MARYLAND - EPA Map of Radon Zones
http://www.epa.gov/radon/zonemap.html
The purpose of this map is to assist National, State and local organizations to target their resources and to
implement radon-resistant building codes.
This map is not intended to determine if a home in a given zone should be tested for radon.
All homes should be tested, regardless of zone designation.
CECIL
HARFORD
BALTIMORE
CARROLL
WASHINGTON
BALTIMORE
CITY JM
KENT
ALLEGANY
FREDERICK
HOWARD
/QUEEN
ANNE'S
GARRETT
CAROLINE
ANNE
ARUNDEL
MONTGOMERY
TALBOT
PRINCE
GEORGE'S
CALVERT
WICOMICO
DORCHESTER
CHARLES
fORCESTEl
SOMERSET!1
ST MARY'S
Zone 1
Zone 2
IMPORTANT: Consult the publication entitled "Preliminary Geologic Radon Potential
Assessment of Maryland" (USGS Open-file Report 93-292-C) before using this map.
http://energy.cr.usgs.gov/radon/grpinfo.html This document contains information on radon
potential variations within counties. EPA also recommends that this map be supplemented
with any available local data in order to further understand and predict the radon potential of a
specific area.
Zone 3

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