What is Loop?
Loop® biosolids is a natural soil builder. Using Loop recycles the nutrients in our food back to the land, the same way nature does. As it has for the past 40 years, King County makes Loop from the food and poop that we remove and clean in the wastewater treatment process. The result is Loop, an endlessly renewable resource that’s good for people, plants, and Puget Sound.
learn about loop
What do you see about this tree ring? Do you know what made this grow faster? Your high school biology class may not have covered the surprising role our poop plays in growing healthy trees. Former Executive Director of Northwest Biosolids, Maile Lono-Batura, laughs about how a guest lecture in her biology class inspired a lifetime of learning and a career she never expected.
gardens & landscapes
Enrich any landscape or garden by using compost made with biosolids. This local and endlessly renewable soil amendment is made from recycled products and works as well as or better than commercial fertilizer. Unfortunately, GroCo compost won’t be available for retail sale anymore, but for now we can recommend other biosolids products such as the City of Tacoma’s TAGRO soil blends.
