Cross-Connection/Backflow
Customers who have cross connections are responsible for preventing contaminants from entering the public water system by 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 a list of local Oregon Health Authority Certified Backflow Assembly Testers – make sure to filter testers certified in Washington County. We appreciate your help in keeping our water safe!
Submitting Test Reports
NEW FOR 2026! The City of Sherwood is using the Ecosconnect platform to receive backflow test reports. Make sure your backflow tester has your TRAC # so they can submit the test report to us!
Frequently Asked Questions
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.
Welcome to the City of Sherwood’s Notification System, the city’s latest tool for providing residents with immediate information and warnings on water contamination, extreme weather warnings, unexpected road closures, etc. This is a free service provided by the City of Sherwood.