Flood Zones

 FEMA Page


FEMA DFIRM Zone Definition

Flood hazard areas identified on the Flood Insurance Rate Map are identified as a Special Flood Hazard Area (SFHA). SFHA are defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year. The 1-percent annual chance flood is also referred to as the base flood or 100-year flood. SFHAs are labeled as Zone A, Zone AO, Zone AH, Zones A1-A30, Zone AE, Zone A99, Zone AR, Zone AR/AE, Zone AR/AO, Zone AR/A1-A30, Zone AR/A, Zone V, Zone VE, and Zones V1-V30. Moderate flood hazard areas, labeled Zone B or Zone X (shaded) are also shown on the FIRM, and are the areas between the limits of the base flood and the 0.2-percent-annual-chance (or 500-year) flood. The areas of minimal flood hazard, which are the areas outside the SFHA and higher than the elevation of the 0.2-percent-annual-chance flood, are labeled Zone C or Zone X (unshaded).



Online Map Search 1

Online Map Search 2


To see flood maps for a specific address, visit FEMA's.

 Flood Map Service Center

 FEMA MAP Service




The National Flood Insurance Program

NFIP Program


Flood Mitigation Assistance Grant Program


Flood Insurance Manual


Letter of Map Amendment & Letter of Map Revision-Based on Fill Process

Letter of Map Revision

Flood Map Revision Processes

Conditional Letter of Map Revision


Learn more about what how FEMA defines each flood zone in Appendix D, page D-11 of the below document.




IS-9 Managing Floodplain Development Through The National Flood Insurance Program (NFIP) (Page 3-33)



For further Information on

Flood Permits and Special Purpose Flood Damage Reduction Resolution



Pickaway County Building Dept.

124 West Franklin Street

Circleville, OH 43113

P: (740) 477-8282

F: (740) 477-8265



For other information


Online Mapping

Pickaway County GIS Dept

NASA Earth Science Disasters Program Flood Information


The National Risk Index is a dataset and online tool to help illustrate the United States communities most at risk for 18 natural hazards. It was designed and built by FEMA in close collaboration with various stakeholders and partners in academia; local, state and federal government; and private industry. Link


Mapping Questions:


Email: jgillow@pickawaycountyohio.gov or 740-474-5823