Public water systems use backflow prevention assemblies to prevent contaminated water from entering the systems potable water distribution system. State regulations require all backflow prevention assemblies to be inspected and tested by certified assembly testers. For information about how to become a certified tester, review How to Become a Certified Backflow Tester. For general information about backflow prevention, visit the department's Backflow Prevention webpage.
This list is not intended as an endorsement, certification or warranty to any company or product by or from the Missouri Department of Natural Resources.