Issaquah · King County
Backflow testing in Issaquah — filed through Tokay WebTest
Issaquah assigns every assembly an account number and its own yearly due date, and mails reminders each month for the assemblies coming due. Reports go in online only. Mail, fax and email stopped being accepted in 2023.
City of Issaquah program
How Issaquah’s backflow program works
The short version, summarized from the utility’s own cross-connection control materials.
Source: City of Issaquah Public Works · verified October 2026 ↗Each property with a backflow assembly gets an account number and a yearly due date; reminder letters go out monthly.
Since January 1, 2023, all test reports must be submitted through the Tokay WebTest portal — not by mail, fax or email.
A failed assembly must be repaired immediately and retested; your account isn’t current until a passing test is received.
If the annual test isn’t performed, the City is required to terminate water service under IMC 13.13 and WAC 246-290-490.
Report submission
We’re registered for Issaquah’s Tokay WebTest portal and enter your results the day we test.
Questions for the utility: backflowreports@issaquahwa.gov · (425) 837-3470
On the ground
What we see in Issaquah
Every city’s housing stock and commercial mix shapes what’s in the meter box.
Highlands & Talus
Master-planned neighborhoods mean HOA-managed irrigation and lots of multifamily fire lines. We work directly with HOAs and their property managers.
Retail & corporate
Gilman Boulevard retail, restaurants and corporate campuses carry RP premises isolation and kitchen equipment protection.
Neighborhoods
Serving all of Issaquah
Some Issaquah-area addresses are served by Sammamish Plateau Water instead of the City.
- Olde Town
- Issaquah Highlands
- Talus
- Squak Mountain
- Gilman
- Central Issaquah
- Providence Point
- Lake Sammamish
FAQ
Issaquah backflow questions
01 Who can test my backflow assembly in Issaquah?
02 How do backflow test reports get submitted to City of Issaquah?
03 How much does backflow testing cost in Issaquah?
04 What if my assembly fails in Issaquah?
Field test report · next due
Issaquah test due? We’ll handle it.
Book online in two minutes. We test, repair if needed, and file the report with your water utility — and remind you next year.