2 county-level rules, plus city-specific rules for 1 city in DuPage County, Illinois.
Verified from official government sources
DuPage County administers a countywide stormwater and floodplain ordinance (DuPage County Code Chapter 15), enabled by 55 ILCS 5/5-1062, that regulates land development, detention, floodplain construction, wetlands, and runoff in every municipality and unincorporated area of the county. Adopted after the 1987 and 1991 floods, it is one of the most rigorous county-level stormwater programs in the United States.
DuPage County's Countywide Stormwater and Floodplain Ordinance (Chapter 15) regulates all development within the regulatory floodplain, adopts FEMA FIRM maps as the basis for Special Flood Hazard Area (SFHA) boundaries, and requires the lowest floor of new buildings to sit at least two feet above the base flood elevation. The ordinance, enacted after the catastrophic 1987 and 1996 floods, is among the strictest in Illinois.
1 cities in DuPage County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
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DuPage County Ordinance Hub →