5 county-level rules, plus city-specific rules for 1 city in Marion County, Indiana.
Verified from official government sources
Marion County operates a separate stormwater utility under the Dept. of Public Works (Unigov). Stormwater management is governed by Indianapolis-Marion County Code and IDEM MS4 stormwater permit. Combined sewer overflows are an active concern in the White River corridor.
Indianapolis requires Rule 5 (327 IAC 15-5) erosion control plans for any land disturbance over 1 acre. DPW Stormwater enforces under Rev. Code Ch. 671. Silt fence + stabilization required.
Marion County has no coastline. White River, Fall Creek, and Eagle Creek floodplains are regulated under Consolidated Zoning §744-700 and FEMA NFIP. 25-ft stream buffers common.
Indianapolis-Marion County has significant flood zones along Eagle Creek, Fall Creek, White River, and their tributaries. Zone AE (SFHA) covers low-lying riparian corridors. The city maintains a Flood Control Districts Zoning Ordinance. Buildings in SFHA must be elevated to or above BFE. Floodplain Development Permits required from the city's Floodplain Administrator.
Marion County regulates grading and drainage under Indianapolis Revised Code Chapter 561 and the Stormwater Specifications Manual. Land-disturbing activity over 1 acre requires a stormwater permit. Drainage cannot be redirected onto adjacent properties.
1 cities in Marion County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
See every category we cover for Marion County — parking, noise, fences, fires, animals, pools, and more.
Marion County Ordinance Hub →