Hennepin County requires stormwater management practices on construction and redevelopment sites to protect lakes, rivers, and the Mississippi River watershed under county and watershed district rules.
Projects disturbing one or more acres in Hennepin County must obtain MPCA NPDES coverage and follow the local watershed management organization rules. The county's Stormwater Pollution Prevention Program (SWPPP) targets sediment, phosphorus, and chloride loading. Hennepin County operates a regulated MS4 permit covering county roads and facilities. Watershed districts such as Minnehaha Creek, Bassett Creek, and Nine Mile Creek impose volume control, infiltration, and rate-control standards. Site plans typically require treatment of the first inch of runoff and protection of wetland buffers near Lake Minnetonka and other county waters.
Unpermitted earthwork or untreated discharges may trigger stop-work orders, MPCA referral, and civil penalties enforced through the county and watershed district.
Hennepin County, MN
Hennepin County is fully incorporated - all 45 cities including Minneapolis enforce their own noise ordinances and the county does not have its own countywid...
Hennepin County, MN
Aircraft noise around Minneapolis-St. Paul International Airport is governed by federal FAA rules and the Metropolitan Airports Commission, with mitigation p...
Hennepin County, MN
Hennepin County has no countywide fence-height ordinance because all land is within an incorporated city; each of the 45 cities sets its own fence rules. In ...
Hennepin County, MN
Hennepin County has no county shed ordinance; the county is fully incorporated, so shed rules come from each city. The 2020 Minnesota Residential Code (MN Ru...
Hennepin County, MN
Hennepin County has no county-level carport ordinance because all parcels lie within incorporated cities. Each city regulates carports under its zoning code....
Hennepin County, MN
Hennepin County has no county-level zoning over garage conversions. Since 2012 every parcel sits inside an incorporated city, so each city's zoning code gove...
See how Hennepin County's stormwater management rules stack up against other locations.
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