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Flood Plain Information and Mapping

Floodplain inquiries are handled by Public Works, which coordinates mapping with the Federal Emergency Management Agency (FEMA). Find out about important Flood Insurance (PDF) information from FEMA.

Interactive Flood Plain Map Application

We have provided an interactive mapping application to the Digital Flood Insurance Rate Map (DFIRM), which contains the flood plain data as published by FEMA. This application enables users to select, view and print predefined maps and reports about flood plains in Baltimore County. Instructions (PDF) for using this site are provided.

The application also contains data on Letters of Map Amendment (LOMA), Letters of Map Revision (LOMR) and all letters of map change, including the ability to download the LOMA.

If you have problems with the interactive mapping application, please call Doug Adams at 410-887-3451, or send an email to

For interpretation of the data contained on the map, please call David Thomas at 410-887-3984 or send an email to


The data in the DFIRM have an effective date of September 26, 2008 and should be used to comply with the Baltimore County Code 2003, Title 04 Department of Public Works, Subtitle 02 Flood Insurance Rate Maps, Authority: §§ 32 - 8 - 202(a) and 32 - 8 - 203(d). New tidal floodplain maps and regulations (PDF) were effective May 5, 2014.

Revised July 2, 2018         


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