Water supply: systems; authority as municipal authority; modify. Amends title & secs. 1, 4, 4a, 4b, 4c & 4d of 1955 PA 233 (MCL 124.281 et seq.).

This bill modifies Michigan state law to update the powers and definitions for municipal authorities that manage water supply, sewage disposal, and solid waste systems. It clarifies that these authorities can adopt their own rules, manage property, and issue bonds to fund projects, while also allowing larger systems with over one billion gallons of treatment capacity to create their own law enforcement agencies and enforce penalties for violations. The changes aim to streamline how these public bodies operate and regulate their infrastructure without altering the roles of state health and environmental departments.