Biosolids are the nutrient-rich organic byproducts resulting from wastewater treatment. Biosolids have been treated and tested and meet strict federal and state standards for use as fertilizers and soil amendments. Biosolids provide plant nutrients and organic matter to soils.

COMPOST GENERATED FROM RECYCLING BIOSOLIDS IS COMMONLY USED ON GOLF COURSES.

Where Do Biosolids Come From?
Biosolids are created through the transformation of liquid and solid matter in wastewater using natural processes. This transformation involves physical, chemical, biological, and heat processes designed to remove water and reduce the levels of odor and bacteria in the final biosolids product.

For more on wastewater treatment, see www.epa.gov/owm/ or www.wef.org.

Q:
A:

Are Biosolids Safe?
Several decades of concentrated research and experience indicate that biosolids that are properly treated and managed in accordance with federal and state or provincial regulations provide notable benefits to soils, crops, and the environment while posing negligible risks to public health and the environment. ÊFor a more detailed discussion of scientific assessments of biosolids recycling, see the science of biosolids recycling.

Q:
A:

Why Are Biosolids Recycled?
Biosolids recycling returns useful resources to the land. Biosolids are rich in nutrients like nitrogen and phosphorus and organic matter that improve the growth of farm crops, gardens, forests, golf courses and parks. Biosolids can also help reclaim open mines and gravel pits.

Q:
A:

What Are Residuals?
Residuals are organic "waste" products that can be put to beneficial uses. Biosolids are one kind of residual. Other wastewater residuals commonly recycled in New England include those generated at pulp and paper mills. See Pulp and Paper Mill Residuals.