Stormwater/MS4

A municipal separate storm sewer system (MS4) is a system of conveyances (streets, catch basins, curbs, gutters, ditches, storm drains, etc.)  designed or used for collecting or conveying stormwater. The City of Oak Park Heights' system is permitted by the Minnesota Pollution Control Agency. The purpose of the permit is to reduce the discharge of pollutants from entering state waters from stormwater systems.