Radon
has always been a hot topic in NH since there is so much granite bedrock in the
State.
Radon is
a colorless, odorless and tasteless gas that occurs naturally. It is a
radioactive gas that is normally found in bedrock. NH home wells are
often drilled into the bedrock so it is very common to test for radon levels at
the time of buying a home. Dug wells normally aren’t a problem and have very little to no radon. 36% of NH residences have a private
well. Radon released from building materials is usually
inconsequential. Radon can seep into a basement through cracks in the
foundation if the house is built above granite ledge. Radon can move to the air from the water source in
your home through showers, humidifiers, etc.
According
to the DES, “Radon is the leading
environmental cause of cancer deaths in the U.S. and the leading cause of lung
cancer in non-smokers.” There is also an increase in stomach cancer from
radon in drinking water.
Formerly,
the Department of Environmental Services recommends that homeowners and buyers
test the indoor air for Radon and consult with radon mitigation companies when
radon exceeds 2,000 picocuries per liter in well water, the lowest advisory
level in the U.S.
Now, as
of 3/14/16, the DES advises to look into treatment if there is more than 10,000
picocuries of radon per liter in well water.
“There are no federal or
state standards for radon in drinking water. However, there are public health
advisories for radon in drinking water, including that issued by USEPA. NHDES
recommends the following:
·
For private wells
with radon concentrations at or above 10,000 pCi/L, the treatment of water is
recommended in conjunction with mitigation of indoor air radon. Homeowners
should consult with radon mitigation and water treatment providers.
·
For private wells
with radon concentrations between 2,000 and 10,000 pCi/L, the treatment of
water may be advisable if air concentrations in the home exceed 4 pCi/L.
·
When radon in
well water is below 4,000 pCi/L, you should retest air and water every three to
five years.”
For more
information visit http://des.nh.gov/organization/commissioner/pip/factsheets/dwgb/documents/dwgb-3-12.pdf
.
Sandy LeRette – Realtor® ABR – Better Homes & Garden Real Estate / The Masiello Group (Licensed Agent in NH) – 436 Amherst Street, Nashua, NH 03063 cell: (603) 661-7301 email: slerette@masiello.com
Bob LeRette – Better Homes & Garden Real Estate / The Masiello Group (Licensed Agent in MA & NH) - 436 Amherst Street, Nashua, NH 03063 cell: 603-438-2550 email: ralerette@comcast.net