2021 Update: Treated Wood Is Hazardous Waste
Treated Wood Waste (TWW) comes from wood treated with chemical preservatives, often identified by green or dark brown coloring and staple marks. TWW may be used in decking, fence posts, landscape timbers and guardrails to name a few.
The alternative management standard (AMS), which allows waste haulers to accept treated wood waste (TWW) from residential and commercial customers, expired on December 31, 2020.
For this reason, beginning on January 1, 2021, waste haulers in the County of Marin cannot accept TWW at their facilities, in their debris boxes, and in the garbage, recycling, or composting bins as treated wood is now considered hazardous waste.