The study found that 27% of nearly 5,000 public water systems had detectable levels of at least one unregulated contaminant, exposing about 97 million people.
1,4-dioxane emerged as the most pervasive contaminant, showing up in 22% of public water systems, highlighting a significant issue in drinking water safety.
Communities of color, particularly Hispanic and Black populations, are disproportionately affected, as evidenced by the prevalence of contaminants in areas with higher proportions of these groups.
The research underscores the urgent need for regulatory measures as millions remain exposed to unregulated industrial chemicals in their drinking water.
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