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 by the City of Johnston establishes a general floodplain (FP) overlay district, floodway fringe (FF) overlay district, and a floodway (FW) overlay district. The regulations are found in Chapter 174 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.
Because of the city's floodplain regulations, residents in the city are eligible to purchase flood insurance from the National Flood Insurance Program, please contact your insurance agent about flood insurance or review this link for more information.
For additional floodplain information, please contact the Community Development Department at 515-727-7778 or by email.