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MAP: Where water systems reported PFAS contamination. This map shows water systems included in the EPA’s PFAS testing records, as of July 11, 2024. It’s based on boundaries developed by ...
Also, 95 public water systems with PFAS levels between the federal standard's 4 parts per trillion and the state's standard of 20 parts per trillion will need to address PFAS for the first time.
This US Geological Survey map shows the number of PFAS detected in tap water samples from select sites across the nation. The findings are based on a USGS study of samples taken between 2016 and ...
It includes a recommendation that the State of Michigan set advisory limits for PFAS other than PFOA and PFOS, and for the state to develop new drinking water standards "based on weight of evidence and convergence of toxicological and epidemiological data", suggesting that the current national advisory level of 70 ppt for PFOA + PFOS may be too ...
During this process, oxidizing substances are added to PFAS-contaminated water and then the liquid is heated above its critical temperature of 374 degrees Celsius at a pressure of more than 220 bars. The water becomes supercritical, and, in this state, water-repellent substances such as PFASs dissolve much more readily. [227]
Other states that have issued PFAS standards include Michigan, New York and Vermont. [79] Between 2016 and 2021 the U.S. Geological Survey (USGS) tested tap water from 716 locations across the United States, finding PFAS levels exceeding the EPA advisories in approximately 75% of samples from urban areas and in approximately 25% of rural areas ...