Sewage sludge that was spread over 300 farm fields in South Carolina between 1993 and 2013 was found to contain an unsafe amount of PFAS in some cases, hundreds of thousands of times over the EPA standards. PFAS, also known as forever chemicals, can cause serious health problems in humans and animals, including cancer. This is prompting calls for a federal cleanup by South Carolina officials. Read more about this here.
PFAS can be removed from sewage sludge by way of multiple hearth furnaces that can remove the PFAS thorugh high temperatures.