Learn to be a Loop Ambassador using recycled biosolids

If you love gardening and meeting interesting people, King County Solid Waste has a volunteer opportunity for you.

We’re currently recruiting community members to join the first-ever class of Loop Ambassadors!

They are looking for people willing to learn and educate others about Loop®biosolids, the nutrient rich product of the wastewater treatment process, as well as soil fertility, nutrient recycling, carbon sequestration in soils, sustainable gardening, and more.

Volunteer Loop Ambassadors will receive training, a Loop t-shirt, and a free bag of GroCo compost made with Loop.

In exchange, Ambassadors will volunteer to staff public events and share what they have learned. The program is loosely modeled after the Master Gardeners program.


Interested? Email for more information.