Environmental Rules in Indiana (2026)

Indiana's IDEM administers statewide NPDES stormwater permitting under IC 13-18-3 and 327 IAC 15, requiring MS4…

Unincorporated Clark County bans nearly all non-stormwater discharges into its MS4 storm sewer system under Code §…

Fishers requires all site drainage, grading, and stormwater systems to follow the city's Stormwater Management…

Fort Wayne bans dumping anything but stormwater into its storm drains, ditches and rivers, with fines up to $2,500 per…

Hamilton County bans discharging anything but stormwater into the county's storm drains, regulated drains, or…

Hendricks County's Stormwater Management Ordinance regulates development, illicit discharges, and drainage design…

LaPorte County's Chapter 52 Stormwater Management ordinance requires a permit and an approved Stormwater Management…

Porter County's stormwater ordinance, Chapter 20 of the county code, bars illicit discharges and illegal connections…

Any new development, redevelopment or land-disturbing activity in unincorporated Vanderburgh County that adds more than…

Elkhart County's Uniform Requirements for Post Construction Stormwater Management cover any unincorporated property…

Evansville requires a Notice of Intent letter and a city-approved construction plan before any project disturbing one…

Marion County's Stormwater Management District regulates drainage and collection across the consolidated city, funded…

Lake County regulates stormwater and drainage through Ordinance 1500A, its 2024 Stormwater Management and Clean Water…

South Bend sits on the St. Joseph River with an aging combined sewer system, and a 2012 federal consent decree drives…

St. Joseph County requires a Storm Water Pollution Prevention Plan (SWPPP) before any land-disturbing construction of…

Unincorporated Tippecanoe County requires a stormwater management permit before land-disturbing construction, under the…

LaPorte County requires an approved Erosion and Sediment Control Plan before any construction on a project site…

Clark County requires a grading permit and an approved erosion and sediment control plan before any land disturbing…

Elkhart County requires a stormwater clearance from the Soil and Water Conservation District before any building…

Before disturbing under an acre of land in Evansville, property owners must install erosion and sediment control…

Fishers bans mud, dirt, and dust from construction sites from tracking onto public streets and requires contractors to…

Fort Wayne requires a land disturbance permit and an approved stormwater pollution prevention plan before any grading…

Any construction site in unincorporated Hamilton County disturbing an acre or more of land needs an approved stormwater…

Hendricks County requires a stormwater pollution prevention plan (SWPPP) with erosion and sediment control measures…

Construction sites in the Consolidated City must minimize erosion, stabilize exposed soil within set deadlines, and…

Porter County requires an Erosion Control Permit under UDO Section 7.15 (EC-01) before any land-disturbing activity of…

Grading and earthwork in South Bend answer to two systems. A site of one acre or more needs a site development permit…

St. Joseph County's sediment and erosion control chapter ties every construction site's erosion plan to Indiana's Rule…

Vanderburgh County Code Chapter 15.44 bars any land disturbing activity in the unincorporated county until erosion and…

Building a permanent structure in, or removing water or material from, Lake Michigan or any Indiana navigable waterway…

Excavating, filling, or building over, along, or lakeward of the shoreline of a public freshwater lake in…

Indiana Code 14-28-1 requires DNR Division of Water permits for any construction, fill, or excavation in a regulated…

The St. Joseph River floodway runs straight through downtown South Bend. Under Indiana's Flood Control Act, IC…

Any development activity in a Clark County special flood hazard area needs a floodplain development permit before work…

Fort Wayne bans new subdivisions inside the mapped floodway outright and allows floodway-fringe subdivisions only after…

Hamilton County's floodplain ordinance covers every special flood hazard area shown on the county's November 19, 2014…

Hendricks County's Chapter 151 Flood Hazard ordinance establishes Primary and Secondary Floodplain Districts based on…

Before any development activity begins in a mapped special flood hazard area (SFHA) in Marion County, the property…

LaPorte County requires a floodplain development permit before any grading, filling, construction or structural…

Porter County requires a Floodplain Development Permit before any construction, filling, or land alteration inside a…

Tippecanoe County requires a separate permit for every building, mobile home, or man-made change to land within its…

Vanderburgh County requires a Floodplain Development Permit before any grading, filling, construction or structural…

Evansville requires a floodplain development permit before any construction, fill, grading, or land-disturbing activity…

Fishers reviews every building permit application for new construction, substantial improvements, or major repairs…

Unincorporated Lake County requires a floodplain development permit from the Floodplain Administrator before any…

Any construction, fill, grading or land-disturbing activity wholly or partly inside a mapped special flood hazard area…

A boat dock on Eagle Creek Reservoir, the city-owned reservoir inside Indianapolis, needs city sign-off before it goes…

A dock for noncommercial watercraft is allowed countywide as a zoning accessory use, but Section 17.12.070(C) caps how…

In unincorporated Elkhart County, idling a tractor within 500 feet of a residence between 9:00 p.m. and 6:00 a.m. is a…

New or substantially improved buildings in Clark County's mapped flood hazard areas must have their lowest floor at or…

Section 153.07 requires large subdivisions in Tippecanoe County's flood plain, more than 50 lots or five acres, to…

Vanderburgh County sets its Flood Protection Grade at the FEMA base flood elevation plus two feet of freeboard, and new…

Evansville sets its flood protection grade at base flood elevation plus two feet of freeboard, and requires new or…

New homes and additions in Hamilton County's mapped flood hazard areas must have their lowest floor built two feet…

New construction and substantially improved buildings in Indianapolis and Marion County's mapped flood hazard areas…

In unincorporated Lake County's Special Flood Hazard Areas, new or substantially improved residential structures must…

In LaPorte County's special flood hazard areas, new and substantially improved homes must have their lowest floor…

New or substantially improved residential structures in Porter County's flood hazard areas must set the lowest floor…

New and substantially improved residential structures in South Bend's mapped flood hazard areas must have their lowest…

New or substantially improved homes in St. Joseph County's Zone A and Zone AE flood areas must have their lowest floor…