Backflow Devices & Testing

A backflow prevention device is designed to protect water supplies from contamination. They are commonly used on lawn irrigation and fire sprinkler systems. Many homes and businesses in the City of Cornelius have a backflow prevention device.

We, your Water Department, protect the water entering your system. However, it is the property owner's responsibility to protect the water on their property and in their home. Oregon Administrative Rule 333-061-0070 states the premise owner shall assume responsibility for testing, maintenance, and repair of the installed approved backflow prevention assembly and that testing shall be done at least annually.

If you need information on locating a certified tester or have any questions, you can call Public Works at 503-357-3011. A list of certified testers and more detailed information about the design and use of backflow prevention devices is located below.

Notice to Testers

The City of Cornelius is pleased to announce we have migrated to a new program that allows you to submit backflow test reports online. Participation is required as of December 1st, 2024. To enroll, navigate to the Tester Registration Website. Once enrolled, tests must be submitted at the following link: SwiftComply: City of Cornelius

From the enrollment page you may:

• Request an admin account
• Request individual Tester accounts
• Submit your Testing Certification and Test Kit Information (Please note these are required to sign up)
• View Frequently Asked Questions

We are happy to answer any questions you may have.