IOWA - 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
WORTH
HOWARD
EMMET
LYON
i/VINNEBAGC
ALLAMAKEE
MITCHELL
DICKINSON
WINNE
SHIEK
KOSSUTH
CERRO
GORDO
O'BR EN
PALO
ALTO
CH CKASAW
CLAY
S OUX
HANCOCK
FLOYD
HUMBOLDT
BUENA
VISTA
FRANKLIN
BREMER
CLAYTON
PLYMOUTH
POCA-
HONTAS
BUTLER
WRIGHT
DELAWARE
BLACK
HAWK
GRUNDY I	I BUCHANAN
DUBUQUE
WOODBURY IDA
CALHOUN
JACKSON
JONES
BENTON
MARSHALL
CARROLL i	| BOONE
CRAWFORD i	i GREENE
MONONA
STORY
TAMA
CL NTON
AUDU
BON
HARRISON
DALLAS
POWESHIEK
JOHNSON
POLK
OWA
GUTHRIE
SHELBY
MUSCATINE
WASHING
TON
MAHASKA
WARREN
ADAIR
POTTAWATTAM E
LOUISA
KEOKUK
MARION
MAD SON
HENRY
WAPELLO
CLARKE
M LLS
ADAMS
LUCAS
DES
MOINES
MONT-
GOMERY
MONROE
VAN
BUREN
TAYLOR
DECATUR
APPANOOSE
FREMONT
DAV S
R NGGOLD
WAYNE
Zone 1
Zone 2
Zone 3
IMPORTANT: Consult the publication entitled "Preliminary Geologic Radon
Potential Assessment of Iowa" (USGS Open-file Report 93-292-G) 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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