Dearborn County, Indiana

Stormwater Ordinances and Technical Standards

To be in compliance with federal and state regulations, Dearborn County adopted the following two ordinances on July 16, 2024:

2024-011 Ordinance to Adopt Stormwater Management Requirements and Standards Pertaining to Municipal Separate Storm Sewer Systems 

2024-012 Ordinance to Adopt the MS4 Fee Schedule and Establish the MS4 Fund 

The Stormwater Technical Standards Manual was finalized by the Dearborn County Technical Standards Committee and approved by the County Commissioners on December 3, 2024. The Dearborn County Stormwater Technical Standards can be found here.  Enforcement of the MS4 Ordinance, Technical Standards and permitting will begin January 1, 2025 for the unincorporated areas of Dearborn County, excluding the towns of Dillsboro, Moores Hill, St. Leon, and West Harrison, which are not considered MS4 communities.  Please note that Aurora, Greendale, Hidden Valley Lake, and Lawrenceburg are permitted separately from Dearborn County.  Please contact those individual entities for their MS4 permitting information.

Qualified Professional Inspector training will be offered by Dearborn County in the first quarter of 2025.  Please visit our Contractor Training Opportunities & Educational Resources page for more information as it becomes available.