1986年和1987年，对美国水务公司系统内井水中的氡含量进行了调查。据观察，最高水平的氡出现在美国东北部，与含铀花岗岩的形成有关。配水系统中储存的水中氡水平的下降主要是由于气体的挥发。无氡地表水与含氡地下水的混合产生了氡浓度随体积稀释而变化的水。人们发现，使用颗粒活性炭来降低氡水平是不切实际的，但观察到曝气既经济又高效。包括9个参考文献和表格。

In 1986 and 1987, a survey was conducted of the occurrence of radon in well water within the American Water Works Company system. It was observed that the highest levels of radon occurred in the northeastern part of the United States and were associated with formations of uranium-bearing granitic rocks. The decrease in radon levels in water stored within the distribution system was attributable primarily to volatilization of the gas. Blending of radon-free surface water with radon-laden groundwater resulted in a water with a radon concentration that is a function of volumetric dilution. The use of granular activated carbon to reduce radon levels was found to be impractical, but aeration was observed to be cost-effective as well as efficient. Includes 9 references, tables.