Water supply: systems; switching from private well to public system; prohibit locals from requiring of adult foster care facilities. Amends 1976 PA 399 (MCL 325.1001 - 325.1023) by adding sec. 15a.

SB 66 prohibits local governments from requiring adult foster care facilities (serving 50 or fewer residents) to switch from private wells to public water systems if the well water meets safety standards for volume and contaminants. It amends Michigan's Safe Drinking Water Act to add Section 15a, ensuring facilities with compliant well water cannot be forced to connect to municipal systems. The bill directly affects small adult foster care facilities using private wells that meet state water quality standards. This provision prevents local mandates for water system changes without requiring facilities to adopt public water infrastructure.