According to the San Francisco Public Utilities Commission, biosolid compost comprises around 20 tons of the 82,000 tons of solid material removed from the city's sewer every year. The sludge goes to a composting facility where it is mixed with green waste and composted (heated to 130 degrees for 30 days.)
The San Francisco Chronical is reporting that a debate is going on over the safety of this biosolid compost.
You can read the full article here.
Aguinaga Green does NOT use any biosolids in our products. All of our products are derived from tree trimmings and bush trimmings from local tree trimmers.