Treated Wood Illegal in Garbage, Recycling & Drains Hazardous Waste Treated wood is NOT accepted at the Napa-Vallejo Household Hazardous Waste Collection Facility. Instead, take treated wood waste to one of the following facilities: Clover Flat Landfill4380 Silverado Trail, Calistoga | (707) 963-7988 Potrero Hills Landfill3675 Potrero Hills Lane, Suisun City | (707) 432-4627 Hay Road Landfill6426 Hay Road, Vacaville | (707) 678-4718 Altamont Landfill10840 Altamont Pass Road, Livermore | (925) 455-7300 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.