There are nearly 28,000 backflow prevention assemblies on water services in the Tucson Water service area. The Arizona Department of Environmental Quality requires each of these assemblies to be tested annually. This testing is done by private certified testers who have completed and passed a course of study approved by the State.

It is the responsibility of the customer to ensure that the backflow prevention assembly is in proper operating condition at all times. Backflow prevention assemblies must be tested annually. Tucson Water sends notices to customers reminding them when the annual test is due. The customer must contact a Tucson Water-approved certified tester to perform the test. If any repair work or maintenance is performed on the assembly, a certified tester must retest the assembly immediately and submit the test results to Tucson Water.

• List of Tucson Water-Approved Certified Testers (107 Kb PDF; 8 pages, 11 in. x 8-1/2 in.; May 2011)