, 2015
  • 5% General Rate Increase beginning January 1, 2014
  • Construction Project's Hightlight = Tank Painting and Main Replacement

January 24, 20152013 Summer Newsletter

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2013 Summer Newsletter
505 kb • January 24, 2015

January 24, 20152012-13 Winter Newsletter

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2012-13 Winter Newsletter
396 kb • January 24, 2015

Articles in the 2012-2013 Winter Newsletter include:

  • 2013 Rate Increase Annoucement
  • What our employees say about working at KCWD90

January 24, 20152012 Summer Newsletter

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2012 Summer Newsletter
3,297 kb • January 24, 2015

Articles in the 2012 Summer Newsletter include:

  • A Message from your Finance Manager
  • Pay by Phone and On-Line Bill Pay Update
  • First annual Report of Low Income and Disabled Rates

January 24, 20152012 Fall Newsletter

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2012 Fall Newsletter
1,656 kb • January 24, 2015

Articles included in the Fall Newsletter 2012 Include:

  • Meet your Commissioner - Dick Gidner
  • District Recognizes Joshua Deraitus for Innovation
  • District Recognized Sam Amira, Commissioner Accrediation Award

February 19, 20152011-12 Winter Newsletter

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2011-12 Winter Newsletter
643 kb • February 19, 2015

The 2011 Winter Newsletter includes updates about the following:

  • Rates will increase about 7% beginning January 1, 2012.
  • The District will be adding credit card and pay-by-phone starting the first quarter of 2012.
  • KCWD 90 announces our new District Superintendent.

October 17, 20222022 Schedule of Charges

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2022 Schedule of Charges
153 kb • October 17, 2022

January 22, 20212021 Schedule of Charges

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2021 Schedule of Charges
404 kb • January 22, 2021

January 8, 20202020 Schedule of Charges

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2020 Schedule of Charges
56 kb • January 8, 2020

March 1, 20192019 Schedule of Charges

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2019 Schedule of Charges
56 kb • March 1, 2019

February 7, 20182018 Schedule of Charges

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2018 Schedule of Charges
56 kb • February 7, 2018

September 11, 20172017 Schedule of Charges (Revised)

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2017 Schedule of Charges (Revised)
119 kb • September 11, 2017

January 7, 20162016 Schedule of Charges

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2016 Schedule of Charges
119 kb • January 7, 2016

January 24, 20152014 Schedule of Charges

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2014 Schedule of Charges
117 kb • January 24, 2015

January 24, 20152013 Schedule of Charges

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2013 Schedule of Charges
118 kb • January 24, 2015

January 24, 20152012 Schedule of Charges

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2012 Schedule of Charges
39 kb • January 24, 2015

October 17, 20222022 Water Availability Certificate Application Form

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2022 Water Availability Certificate Application Form
394 kb • October 17, 2022

Please use the above link to access the PDF form. The form may also be completed online using the following link: 

January 6, 2021Application & Affidavit for Reduction in Water Rates

December 30, 2019Automatic Payment Plan Application Form

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Automatic Payment Plan Application Form
41 kb • December 30, 2019

October 28, 2019Leak Adjustment Request Form - 2019

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Leak Adjustment Request Form - 2019
66 kb • October 28, 2019




Frequently Asked Questions (FAQ)


1)   Who is responsible for the leak? The District’s responsibility, as far as the water distribution system is concerned, ends at the water meter. The customer owns the service line from the meter to the residence. Repair of leaks along the service line or in the house are the customer’s responsibility.

2)   Will I be notified if I have a leak? The District makes every effort to notify customers that a leak may be present. District Staff is “flagged”  by the “Conintuous Flow Report”, provided by Neptune 360, which notifies the District staff that there may be a leak at the customers location. Notification of a potential leak by the District is considered a courtesy, and not a requirement. Ultimately, it is the responsibility of the homeowner to determine if their higher usage is due to a leak.


3)   Can I get an adjustment for my water bill? Since our community’s water supply is limited and using it efficiently is of prime importance, we urge customers to repair all leaks promptly. To support our customers in this endeavor, the District offers a one-time leak adjustment (Review No. 6). Leak adjustments are applied to one billing period (two months). However, if the same leak extends into a second billing period, a second leak adjustment can be considered. In no instance will a leak period longer than two billing periods (four months) be considered for adjustment.


4)   How long do I have to repair my leak? To qualify for the leak adjustment, leaks must be repaired within 30 days from the District’s leak notification or 30 days from the time the customer detects the leak.

  5)   What type of leak qualifies for an adjustment? Leak adjustments are for leaks in the service line only (from the meter to the house). Leak adjustments do not include irrigation/sprinkler systems, running toilets, faucets, water heaters, hoses, or other above-ground or in the home systems.


6)   How often can I get a leak adjustment? The owner is eligible for a one-time leak adjustment during the life of the user’s service line. A new owner is eligible for a one-time leak adjustment on the same service line the previous owner received. Although, if a second leak is discovered and the owner replaces the total service line (meter to the house) a second adjustment can be considered once documentation or inspection by the District verifies the replacement. Please note, consideration to approve additional leak adjustments is on a case-by-case basis and is at the sole discretion of the General Manager.


7)   How do I qualify for a leak adjustment? To be eligible for the leak adjustment, a customer’s usage must be at least $50 above an average bill. To initiate the process, the customer must complete the District’s Leak Adjustment Request Form. (To download the application from our Website go to Applications tab. Copies of receipt(s) from the plumber or contractor’s work and materials used in the repair must be submitted along with the Leak Adjustment Request form. Once the District office has received the request form, our Field staff will verify that work has been completed and the service line is no longer leaking.


8)   How is a leak adjustment calculated? The leak adjustment is calculated by collecting the previous three-year consumption history (or the number of years of history available up to three years). This billing history is used to calculate an “average water usage” for the same billing period during the previous years.
The average water usage figure is then deducted from the leak water bill usage. Next, the cost of additional water purchased from Seattle Public Utilities is determined. Credit is calculated that is equal to the amount billed, less both the customer’s average consumption and the cost of additional water purchased by the District. The leak adjustment is then applied to the customer’s current bill, and a copy of the adjustment is sent to the customer.


9)   Where do I start? The first step is to find a plumber or contractor that can help you identify and fix the leak or plan to fix the leak yourself. The District encourages customers to call more than one contractor to get competitive quotes.


10) What if I have more questions? Stop by the office Monday through Friday, 8:00 a.m. to 4:30 p.m., call (425) 255-9600 or email us at

January 19, 2017Records Request Form

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Records Request Form
87 kb • January 19, 2017

February 19, 2015Field Application Fill-in-able

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Field Application Fill-in-able
36 kb • February 19, 2015

January 24, 2015Office Employment Application

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Office Employment Application
35 kb • January 24, 2015

Office Employment Application in pdf

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