![]() ![]() In order to protect public health from the risk of backflow, the SDWA works together with the Michigan Plumbing Code requirements to control cross connections. The Michigan Department of Environment, Great Lakes, and Energy (EGLE) oversees public water supply programs to identify and prevent cross connections throughout Michigan. To identify and prevent cross connections in community water supplies, Part 14 of the Michigan Safe Drinking Water Act Administrative Rules (SDWA) prohibits cross connections and requires each water supply to implement a cross connection prevention program including inspections, testing, recordkeeping, and education. Cross Connection Prevention In MichiganĪ cross connection is an unprotected plumbing arrangement through which backflow can occur. ![]() These backflow events have resulted in documented contamination in water systems across the country, but most cases of backflow are left undetected. These are examples of backflow, and contamination during a backflow incident can occur through the plumbing and points of use. Other times, pumps or water heating devices in homes and businesses can overcome the water system pressure. This can result in siphoning of unknown materials into the drinking water. Though difficult to detect, water pressure can sometimes be disrupted causing water to accidentally flow backwards. This helps ensure contamination cannot enter the system through points of connection or leaks. Water distribution systems are designed to operate with continuous positive pressure. ![]()
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