A news station in Madison, Wisconsin, WKNOW, recently reported on tests that showed an increase in PFAS chemicals in the local water in two nearby counties. PFAS, also known as "forever chemicals" are manmade chemicals that don’t break down and can have adverse health effects on people and animals. If not removed, they can seep into the cropland and water supply contaminating food and drink. The EPA is continues to tighten regulations on the removal of PFAS from sewage sludge, but there is still a long way to go. The use of a multiple hearth furnace can be an effective way to remove PFAS from sewage sludge.
According to the story, "New test results from Public Health Madison and Dane County conclude more PFAS contamination has been identified. The organization has conducted private well testing, and 15% of tests came back with PFAS levels above Wisconsin's standard of 70 parts per trillion."