Des Moines · King County
Backflow testing in Des Moines, WA
From the marina to Redondo, Des Moines is split mostly between Highline Water District and Lakehaven Water & Sewer District. Both require annual tests; they just take reports differently. We file with whichever one serves you.
Highline or Lakehaven program
How Des Moines’s backflow program works
The short version, summarized from the utility’s own cross-connection control materials.
Source: Highline Water District / Lakehaven · verified October 2026 ↗Highline Water District serves much of Des Moines and accepts reports by email.
Lakehaven Water & Sewer District serves areas to the south and takes reports through its online Tokay portal.
Annual testing by a certified tester is required either way.
Report submission
Highline customers: emailed to the District. Lakehaven customers: entered in Lakehaven’s online portal. We handle both.
Questions for the utility: (206) 824-0375 (Highline)
On the ground
What we see in Des Moines
Every city’s housing stock and commercial mix shapes what’s in the meter box.
Marina & waterfront
Marinas, docks and piers are on the state’s high-hazard list. Waterfront restaurants and the marina itself typically need RP protection.
Services in Des Moines
Neighborhoods
Serving all of Des Moines
- Marina District
- Redondo
- Zenith
- Woodmont
- Pacific Ridge
- North Hill
- Parkside
FAQ
Des Moines backflow questions
01 Who can test my backflow assembly in Des Moines?
02 How do backflow test reports get submitted to Highline or Lakehaven?
03 How much does backflow testing cost in Des Moines?
04 What if my assembly fails in Des Moines?
Field test report · next due
Des Moines 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.