Chemical companies are dodging a federal law designed to track how many PFAS "forever chemicals" their plants are discharging into the environment by exploiting a loophole created in the Trump administration's final months, a new analysis of federal records has found. The Fiscal Year 2020 National Defense Authorization Act put in place requirements that companies discharging over 100lb annually of the dangerous chemicals report the releases to the Environmental Protection Agency (EPA). But during the implementation process, Trump's EPA created an unusual loophole that at least five chemical companies have exploited. PFAS ... accumulate in humans and the environment. A growing body of evidence links them to serious health problems like cancer, birth defects, liver disease and autoimmune disorders. The Trump EPA gave PFAS an unusual exemption under the law that allows companies not to report discharges if the amounts are ... less than 1% of a total mixture. Companies discharging thousands of pounds of PFAS could have gotten their releases under the 1% threshold via several routes. Companies may have added water to PFAS to dilute it to the point that it is below 1%. However, the total amount of PFAS released is still high, and may present a threat once in the environment. Companies may also be using complex mixtures with multiple PFAS. If the companies keep any one PFAS compound below the 1% threshold, then they won't have to report it.