Questions about backflow prevention?

Send us an email or call 541-685-7000 then press 5, 1, 1.

Keeping your water drinkable

When you turn on your tap, you expect the water to be pure, safe and tasty. To ensure this, the state of Oregon and EWEB require the installation and annual testing of all backflow-prevention assemblies to protect the public water supply from contamination.

See Oregon Administrative Rule 333-061-0070 for more information.

Annual testing

You may have received a letter reminding you about this annual testing requirement. We offer two ways to test your backflow-prevention assembly:

When you sign up for convenient EWEB-facilitated backflow-assembly testing, you will receive a postcard notifying you that a state-certified testing contractor has been assigned to complete the annual test. The testing fee will be added to your EWEB bill after test results are received.

If an assembly fails the test, there is risk of contamination. Your building pipes would be the first water system to be contaminated if an assembly is not working. The state-certified testing contractor will notify you immediately if repair is needed. The assembly must be repaired as soon as possible and not more than 10 days after the failed test.