Friends of Toppenish Creek

Elevated Nitrate N and Phosphorus in Soils that Receive Dairy Manure in Washington State

May 10, 2023

As a result of a public records request the Friends of Toppenish Creek have received and analyzed a thousand documents from inspections of WA dairies by the WA State Dept. of Agriculture’s Dairy Nutrient Management Program (WSDA DNMP) from January 2020 to February 2023. Here is an overview of our findings regarding nutrients in dairy controlled cropland.

To Read More Click HERE


View a Power Point Review of Dairy Facts for Washington HERE.

King County produces millions of gallons of sewage sludge every year. Disposal of the sludge is a problem. One current answer is to spread the sludge in the Cascade forests.



To learn more about this issue please visit

 The Precautionary Group at &

The Northwest Toxic Communities Coalition at




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