The MWRD Watershed Management Ordinance includes soil erosion and sediment control requirements for all construction in Cook County. Erosion control plans are required for land-disturbing activities. IEPA NPDES permits may also be required.
The MWRD Watershed Management Ordinance includes comprehensive soil erosion and sediment control provisions applicable to all development in Cook County. Construction projects that disturb soil must implement erosion control measures including silt fences, erosion blankets, and sediment basins. Projects disturbing one or more acres require an IEPA National Pollutant Discharge Elimination System (NPDES) stormwater construction permit. Cook County Building and Zoning requires erosion control plans as part of the building permit process for unincorporated areas. Best management practices (BMPs) must be maintained throughout construction. Post-construction stormwater quality measures may also be required per the Watershed Management Ordinance.
Erosion without controls: stop-work order. IEPA NPDES violation: state enforcement. County fine of $100–$1,000 per offense.
Cook County, IL
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See how Cook County's erosion control rules stack up against other locations.
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