US Environmental Protection Agency: Biosolids Web Site

Water Environment Federation's: After the Flush http://www.biosolids.org

NUS Composting Council. http://www.compostingcouncil.org/

Pennsylvania: PA DEP's Biosolids Home Page

New Jersey: New Jersey DEP Biosolids Page

Virginia: Virginia Biosolids Council 

New York State:  NYS DEC: Recycling Biosolids from Wastewater Treatment Facilities

Maryland:  MDE: Resource Management Program, Sewage Sludge Utilization

Delaware:  DNREC: Land Treatment of Waste (Biosolids and Residuals)

Northwest Biosolids: What are Biosolids?: http://www.nwbiosolids.org/what-are-biosolids/faqs

North East Biosolids and Residuals Association: https://www.nebiosolids.org/resources/

USDA-ARS: Twenty Years of Experience Says Sewage Sludge Beneficial http://www.ars.usda.gov/is/pr/1998/980518.htm

Use of Reclaimed Water and Sludge in Food Crop Production
https://www.nap.edu/catalog/5175/use-of-reclaimed-water-and-sludge-in-food-crop-production

Hazen and Sawyer: www.hazenandsawyer.com

Material Matters, Inc.: www.materialmatters.com

CDM Smith: www.cdmsmith.com

Garvey Resources: www.GarveyResources.com

Jacobs: www.jacobs.com

AECOM: www.aecom.com

GHD, Inc.: http://www.ghd.com/usa/

Synagro: www.synagro.com

Denali Water Solutions: www.denaliwater.com

JP Mascaro & Sons: www.jpmascaro.com/our-facilities/a-and-m-compost.aspx

Lang Enviroventures: www.enviroventures.com/

Casella Organics: www.casellaorganics.com

Liberty Processing & Soils, LLC: https://www.blackwoodblends.com/

DC Water: https://www.dcwater.com/biosolids

Carlisle, PA: https://www.carlislepa.org/departments/treatment-plants-division/biosolids-division/

Alexandria Renew Enterprises: https://alexrenew.com/transforming-water/resource-recovery

Maryland Environmental Services: https://menv.com/service/biosolids-management/

Sierra Club: Sludge in the Garden:  https://www.sierraclub.org/toxics/pfas/pfas-sludge

Cornell Waste Management Institute - Center for the Environment:  http://cwmi.css.cornell.edu/sewagesludge.htm

United Sludge Free Alliance:  https://usludgefree.org/

PENNSYLVANIA: Sewage Sludge Issues  http://members.tripod.com/~PA_Sludge/