Extends current water cut-off protections for customers of public water systems with more than 200 customers to customers of all public water systems; prohibits these systems from discontinuing residential water service for nonpayment to a master-metered multifamily residence with at least 4 units or to a master-metered mobilehome park; requires these systems to waive fees for disconnection and reconnection of service for customers under 200% of the federal poverty level.