FEMA Flood Maps

The City of Portland has received notice from the Federal Emergency Management Agency (FEMA) regarding the revised Flood Insurance Rate Map and Flood Insurance Study for Cumberland County. The purpose of these maps and study is to provide communities with updated flood hazard information that can be used for planning and mitigation.

The preliminary 2017 maps and existing 1986 maps can be viewed on the City of Portland’s Flood Map Viewer. First time here? Read the Flood Map Viewer How To document. 

The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard information produced in support of the National Flood Insurance Program (NFIP). The MSC is a source for official flood maps where you can access a range of other flood hazard products and take advantage of tools for better understanding flood risk.

FEMA flood maps are continually updated through a variety of processes. Effective information that you download or print from this site may change or become superseded by new maps over time. For additional information, please see the Flood Hazard Mapping Updates Overview Fact Sheet.

Paper versions of 2017 preliminary FEMA flood maps for the City of Portland may also be viewed in the Permitting and Inspections Department in Room 315 of City Hall.

For a list of previously issued Letter of Map Change (LOMC) actions please see the Preliminary Summary of Map Actions.