Loop® biosolids
Turn your dirt around
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.
Here in King County, we send a small amount of Loop to a commercial compost facility that makes GroCo compost for local gardeners and landscapers.
Loop
Compost made with Loop
A rich history of use
Fighting climate change
Research
Quality and safetyFollow us
Stay in the Loop
Sign up here for Loop news and updates
For more information about Loop biosolids, please contact us at:
- loop@kingcounty.gov
- 201 S. Jackson Street, KSC-NR-0512, Seattle, WA 98104
- 206-477-5557