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Why Annual Testing?

The Oregon Health Division and the Washington Department of Health require annual testing of all backflow prevention devices. If testing indicates a failure, businesses or residences are required to repair the equipment and submit it to a new round of testing following repair. 

Although water utilities are responsible for notifying customers when a backflow device is required, it is the customer's responsibility to purchase, install, inspect, maintain, and annually test the backflow assembly. All testing must be performed by state licensed and certified technicians. In some cases, utilities may terminate water service for customers that fail to test and maintain their backflow equipment. 

Who Enforces the Regulations?

The Oregon Health Division (971-673-0405) and the Washington Department of Health (360-236-3133) enforce the regulations through their individual drinking water sections.

Oregon Administrative Rules
Chapter 333, Division 61, (361-061-0070)

Washington Department of Health, Office of Drinking Water
Public Water Supply Systems, Operators Chapter 70.119

If you have questions regarding annual testing, please contact your local water purveyor.

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  • Why Annual Testing?
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16120 SW 72nd
Portland, OR 97224
TEL (503) 603-9988
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