Environmental Rules in Lafayette, IN (2026)
4 verified environmental rules for Lafayette, Indiana, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Lafayette's Stormwater Code bans discharging anything but stormwater or an exempted flow into the city's drainage system. Municipal Code Section 8.08.210 requires dischargers to use best management practices, and the city can compel additional pollution-prevention measures under its Clean Water Act-based MS4 program.
Lafayette Stormwater Discharge Prohibition
Some RestrictionsLafayette Municipal Code § 8.08.210
No person shall discharge to a waterbody, directly or indirectly, any substance other than stormwater or an exempted discharge. Any person discharging stormwater shall effectively prevent pollutants from also being discharged with the stormwater, through the use of best management practices (BMPs). ... The City of Lafayette is authorized to require dischargers to implement pollution prevention ...
Erosion Control
Lafayette requires a Stormwater Pollution Prevention Plan for any project disturbing a half acre or more of land. Municipal Code Sections 8.08.400 and 8.08.410 mandate erosion and sediment control measures, materials-handling procedures, and three-year SWPPP recordkeeping under IDEM's construction general permit.
Lafayette Construction Erosion & Sediment Control
Some RestrictionsLafayette Municipal Code §§ 8.08.400, 8.08.410
Any project located within City of Lafayette that includes clearing, grading, excavation, and other land disturbing activities, resulting in the disturbance of one-half acre or more of total land area, is subject to the requirements of this chapter. ... Effective stormwater pollution prevention on construction sites is dependent on a combination of preventing movement of soil from its original ...
Flood Zones
Lafayette's Stormwater Code layers floodplain-storage protection on top of the county's Unified Zoning Ordinance. Section 8.08.310 requires flood protection grade documentation on final plats and compensatory excavation for fill placed in the 100-year floodplain of streams draining one square mile or more.
Lafayette Floodplain Development Standards
Some RestrictionsLafayette Municipal Code § 8.08.310
B.Grading and Building Pad Elevation Policy. In addition to all floodplain requirements noted in the Unified Zoning Ordinance, FPG applicable to all buildings located within SFHA or an IDNR designated best available data floodplain or regulated adjacent areas (if applicable and if such buildings are allowed under the Unified Zoning Ordinance) shall be shown on the final plat. ... D.No Net Loss ...
Flood Elevation Requirements
Lafayette requires new buildings near mapped floodplains to sit at least two feet above the 100-year flood elevation. Municipal Code Section 8.08.310(B) sets this freeboard for structures near streams, open ditches, and detention ponds, on top of any separate county floodplain zoning standard.
Lafayette 2-Foot Freeboard Requirement
Some RestrictionsLafayette Municipal Code § 8.08.310(B)
For all structures located outside of SFHA or an IDNR designated one hundred (100) year floodplain that are subject to flooding from a stream or an open ditch (an area along a stream with no floodplain designation or an area adjacent to a designated floodplain with ground elevation below one hundred (100) year flood elevation plus two feet), the LAG of all residential, commercial, or industrial...
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