Question: are biosolids considered hazardous waste?
Answer: Sewage sludge is a hazardous waste. ... After treatment for pathogens, biosolids may still contain many different hazardous substances, including antibiotics and pharmaceuticalsi, mercuryii, endocrine disrupting compounds like phthalates and bisphenol Aiii, brominated flame retardantsiv, and nanoparticlesv.