OREGON - 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
TILLAMOOK
LATSO
OLU 
bia 1 WASHINGTON
MULTNOMAH
YAM
R VER
H LL
POLK	\ CLACKAMAS
,	MARION	\	fSHER
LIN" /	V	WASCO \MAN
COLN
GILL-
IAM
UMATILLA
MORROW
ENTO
WALLOWA
L NN
UNION
JEFFERSON
WHEELER
LANE
BAKER
GRANT
CROOK
DESCHUTES
COOS
DOUGLAS
JOSEPHINE
CURRY
KLAMATH
JACKSON
HARNEY
LAKE
MALHEUR
Zone 1
Zone 2
Zone 3
IMPORTANT: Consult the publication entitled "Preliminary Geologic Radon Potential
Assessment of Oregon" (USGS Open-file Report 93-292-J) 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.

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