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Floodplain Information

The City of Johnston participates in the National Flood Insurance Program (NFIP) and has adopted regulations to manage development in floodplains. The floodplain regulations adopted byJohnston establish a flood fringe (FF) overlay district and a flood way (FW) overlay district.  The regulations are found in Chapter 169 of the Zoning Ordinance which outline permissible development in those areas. A floodplain development permit is required.

To determine if your property is within the floodplain, review the Federal Emergency Management Agency (FEMA) Flood Insurance Rate Maps. Copies are available at Johnston City Hall for review. Electronic copies of the maps are also available from FEMA.

For additional floodplain information, please contact the Community Development Department at 515-727-7765 or by email.