Call or text (505) 377-4449 Book a test
Mount Rainier rising above a dark evergreen forest and a red barn

Woodinville · King County

Backflow testing in Woodinville — wineries, farms & homes

Woodinville Water District moved to online-only test reports in 2023. Every tester needs District-issued credentials for its WebTest portal before a single report can go in. We have them, so your report gets filed the day we test.

Book a test in Woodinville → (505) 377-4449

Woodinville Water program

How Woodinville’s backflow program works

The short version, summarized from the utility’s own cross-connection control materials.

Source: Woodinville Water District · verified October 2026 ↗
01

Backflow Prevention Assembly Test Reports must be submitted online through the District’s WebTest portal (effective February 1, 2023).

02

Portal usernames are issued by the District to each technician and testing company.

03

Annual testing by a state-certified tester is required under WAC 246-290-490.

→

Report submission

We file through Woodinville Water District’s Tokay WebTest portal.

Questions for the utility: backflowtesting@woodinvillewater.com · (425) 487-4125

On the ground

What we see in Woodinville

Every city’s housing stock and commercial mix shapes what’s in the meter box.

Wineries & tasting rooms

Winery production uses cleaning chemicals, glycol chillers and process water — high-hazard territory. We test premises isolation and equipment assemblies around crush and bottling schedules.

Hobby farms & acreage

Livestock waterers, ponds and big irrigation systems on Sammamish Valley acreage are all cross-connections that need protection.

Services in Woodinville

Neighborhoods

Serving all of Woodinville

  • Downtown Woodinville
  • Hollywood District
  • Tourist District
  • Wellington
  • Leota
  • Sammamish Valley

FAQ

Woodinville backflow questions

01 Who can test my backflow assembly in Woodinville?
Only a Backflow Assembly Tester certified by the Washington State Department of Health. Woodinville Water also needs the tester’s current certification and test-kit calibration on file before it will accept a report — we keep ours current.
02 How do backflow test reports get submitted to Woodinville Water?
We file through Woodinville Water District’s Tokay WebTest portal.
03 How much does backflow testing cost in Woodinville?
Residential tests start at $95 for the first assembly and $60 for each additional assembly on the same visit. Commercial assemblies start at $115 and fire-line assemblies at $145. Filing with Woodinville Water is included.
04 What if my assembly fails in Woodinville?
We show you the reading, quote the repair, and in most cases rebuild and retest on the same visit. The passing retest is what gets filed with Woodinville Water.

Nearby

Backflow testing in Bothell → Backflow testing in Kenmore → Backflow testing in Redmond → Backflow testing in Kirkland →

Field test report · next due

Woodinville 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.

Book a test → (505) 377-4449
Call Text Book a test →