Treated Wood Illegal in Garbage, Recycling & Drains Hazardous Waste Treated wood cannot go in any of your carts, and is NOT accepted at the Devlin Road Transfer Station. It must be disposed of at an authorized landfill – as of September 2021, a special variance is no longer required to haul and dispose of treated wood. California’s DTSC has a new treated wood fact sheet with info on proper storage and hauling procedures. Customers with large amounts of treated wood can contact us for special debris box and hauling service. Small amounts of treated wood (up to 3′ long) are accepted at the Napa-Vallejo Hazardous Waste Facility. Drop off is no charge for residential customers, but there is a limit of 50 lbs. The rate for commercial customers is $203/foot and the maximum per month is 220 lbs – appointments are required. Call (800) 984-9661 for more information and to schedule an appointment. Please see this Napa County TWW info sheet or the DTSC Treated Wood Waste page for more info and updates. Never Burn Treated Wood Chemicals such as creosote are used when treating wood, which creates toxic ash and emissions when burned. These particles lodge in soil and groundwater and take many years to break down, so never burn wood if you think it has been treated. Take Care With Sawdust Avoid breathing in sawdust from treated wood, and do not add it to compost or scatter on the ground. Ways to Reduce Choose a Different Wood Redwood and cedar are both naturally pest-resistant. Suppliers are also starting to offer more non-toxic treated wood options. Ways to Reuse Repurpose for New Project Certain types of wood products can be reused in a variety of ways. Find out how to repurpose your wood product.