Environmental Rules in Janesville, WI (2026)
1 verified environmental rules for Janesville, Wisconsin, sourced directly from the municipal code and official government pages.
Verified from official government sources
Flood Zones
Janesville participates in the National Flood Insurance Program (NFIP). The City adopted FEMA's revised Rock County Flood Insurance Rate Maps (FIRMs) effective in 2015 and updated its local floodplain zoning ordinance to remain NFIP-compliant. Floodplain regulations are codified in Chapter 42, Article XIV (Floodplain Overlay District), with Shoreland-Wetland Overlay rules in Article XV. The Rock River runs through the City, and approximately 1,065 properties were notified during the 2013-2015 mapping update.
environmental/flood-zones
Heavy RestrictionsLooking for Rock County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Janesville city rules.
Environmental Rules in Rock County →