How to Remove Radon in Drinking Water

Radon can be removed from water with granular activated carbon according to research done by James E. Watson, Jr. and Douglas J. Crawford-Brown, Department of Environmental Services & Engineering at the University of North Carolina, Chapel Hill. Part of the research was financed by the US Department of the Interior, Geological Survey, through N.C. Water Resources Research Institute. Agreement No. 14-08-0001-GI 580, WRRl Project No. 70099, USGS Project No. 06 (FY89).

The paper outlines two methods for removing radon from drinking water: aeration and granular activated carbon (GAC). Aeration is expensive, and carbon has some limitations depending upon the amount of radon you're removing. Below is the link to the article in PDF format:

http://repository.lib.ncsu.edu/dr/bitstream/1840.4/1914/1/NC-WRRI-260.pdf