When PFAS concentrations in drinking water fall below laboratory reporting limits, they are sometimes treated as “zero” in statistical analyses. But a new study published in Cell Reports Sustainability, which reanalyzed federal monitoring data, found that estimated PFAS concentrations in U.S. drinking water could be more than twice as high as calculations that treat results below laboratory reporting limits as zero suggest. … By using statistical models to estimate concentrations below laboratory reporting limits, the researchers found that more sampling locations could reach or exceed the study’s comparison threshold of 4.05 parts per trillion, just above the EPA’s drinking water limit of 4 parts per trillion.

Other PFAS news:

• KJZZ (Phoenix): This new study details technology that can break down ‘forever chemicals’ in water
• Livermore Vine (Calif.): Livermore water stations to receive upgrades to PFAS treatment systems