When a water line is connected to equipment containing a nonpotable substance, this is known as a cross-connection. Contamination may occur when water flows through a cross-connection from a nonpotable source, such as a sprinkler system or heating and cooling unit, into the potable water system. This can happen through a process known as backflow.
There are more than 30,000 backflow prevention assemblies in use in the Tucson Water service area. The Arizona Department of Environmental Quality requires that each be tested annually. A list of Tucson Water-approved Certified Testers is available on this website or by calling 520-791-2650 .
- Backflow Prevention Brochure
- Most Requested Information
- Backflow Prevention News
- Cross Connection Control Specialist Zones & Contact Information
- Protect Your Backflow Prevention Assembly
- Irrigation Systems & Backflow Prevention Requirements
- Important Information about Alternative Water Sources and Backflow Assembly Requirements
- Multiple Annual Backflow Prevention Assembly Compliance Date Change Request
Testers and Contractors
- Backflow Assembly Test Results Data Entry, iBAK
- Information for Certified Testers and Contractors
- Construction Backflow Prevention Assembly Policy
- Backflow Prevention - Request for Administrative Appeal form