Biosolids Management

What are biosolids?
The wastewater treatment process separates solids and water, after which clean and disinfected water is discharged to a neighboring water body, while the solids are carefully processed to meet state and federal regulations. This further processing converts the solids into a useful, cost effective fertilizer, which contains a range of plant-essential nutrients.

Water Environment Services operates four wastewater treatment plants, three of which produce biosolids for land application. WES currently applies biosolids to fields in Clackamas and Sherman Counties.


Chanin Bays
Biosolids Supervisor
Kathryn Spencer
Environmental Program Coordinator
503-793-7147 cell
Bob Watson
Biosolids Application Technician 2
503-849-8823 cell