Abstract
By combining information about the occurrence, transport, exposure, and health effects of radon in drinking water, it has been estimated that over a period of 70 years (the average lifetime in the United States), between 2000 and 40 000 lung cancer fatalities are caused by inhalation of natural radon released from US public water supplies. The average concentration of radon in these water supplies generates a lifetime risk of about 1 in 10 000, the highest level of risk allowed for any contaminant currently regulated under the Safe Drinking Water Act. Reducing the levels of radon in drinking water, which would significantly lessen the risks to health, has been found to be feasible by either aeration or treatment with granular activated carbon.
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