PDX BackflowFind a Tester

Multnomah · Washington · Clackamas County

Got a backflow testing reminder letter? Get it handled.

Oregon requires an annual test of your backflow prevention assembly by an OHA-certified tester. Skip the raw state list — browse certified testers near you and call one directly to schedule.

Find a Tester to CallWhat is this test?

Independent service — not affiliated with the Portland Water Bureau or the Oregon Health Authority. Learn more.

How it works

  1. 1

    Browse testers in your county

    We list OHA-certified testers for Multnomah, Washington, and Clackamas counties in one place.

  2. 2

    Call to schedule

    Tap to call a tester directly — no forms, no waiting on a callback. (Online booking is coming soon.)

Why this is required

Oregon law (OAR 333-061) requires every backflow prevention assembly to be tested annually by an OHA-certified Backflow Assembly Tester. Property owners are responsible for scheduling it, and water purveyors have the authority to disconnect service for non-compliance. The Portland Water Bureau sends reminder letters each spring but does not perform tests itself.

What is backflow testing? →What does it cost? →What if I ignore the letter? →

Ready to get it off your plate?

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