Environmental Rules in Warrick County, IN (2026)
4 rules for unincorporated Warrick County, Indiana.
Verified from official government sources
Stormwater Management
Warrick County bans illicit discharges and illicit connections into its municipal separate storm sewer system (MS4) under Chapter 53, enforced by the County Department of Stormwater Management. Violators face civil fines up to $2,500 per day plus attorney's fees and abatement costs.
Warrick County Illicit Stormwater Discharge Ban
Significant RestrictionsWarrick County Code § 53.06(A)(1); § 53.99(A)
(A) Prohibition of illegal discharges. (1) No person shall discharge or cause to be discharged into a MS4 conveyance, waterbodies, or watercourses, directly or indirectly, any materials, including, but not limited to, pollutants or waters containing any pollutants that cause or contribute to a violation of applicable water quality standards, other than stormwater. ... (A) Any person found...
Erosion Control
Any land-disturbing activity of one acre or more in unincorporated Warrick County needs a stormwater approval with an erosion and sediment control plan before work starts. Cut and fill slopes cannot exceed 3:1, and violations draw civil fines of up to $2,500 per day.
Erosion Control Required for 1+ Acre Sites
Significant RestrictionsWarrick County Code § 54.08(A); § 54.13(D)
(A) Applicability. This applies to all land-disturbing activities within the MS4 jurisdiction with a land disturbance greater than or equal to one acre, or disturbances of less than one acre of land that are part of a larger common plan of development or sale if the larger common plan will ultimately disturb one or more acres of land. ... (D) Grading, erosion control practices, sediment con...
Flood Zones
In unincorporated Warrick County, Indiana, any development in a mapped floodway or floodplain must comply with the county's separate Floodplain Management Ordinance, cross-referenced at County Code § 56.16. The Local Floodplain Administrator, the Executive Director of the Warrick County Area Plan Commission, oversees floodways under one square mile; the Indiana DNR governs larger watersheds. Storing hazardous or toxic material in a floodway or floodplain is banned outright under § 53.11.
Warrick County Floodplain Development Rules
Some RestrictionsWarrick County Code §§ 53.11, 56.05, 56.16
Storage or stockpiling of hazardous or toxic material within any watercourse, or in its associated floodway or floodplain, is prohibited. ... FLOODWAY. ... The channel of any river, stream, creek, or ditch, and those portions of the floodplain adjoining the channel which are reasonably required to convey the 100-year flood flow without increasing the water surface elevation of the 100-year floo...
Flood Elevation Requirements
Warrick County's drainage code sets the yardsticks for flood elevation: it defines Flood Protection Grade as the base flood elevation plus two feet, and requires drainage plans to show the FIRM-mapped regulatory base flood elevation and flood zone under § 56.12. Detention and retention basins built under § 56.21 must carry a minimum one-half-foot freeboard above the design storm's high water level.
Warrick County Base Flood Elevation Rules
Some RestrictionsWarrick County Code §§ 56.05, 56.12, 56.21
BASE FLOOD ELEVATION. The elevation delineates the flooding level from the 100-year flood. ... FLOOD PROTECTION GRADE (i.e., FPG). The base flood elevation (i.e., the 100-year flood elevation) plus two feet. ... FREEBOARD. The vertical distance between a surface or water level and the top of whatever contains or restrains it. Freeboard is a safety feature that provides storage capacity and prev...
All Warrick County ordinances
See every category we cover for Warrick County: parking, noise, fences, fires, animals, pools, and more.
Warrick County Ordinance Hub →