Listed here are other websites providing biosolids and wastewater information:

• U. S. EPA

• U. S. EPA Office of Wastewater Management-Biosolids Site

• U. S. EPA Region IX

• California EPA

• National Biosolids Partnership

• Water Environment Federation Biosolids Site

• Northwest Biosolids Management Association

• New England Biosolids & Residual Association

• Rocky Mountain Water Environment Association