Nearly 50% of U.S. tap water sources contain at least one PFAS, according to a recent U.S. Geological Survey (USGS) report in the August issue of Environment International. Perfluoroalkyl and polyfluoroalkyl substances (PFAS), commonly known as "forever chemicals," are synthetic compounds that contaminate products such as nonstick cookware and food packaging. The chemicals do not degrade in the environment and can remain in the body for years. Studies have found a correlation between PFAS ingestion and risk of cancer, hypertension, and developmental disorders. The USGS tested tap water from 2016 to 2021 in public systems and private wells across 716 locations in the United States. The samples were tested for 32 PFAS compounds; 45% tested positive for PFAS with many having between two and nine varieties present. The heaviest concentrations of PFAS were found in tap water in urban areas, especially along the East Coast, in the Great Plains and Great Lakes regions, and in Southern California. There are no nationally enforceable drinking water standards for PFAS contamination.