Uranium detectable in two-thirds of US community water system monitoring records ColumbiaMSPH
across the U.S, and identify sociodemographic subgroups served by these systems that either reported high metal concentration estimates or were more likely to report averages exceeding the US EPA's maximum contaminant level ."
Approximately 90 percent of U.S. residents rely on public drinking water systems, with most residents relying specifically on community water systems that serve the same population year-round. The researchers evaluated six-year EPA review records for antimony, arsenic, barium, beryllium, cadmium, chromium, mercury, selenium, thallium, and uranium to determine if average concentrations exceeded the maximum contaminant levels set by the EPA which regulates levels for six classes of contaminants.
According to findings 2·1 percent of community water systems reported average uranium concentrations from 2000 to 2011 in exceedance of the EPA maximum contamination levels, and uranium was frequently detected during compliance monitoring .
Nigra and her colleagues note that the consistent association between elevated CWS metal concentrations and semi-urban, Hispanic communities implies that concentration disparities are a failure of regulatory policy or treatment rather than underlying geology. Hispanic/Latino populations show numerous health disparities including increased mortality due to diabetes, as well as liver, kidney, and cardiovascular disease.
"Additional regulatory policies, compliance enforcement, and improved infrastructure are therefore necessary to reduce disparities in CWS metal concentrations and protect communities served by public water systems with elevated
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