The DEQ Surface Water Quality Division staff determines the appropriate permit type for each surface water discharge.
General permits contain effluent limitations protective of most surface waters statewide.
Locations where more stringent requirements are necessary require an individual permit. The following list includes all issued general permits at the time this page was updated. Permits can be downloaded, and then read or printed using Adobe Acrobat Reader. Cooling Water Discharges of noncontact cooling water which comply with the temperature requirements of the Part 4 Rules of the Michigan Act 451. MIG499000 Sand and Gravel Mining Wastewater Discharges of sand and gravel mining wastewater, including mine dewatering water and process generated wastewater.