Several U.S. Communities Exposed to Dangerous Levels of Arsenic in Their Drinking Water

by William Carter

A new national study of public water systems finds that arsenic levels are not uniform across the U.S., even after the implementation of the latest national regulatory standard. In the first study to assess differences in public drinking water arsenic exposures by geographic subgroups, Columbia University Mailman School of Public Health researchers uncover inequalities in drinking-water arsenic exposure across certain sociodemographic subgroups and over time.

Community water systems reliant on groundwater, serving smaller populations located in the Southwest, and Hispanic communities were more likely to continue exceeding the national maximum containment level, raising environmental justice concerns. Findings appear in the journal Environmental Health Perspectives.

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