Cross-Connection/Backflow
City of Sherwood is committed to providing its residents the safest, healthiest, and highest quality water. In order to prevent contamination and keep our water safe throughout the system, we need your help by maintaining your cross-connection backflow device.
Customers who have cross connections are responsible for preventing contaminants from entering the public water system through their individual plumbing system by installing and maintaining approved backflow prevention assemblies. The City of Sherwood requires that you have your backflow device tested once per year to ensure it is working correctly. The link below will take you to for a list of local Oregon Health Authority Certified Backflow Assembly Testers. Testers in other counties are also listed at this site.
Certified testers in Washington County
Scroll to the bottom of this page for a list of the most frequently asked questions about cross connections and backflow prevention.
You Can Help!
Fortunately, there are many things you can do to help prevent contamination of the public water system due to backflow.
Irrigation systems:
• Ensure an approved backflow assembly is installed, is in good working condition and is tested annually.
Swimming pools and hot tubs:
• Ensure that if a water hose is used to fill these units, it is protected with a hose bib vacuum breaker installed on the faucet.
Residential boilers:
• Ensure an approved backflow assembly is installed, is in good working condition, and is tested annually.
Private wells:
• Ensure that well systems are not connected to a public water system. If it is connected, it must have a backflow assembly at the meter, be in good working condition, and tested annually.