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loop logo with pine cone

The King County Biosolids Program manages the distribution and use of Loop®, our name for the nutrient-rich organic biosolids product created by recycling the poop in the County’s wastewater. Loop is a natural soil builder and endlessly renewable resource that returns carbon and nutrients to the land. Simply put, it is good stuff that builds good soil.

While Loop is only available to commercial farmers and foresters, other local biosolids products are available for gardens and landscapes.

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