We regulate how biosolids are treated, tested, and used within Washington. Wastewater treatment plants producing biosolids and the businesses that apply them for farmers are regulated by Ecology.
Contact information
Kyle Dorsey
State Biosolids Program Coordinator
kyle.dorsey@ecy.wa.gov
360-407-6559
Statewide policy and technical issues
Out-of-state, federal and other agency inquiries
Betty Ann Bickner
Regional Biosolids Program Coordinator
bettyann.bickner@ecy.wa.gov
509-329-3505
Biosolids and Septage permits and related issues
Eastern Region counties: Adams, Grant, Ferry, Lincoln, Pend Oreille, Spokane, Stevens, and Whitman.
Terri Costello
Regional Biosolids Program Coordinator
terri.costello@ecy.wa.gov
509-329-3579
Biosolids and Septage permits and related issues:
Eastern Region counties: Asotin, Columbia, Garfield, Franklin, and Walla Walla.
Septage permits and related issues:
Central Region Counties: Chelan, Douglas, and Okanogan.
Canming Xiao
Regional Biosolids Program Coordinator
canming.xiao@ecy.wa.gov
509-575-2842
Septage permits and related issues:
Central Region counties: Benton, Kittitas, Klickitat Yakima counties
Peter Severtson
Regional Biosolids Program Coordinator
peter.severtson@ecy.wa.gov
509-397-4737
Biosolids permits and related issues:
All biosolids (non-septage) permits and related issues in the Central Region.
Amber Corfman
Regional Biosolids Program Coordinator
amber.corfman@ecy.wa.gov
360-255-4406
Biosolids permits and related issues:
All biosolids and septage permits and related issues in the Northwest Region
Kelsey Dunne
Regional Biosolids Program Coordinator
kelsey.dunne@ecy.wa.gov
360-407-6055
Biosolids permits and related issues:
All biosolids and septage permits and related issues in the Southwest Region