Environmental protection: water pollution; penalty for certain excess discharges into waters of the state; provide for. Amends secs. 3112a & 3115 of 1994 PA 451 (MCL 324.3112a & 324.3115) & adds sec. 3119a.

House Bill 4365 amends Michigan's Natural Resources and Environmental Protection Act concerning discharges of untreated or partially treated sewage. It expands the list of parties that sewer system operators must notify immediately (within 24 hours) after a discharge begins, including additional county officials and local newspapers in potentially affected counties. The bill also clarifies requirements for testing affected waters for E. coli to assess public health risks. Violations of these updated notification and testing requirements are subject to existing civil fines ranging from $2,500 to $25,000 per day.