title: The relationship between water-system size and 222Rn concentration in North Carolina public water supplies.
mesh_terms: D055593:Geological Phenomena; D005844:Geology; D006801:Humans; D009657:North Carolina; D011886:Radon / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D014881:Water Supply
chemical_list: D014873:Water Pollutants; D014875:Water Pollutants, Radioactive; D011886:Radon