Relating to boil water notices issued by public drinking water supply systems.

HB 5609 requires public drinking water systems in Texas to issue boil water notices within 12 hours of discovering health-threatening violations or conditions that could seriously harm human health. If the issue remains unresolved after 48 hours, the system must reissue the notice with details on corrective actions being taken. The bill specifies that notices must follow federal Safe Drinking Water Act requirements for communication methods. This directly affects all public water systems operating in Texas, with the law taking effect on September 1, 2025.