REMOVAL OF RADON FROM WATER
The removal of radon from water is limited to two practical options. One technique uses activated carbon to adsorb the radon gases from the water. The radon gas then finishes decaying in the carbon. Activated carbon should only be used if the radon concentration in the water is below 5000 pCi/L. This low level is recommend by the EPA in their “Consumer’s Guide to Radon Reduction” because of the concern over the accumulation of radioactivity in the carbon.
Aeration is used for treating water with radon levels above 5000 pCi/L. The radon is released from the water by bubbling air through the water. The radon is then vented to the outdoors. There is no buildup of radioactive materials when this technique is used. Aeration units do require the repressurization of the water after it is treated and care must be taken to properly vent the radon gas. This venting is done above the roof line just like an air radon system. An auxiliary fan outside of the living space provides for safe removal of the radon gas