Michigan administers federal stormwater rules under Part 31 of NREPA, requiring statewide MS4 and construction permits that local rules cannot weaken.
MCL 324.3103 and 324.3106 give EGLE authority to issue NPDES stormwater discharge permits for municipal separate storm sewer systems (MS4s), construction sites disturbing one acre or more, and industrial activities. Permittees must implement six minimum control measures, including post-construction runoff controls. Local stormwater ordinances must meet or exceed state standards but cannot authorize discharges prohibited by EGLE.
Violations carry civil penalties up to $25,000 per day under MCL 324.3115 plus potential criminal liability for knowing discharges.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
See how Saginaw's stormwater management rules stack up against other locations.
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