Floodplain Management
Flooding is the most frequent and costly natural disaster in Atlanta, and nationwide, nearly 20 percent of homes are at risk for flooding. A multi-year project by the State of Georgia to re-examine Atlanta’s flood risks and develop detailed, digital flood hazard maps was completed in 2014.
The new maps – known as Digital Flood Insurance Rate Maps (DFIRMs) – reflect flood risks. As a result, you and other property owners throughout the City will have up-to-date, reliable, Internet-accessible information about your flood risk, on a property-by-property basis.  
National Flood Insurance Program 
New floodplain maps took effect Sept. 18, 2013 and properties now sit in one of three (3) flood risk categories: decreased floodplain risk, moderate floodplain risk (shaded Zone X), or high floodplain risk, also known as Special Flood Hazard Areas (SFHA). Properties in decreased floodplain risk areas may be exempt from flood insurance requirements. However, FEMA still recommends flood insurance for properties located near the floodplain - 20% of flood-related damage occurs to properties that are "not in the floodplain."
Atlanta City Councilational Floodplain Ordinance (Adopted May 2013) 
The Atlanta City Council enacted legislation in 2013 to create two major categories of floodplains for regulatory purposes: (1) traditional floodplains, (i.e. along a river or creek system) and (2) historically modified floodplains. Floodplains located outside the area served by the City’s combined sewer system are considered Traditional Floodplains. Historically modified floodplains are areas in a combined sewershed in which significant portions of the historic “natural” stream have been enclosed in a pipe and are subject to periods of severe ponding.

Georgia DFIRM
The Georgia DFIRM (Digital Flood Insurance Maps) website provides the opportunity to examine specific properties within the City, as well as the rest of the State.

If you have questions about developing in or around a floodplain, contact the Site Development Division at (404) 330-6249. 

If you have any questions about your flood risk designation or need further information, please see our Frequently Asked Questions Regarding Floodplain document or contact Craig Rethwilm at (404) 546-3291 or via email crethwilm@atlantaga.gov.