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New Hampshire Radon Zones
Radon is present in New Hampshire properties and we suggest an air
radon and water radon test when buyijng a NH home or NH property.
Rene Brin in Amherst NH can provide you with a list of NH inspectors
that can assist in your NH home inspection and radon testing.
IMPORTANT: Consult the EPA Map of Radon Zones document
(EPA-402-R-93-071) before using this map. 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. Contact your state radon coordinator (go to www.epa.gov/iaq/whereyoulive.html
and click on your state) to see if your state has more detailed
information available. If you have questions about radon in water, see
www.epa.gov/radon/rnwater.html.
Purchasing a property in NH, you should perform a radon test for the existing home for sale.
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 be used 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 geographic location. Important
points to note:
- All homes should test for radon, regardless of geographic location or zone designation
- There
are many thousands of individual homes with elevated radon levels in
Zone 2 and 3. Elevated levels can be found in Zone 2 and Zone 3
counties.
- All users of the map should carefully
review the map documentation for information on within-county
variations in radon potential and supplement the map with locally
available information before making any decisions.
- The map is not to be used in lieu of testing during real estate transactions.
The Map was developed using five factors to determine radon potential:
indoor radon measurements; geology; aerial radioactivity; soil
permeability; and, foundation type. Radon potential assessment is based
on geologic provinces. Radon Index Matrix is the quantitative
assessment of radon potential. Confidence Index Matrix shows the
quantity and quality of the data used to assess radon potential.
Geologic Provinces were adapted to county boundaries for the Map of
Radon Zones.
Sections 307 and 309 of the Indoor Radon Abatement Act of 1988 (IRAA)
directed EPA to list and identify areas of the U.S. with the potential
for elevated indoor radon levels. EPA's Map of Radon Zones assigns each
of the 3,141 counties in the U.S. to one of three zones based on radon
potential:
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