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Flood Plain Information and Mapping

Flood plain inquiries are handled by Public Works, which coordinates mapping with the Federal Emergency Management Agency (FEMA). Here are some resources for flooding and flood plain issues.

Interactive Flood Plain Map Application

We have provided an online 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. View instructions (PDF) for using the application.

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 email

For interpretation of the data contained on the map, please call Terry Curtis at 410-887-3117 or email


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: Sections 32-8-202(a) and 32-8-203(d). New tidal flood plain maps and regulations (PDF) were effective May 5, 2014.

Revised May 16, 2019         


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