MI HB4427

Requires county health officers to notify the county emergency management coordinator within 12 hours of determining that waters contain dangerous levels of E. coli from combined sewer overflow or sanitary sewer overflow events

Mandates emergency management coordinators issue a "brown alert" through the Wireless Emergency Alerts system within 12 hours of receiving notification from health officers

Defines "dangerous level of E. coli" as exceeding 300 E. coli per 100 milliliters of water

Brown alerts must include the location of contamination and information about health risks of exposure

Amends the Emergency Management Act to add these new notification requirements for sewage-related water contamination