Nearly one in every eight community water systems in Illinois were found to have PFAS detections in drinking water. The Illinois Environmental Protection Agency (EPA) recently announced the completion of an 18-month statewide sample collection study of PFAS in drinking water. The study collected drinking water from over 1,000 community water systems (CWS). According to the Illinois EPA, 126 of the 1,107 CWSs sampled had confirmed PFAS detections.