Biosolids (also referred to as treated sewage sludge) are the solids derived from primary, secondary, or advanced treatment of domestic wastewater.  All wastewater facilities operate under either a National Pollutant Discharge Elimination System (NPDES) or Water Pollution Control Facility (WPCF) permit.

Biosolid Analysis Package

Ammonia Fecal Coliforms Nitrite Total Solids
Arsenic Lead pH Total Volatile Solids
Cadmium Mercury Potassium Zinc
Chromium Molybdenum Selenium  
Conductivity Nickel Total Kjeldahl Nitrogen
Copper Nitrate Total Phosphorus


Also Available

Fecal Coliform



For more information and contacts regarding permits, please visit the Oregon DEQ Biosolids Program website at