NORTH DAKOTA - EPA Map of Radon Zones
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.
Homes with elevated levels of radon have been found in all three zones.
All homes should be tested, regardless of zone designation.
http://www.epa.gov/radon/zonemap.html
DIVIDE
BURKE
BOTTINEAU
RENVILLE
ROLETTE
CAVALIER
PEMBINA
TOWNER
WILLIAMS
WALSH
MCHENRY
PIERCE
RAMSEY
WARD
BENSON
GRAND
FORKS
NELSON
MCKENZIE
MCLEAN
EDDY
SHERIDAN
WELLS
MERCER
DUNN
FOSTER
GRIGGS
STEELE
BILLINGS
OLIVER
GOLDEN
VALLEY
BURLEIGH
KIDDER
STUTSMAN
STARK
BARNES
CASS
MORTON
SLOPE
HETTINGER
LOGAN
LA MOURE
RANSOM
GRANT
EMMONS
BOWMAN
ADAMS
RICHLAND
SIOUX
MCINTOSH
DICKEY
SARGENT
Zone 1
Zone 2
Zone 3
IMPORTANT: Consult the publication entitled "Preliminary Geologic Radon Potential
Assessment of North Dakota" (USGS Open-file Report 93-292-H) before using this
map. See 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.

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