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Wastewater Residuals

Residuals are the organic residues removed from wastewater during the treatment process.

These nutrient-rich, solid, semi-solid, or liquid residuals may be incinerated, landfilled, or beneficially reused as fertilizer or compost.

Residuals that meet the criteria to be reused are often called biosolids. Biosolids may not be the prettiest material, but they are a sustainable way to provide nutrients to crops.

Since 1993, NEIWPCC’s Residuals Workgroup has improved interstate communication on issues associated with residuals from wastewater treatment and on-site sewage disposal. Prior to March 2020, the workgroup met 3 or 4 times a year. Our workgroup now meets monthly. The group comprises staff from NEIWPCC and the EPA, and the residuals coordinators from each of our member states’ along with New Jersey, Michigan, and Minnesota environmental agencies.

The Residuals Workgroup promotes compatibility among state and federal sludge and septage management programs. NEIWPCC provides a forum for interstate discussion as well as technical assistance and coordination. Topics of discussion include per- and polyfluoroalkyl substances, sludge technologies, and short-term and long-term stressors impacting the northeast sewage sludge management system’s available capacity.

Meeting Materials: September 26, 2019