The State of Oregon requires backflow prevention assembly testing to protect the public water system. All approved backflow prevention assemblies must be maintained and tested upon installation, annually, and any time they are repaired. Testing in spring is best when irrigation systems are re-activated for the watering season.

Annual backflow assembly tests are due to the City of North Plains on July 1 annually. Testing must be performed by an Oregon Health Authority-certified Backflow Assembly Tester, and results should be sent to backflow@northplains.org.

Click here for a list of Certified Backflow Assembly Testers for Oregon

What is a backflow prevention assembly?

Backflow prevention on private plumbing systems prevents the undesirable reversal of flow back into the drinking water supply. They can be installed on systems such as, but not limited to, irrigation systems, fire suppression systems, boilers, and wells.