Subsurface Radon Source Concerns

How Radon Enters a HouseRadon is a colorless, odorless and tasteless radioactive gas produced by the decay of uranium and radium. The primary source of radon gas within a building and/or structure is from the release of the radioactive gas from underground naturally occurring minerals and rocks that contain uranium and radium deposits. 

Once released, the radon gas can migrate vertically up through the soils and enter buildings and structures through cracks and openings in the foundation.

As outlined in the section below, radon gas can also be transported into the home with the drinking water pumped from the same or different formations that the supply well is producing from.

It is important to perform radon testing on your property. The average indoor radon level throughout the U.S. is estimated to be about 1.3 pCi/L (picoCurie per liter of air), and about 0.4 pCi/L of radon is normally found in the outside air.

Radon Mitigation

The EPA recommends fixing issues with radon gas in homes or facilities if the results of one long-term test or the average of two short-term tests show radon levels of 4 pCi/L or higher. The EPA further notes that you may also want to consider fixing the home if the level is between 2 and 4 pCi/L.  With today's technology, radon levels in most homes and facilities can be reduced to 2 pCi/L or below.


Radon-Mitigation.jpg Radon In Drinking Water

Homes that utilize wells for drinking and domestic water needs (washing and bathing) commonly have higher indoor radon levels within the home.

Radon gas present in the subsurface under the home can be transported up with the pumped groundwater and, if not properly treated, can be released into the home as a result of running the taps and using the water for washing and bathing.  Levels exceeding 40 pCi/L have been measured in residential homes with high groundwater derived radon levels.

A properly designed and maintained water treatment system should be able to remove the radon gas prior to entry to the home.

It is especially important that homeowners on private wells have their homes tested for radon.  If elevated levels are identified (greater than 2.0 pCi/l) then specialized testing of the well water should be conducted (see Well Water Section). 

Additionally, it should be noted that the water should be retested any time that the water treatment system is changed or modified to ensure that the water entering the home is safe.


If you think there is a possibility of Radon Gas in your home or water supply contact EnviroHome at 888-810-2228.