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).
To see flood maps for a specific address, visit FEMA's.
IMPORTANT FEMA INFORMATION and LINKS
The National Flood Insurance Program
Flood Mitigation Assistance Grant Program
Letter of Map Amendment & Letter of Map Revision-Based on Fill Process
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
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
Email: email@example.com or 740-474-5823