UPDATE: Ecology's new website will be live on Monday morning! Our official web address will be https://ecology.wa.gov

Water Quality photo identifier

Water Quality Program

photo of Ecology employee working with dairy farm workers

Concentrated Animal Feeding Operation General Permit

About the permit

The Concentrated Animal Feeding Operation (CAFO) permit requires large-scale livestock operations in Washington to implement specific practices to better protect groundwater, rivers, lakes and marine waters from manure pollution. It builds on the Department of Agriculture’s (WSDA) Dairy Nutrient Management Program. WSDA will continue as the principal inspector of dairies and will partner with Ecology to implement the permit.

Updating the permit

On January 18, 2017, we issued an updated water quality permit. The permit changes were based on substantial stakeholder and public feedback. Learn more >


small photo of kinsman cowsGet documents for the new permit and the expired permit



small photo of public involvement workshopPara información en español



small photo of building full of chickensLearn about our historical CAFO permit development work



small closeup image of keyboardGet answers to frequently asked questions about the CAFO permit and CAFOs

Contact us

Sign up for email updates on the CAFO permit listserv