The FEMA Preliminary Floodplain Update for Frederick County tool is for general information purposes only and may not be suitable for legal, engineering or surveying purposes. The floodplains shown on this mapping tool are those delineated on the Federal Emergency Management Agency's (FEMA) preliminary Flood Insurance Rate Map (FIRM or floodplain map) for Frederick County that was published in 2018.
This mapping tool is not an effective FIRM. The effective FIRM is produced, maintained and published by FEMA and not by Frederick County Government. Please visit FEMA's Map Service Center at www.msc.fema.gov to view the effective FIRM for Frederick County. For an official floodplain determination, please contact an insurance agent or mortgage lender.
This map is an approximation of the relative location of geographic information, land marks and physical addresses.