Kenmore · King County
Backflow testing in Kenmore — Northshore Utility District
Kenmore’s water comes from Northshore Utility District, which also serves parts of Bothell, Kirkland and unincorporated King County. Northshore notifies owners when a test is due — and can shut off water service if it doesn’t get done.
Northshore UD program
How Kenmore’s backflow program works
The short version, summarized from the utility’s own cross-connection control materials.
Source: Northshore Utility District · verified October 2026 ↗State law requires a certified tester to test every backflow assembly at installation and annually after that.
Northshore’s program applies to most multifamily, commercial and industrial properties.
Single-family homes are included if they have fire protection, irrigation, a boiler, or a structure three or more stories above the meter.
If an assembly isn’t tested when the District requests it, water service may be terminated to protect the public system.
Report submission
We test, complete the field test report, and submit it to Northshore Utility District for you.
Questions for the utility: (425) 398-4400
On the ground
What we see in Kenmore
Every city’s housing stock and commercial mix shapes what’s in the meter box.
Waterfront & marine businesses
Boatyards, marinas and light industry along the north end of Lake Washington are high-hazard connections that typically need RP premises isolation.
Three stories? You’re in
Northshore includes single-family homes with a structure three or more stories above the meter — something a lot of newer townhome owners don’t expect.
Neighborhoods
Serving all of Kenmore
- Downtown Kenmore
- Inglewood
- Moorlands
- Arrowhead
- Uplake
- Kenmore waterfront
- Bothell Way corridor
FAQ
Kenmore backflow questions
01 Who can test my backflow assembly in Kenmore?
02 How do backflow test reports get submitted to Northshore UD?
03 How much does backflow testing cost in Kenmore?
04 What if my assembly fails in Kenmore?
Field test report · next due
Kenmore 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.