PFAS detected in 95% of landfill leachate at levels 10,000x drinking water limits

Landfill operators, municipal water utilities, and residents near landfills face an intractable contamination problem: PFAS 'forever chemicals' are present in 95% of landfill leachate tested across 200 U.S. landfills, with concentrations reaching tens of thousands of parts per trillion -- dramatically higher than the EPA's 4 ppt drinking water standard for six PFAS compounds. This leachate is generated continuously as rainwater percolates through buried waste containing everyday PFAS-laden products (food packaging, textiles, cosmetics), and most wastewater treatment plants that receive this leachate cannot remove PFAS, so they pass it through to rivers and drinking water supplies. In Minnesota, officials found PFAS in 100 closed landfills, with 16 sites at 10x above state drinking water standards. In New Hampshire, 77.5% of sampled landfills had PFAS in groundwater above state standards. The problem persists structurally because PFAS do not break down in landfill environments, existing liner systems were never designed to block PFAS molecules, there is no commercially viable technology to destroy PFAS in leachate at scale, and an estimated 1,760 pounds of PFAS escape annually through leachate alone. Studies indicate PFAS will continue leaching from existing landfills for at least 40 more years.