Introduction Sewage sludge (also known as ‘biosolids’) refers to the semi-solids left over from municipal waste water treatment. Current legal disposal options include incineration, landfill, and land application to agricultural land, rangeland, or forests. The resources on this page provide a scientific overview of health impacts from land application. Risk assessment is complex because Sludge … Continue reading Sewage Sludge (Biosolids) — land application, health risks, and regulatory failure