Yes. Salt Lake City Public Utilities says backflow prevention assemblies are required to be tested annually, under the state plumbing code and drinking water regulations, and that the test is submitted to the water supplier. Its page says preventers are required to be tested annually or 10 days after installation. The city lists common cross connections. At homes they include lawn sprinkling systems, hoses and hose bibs, pools or hot tubs, and secondary water sources such as wells. At businesses they include fire sprinkling systems, boilers, chillers, and process water (source). The city's 2026 water report says its staff survey irrigation systems, industrial plants, and commercial properties for cross connections (source). If the city sends you a letter asking for a test report, we do backflow testing for homes and businesses.