Backflow prevention assemblies must be tested annually, at a minimum, by a certified Backflow Prevention Assembly Tester. 

The Tahoe City Public Utility District is responsible for protecting the public water supply from contamination or pollution as a result of the backflow of contaminants or pollutants through the customer's water service connection. The cross-connection control program is mandated by the State of California Department of Health Services.

To ensure our water supply is protected from cross-connections, District staff reviews construction plans for potential cross-connections, conducts field inspections of properties for potential cross-connections, inspects the installation of backflow prevention assemblies, monitors the operation of existing assemblies by requiring annual testing and conducts customer education on the importance of cross-connection control.

Backflow prevention assemblies must be tested annually, at a minimum, by a certified Backflow Prevention Assembly Tester. You will receive a notice from the District in advance of the test date. The following links provide you with our list of certified testers that you may hire and the current test report that the tester must use to report the results to the District.

• AWWA Certified Backflow Prevention Assembly Testers (Revised March 2024)
• TCPUD Backflow Prevention Assembly Test Report (Revised April 2019)
• Fire Sprinkler Contractor List (Revised March 2018)
• Cross-Connection Survey (Revised April 2019 )

For More Information

For more information about our cross-connection control program, click on the link below. Or, email: [email protected] or call 530-580-6281. 

• TCPUD Backflow Prevention Program Frequently Asked Questions
• Irrigation Safety Pamphlet

Additional sites of interest:

• The USC Foundation for Cross-Connection Control and Hydraulic Research
• AWWA Backflow Prevention Resource Community
• The American Backflow Prevention Association
• US EPA Cross-Connection Control Manual