Skip to main content
King County logo

loop logo with pine cone

The King County Biosolids Program oversees the production and distribution of Loop®, its brand name for the nutrient-rich organic product created during the County’s wastewater treatment process. Loop is a natural soil builder and endlessly renewable resource that returns carbon and nutrients to the land. Loop enhances soil biology and helps it hold water. Simply put, it is good stuff that builds good soil.

Stay in the Loop

Sign up here for Loop news and updates

For more information about Loop biosolids, please contact us at: