• Early on in EGLE's PFAS investigation, four public water supplies were listed on the map of contaminated sites in Michigan. Since these public water supplies are a symptom of, rather than a source of, PFAS contamination, they have been relocated here. PFAS sites that are being investigated by EGLE are sites with a groundwater result over 70 ppt PFOS and PFOA and can be found at Michigan PFAS Sites.