The acceptable level of radon in New Hampshire depends on wether it is in water or air. The current recommendation in New Hampshire is to consider reducing radon in water when the level is between 2,000 -10,000 pCi/L and the airborne radon level in the home is 4pCi/L or more. The average level of indoor radon in the U.S. is 1.25 picocuries per liter (pCi/L, but in New Hampshire, it is estimated to be 1,8pCi/L
Unit owners should seek Board approval before installing any remedial system. Our buildings have a mitigation pipe inside our wall. It is located in the rear attic and runs to the basement foundation wall. No external pipe is needed except thru the roof.
Attached photos show an installed radon mitigation system.
Radon Radon Responsibilities Responsibilities Reference guide Reference guide Septic System Septic System Alternative Energy Alternative Energy