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July 1, 2024804 Zone Water Main Replacement Project

We have completed work on the Renton Suburban Tracts Water Main Replacement Project and have moved on to our next improvements.  

The 804 Zone Water Main Replacement Project is well underway.  This project will be completed in two phases.  They are completing phase one and beginning phase two and will be working through the month of August.  

Once work is completed, roads, driveways and front yards will be restored.

If you have any questions or concerns, please email


February 22, 2022Four Creeks Consolidation Study

The Four Creeks Ranch Water System (FCR) (DOH ID# 22740-4) is a privately owned, Community Group A water system located in unincorporated King County, just south of Issaquah and east of the Renton Highlands, Washington. The system serves approximately 150 residents with 60 active connections, fed from a single on-site well. FCR operates under a Satellite Management Agreement (SMA) with NW Water Systems based out of Port Orchard, WA. Additionally, FCR has a Time and Materials Contract with King County Water District 90 (KCWD90) (PWSID 41150), allowing for occasional water system maintenance and repairs to be performed by KCWD90.

The FCR community has previously had preliminary discussions regarding water system consolidation with KCWD90 and both parties were interested in exploring the possibility further. KCWD90 has since approached FCR to discuss a consolidation where FCR would transfer all water system assets to KCWD90 and KCWD90 would become the water service provider. The relative locations of the FCR and KCWD90 systems are shown on Figure 1 – Vicinity Map. FCR is approximately 1.1 miles east of the easterly edge of the KCWD90 service area boundary and nearest KCWD90 water mains.

The WA-Department of Health (DOH) has issued KCWD90 a Consolidation Feasibility Grant. The purpose of this grant is to fund a preliminary engineering study, public outreach, cultural reviews, identify land acquisition, and feasibility study for Four Creeks Ranch water system to consolidate with KCWD90 water system. A copy of the grant’s Scope of Work is included in the Appendix. This report is intended to satisfy the preliminary engineering study requirement.

To view the Four Creeks Consolidation Study, please click here.










July 10, 2024Water During a Heat Wave

King County Water District 90 (KCWD90) understands how essential water is during a heat wave. It is the policy of KCWD90 not to shut off customers for non-payment during extreme heat events.  When the National Weather Service issues or announces a heat-related alert for the area, the District has options to help customers who have already been shut off.  KCWD90 customers can have their water service reconnected during extreme weather by reaching out to 425-255-9600 or emailing

July 9, 2020Here to Serve Our Entire Community

Clean water is essential to the pursuit of health and happiness and King County Water District No. 90 exists to provide these services to everyone in our community. We serve a diverse population and we want to communicate to you, our customers, that we support equality. 

May 19, 2021Do You Have a Backflow Device?

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.

What does this mean for you as a backflow customer? Click here to find out.

December 15, 2020Resources for Customers Seeking Assistance

This list of resources is available to customers who may need help with utilities, rent, food, etc. We encourage you to pursue these options if you are struggling and need some help.

  1. Bellevue LifeSpring
    Belleve LifeSpring helps with food, clothing, and emergency rent assistance.
    (425) 451-1175

  2. Disaster Cash Assistance Program (DCAP)
    DCAP is available to families or individuals without children who face an emergency and don’t have the money to meet their basic needs. This program is available only once within a 12-month period.

    To apply online, visit and then call 877-501-2233 to complete the required interview. To apply by phone, call 877-501-2233 to complete the entire application process over the phone.

  3. Hopelink
    Housing, transportation, family development, financial assistance, employment programs, and five food banks.
    (425) 869-6000

  4. Issaquah Community Services (ICS)
    Available to residents living within the Issaquah School District. Issaquah Community Services (ICS) helps families with emergency aid to prevent homelessness with rent assistance. It may help pay utility bills, bus tickets and other miscellaneous expenses. Payment is given on behalf of the client; cash is never given.
    (425) 837-3125

  5. King County 24-Hour Crisis Line
    The 24-Hour Crisis Line provides immediate help to individuals, families, and friends of people in emotional crisis.
    (866) 427-4747

  6. King County Food Banks

  7. King County Housing Authority (KCHA)
    KCHA provides rental housing and rental assistance.
    (206) 574-1190

  8. Low Income Home Energy Assistance Program (LIHEAP)
    LIHEAP helps low-income households with their home energy bills.
    (253) 517-2263

  9. Renton Salvation Army
    Electric: (425) 255-5969, Ext. 13
    Rent: (425) 255-5969, Ext. 14

  10. St. Vincent De Paul
    Requests for assistance with rent, utilities, food, etc.
    (206) 767-6449

June 23, 2020Policy Change Notification - Testing for Customers with Backflow Devices

Dear Backflow Customer,

You have been identified as a customer with a backflow device and have been included in our annual backflow testing program. King County Water District No. 90 (the District) plans to make significant changes to its backflow testing program effective immediately. Please read below for details:

Nearly 1,300 of the District's 8,150 customers (about 16%) have backflow devices on their property that ensures water can only flow one direction. This device protects the District's water system from contamination through fire systems, irrigation systems, or commercial properties “pulling” chemicals into the drinking water system, should there be a backflow event (i.e. a main break or a fire). The District is required by Washington Law (RCW 246-290-460) to have a backflow program that identifies properties requiring a backflow device and to ensure that these devices are tested annually.

Starting in the Summer of 2020, the administration of the District's backflow program will be outsourced to a third party, BSI Backflow Solutions, LLC (“BSI”). The BSI program requires that all future test reports be filed online through the BSI portal. Moving forward, both you and your previous tester will be notified by BSI each year of when to submit your annual test. The letter will include a unique customer number that your tester will need in order to file your annual test report online. Starting September 1, 2020, your tester will be required to pay $14.95 to file each backflow test online. Ultimately, this fee will be your responsibility, and not the District's.

In past years, the District has sent out letters on May 1st giving customers 60 days to have their devices tested. This year, due to Covid-19, the District had to delay the program because testers notified us that they were unable to obtain enough personal protective equipment to safely test and meet customers at their homes. As we get back to a more normal schedule, District staff has had to determine how to catch-up on necessary work that was delayed due to the quarantine. The backflow program is extremely time intensive for staff, requiring hundreds of hours of staff time every year. Moving to an online submittal format will save the District a significant amount of time that will be reallocated to other projects.

So far in 2020, the District has already received 430 test reports (out of 1,300 devices or 33%). For those of you who have already submitted your report, this change will not impact you until 2021. Additionally, due to the late notice, we were able to negotiate a one-time “free period” to submit your 2020 test report. This free period will be between August 1 to August 31, 2020. Prior to August 1, completed test reports can be emailed to the District at No test reports will be accepted at the District after July 31.

If you have not submitted your 2020 backflow test report, you can expect your first letter toward the end of July. You do not need to wait for the letter to initiate testing. For your reference, the 2019 list of backflow testers is available on the District's website at

If you have already submitted your 2020 report, your first backflow letter from BSI will arrive in May of 2021. We anticipate that in 2021 we will be on a more normal schedule with backflow letters being issued in early May and tests due by the end of June.

If you have questions, please contact me by email,


Darcey Peterson
General Manager,
King County Water District No. 90