Underreported PFAS Levels in US Drinking Water Raise Health Concerns

• •New study reveals U.S. PFAS levels in drinking water may be underestimated by 50%.
• •98% of PFAS test results were below EPA's minimum reporting levels, indicating data gaps.
• •176 million Americans may be affected by PFAS-contaminated drinking water.

A study published in Cell Reports Sustainability indicates that the U.S. may be underestimating PFAS levels in drinking water by about 50%. The Environmental Protection Agency (EPA) monitors these toxic chemicals, which have been linked to serious health issues, including cancers and hormonal disruptions. The study's analysis revealed that 98% of PFAS test results from January 2026 were below the EPA's minimum reporting levels, leading to significant data gaps. Researchers suggest that these below-limit results should not be treated as zero, as they still indicate the presence of PFAS. The findings highlight the need for improved reporting methods to accurately reflect PFAS concentrations in water systems, affecting approximately 176 million Americans who may be consuming contaminated water. However, the study does not determine whether any specific water is unsafe.