BCR Environmental

What are Biosolids?

Biosolids are defined as sewage sludge that has been treated to meet the regulatory requirements for land application set out in the Code of Federal Regulations, Title 40 (Part 503). The U.S. Environmental Protection Agency (EPA) established the Part 503 rule and is responsible for overseeing the national biosolids program. Biosolids are the nutrient-rich organic product of wastewater treatment. A beneficial resource, biosolids contain essential plant nutrient and organic matter and are recycled as a fertilizer and soil amendment.