California Disposal

Treated Wood Waste Disposal in California

The state of California requires that wood waste that has been preservative treated must be disposed per the regulations in the Alternative Management Standards (AMS) for Treated Wood. While the AMS has been in place for nearly three decades, it was reaffirmed by passage of AB 332 in 2021.

A new website,, has been created to provide comprehensive information for those disposing of TWW within California. The website feature information specific to those users disposing of TWW, from households to businesses and large quantity generators.

Specific sections include how to identify TWW, handling, storage, labeling, transportation, notifications, recordkeeping, reuse and TWW prohibitions. Each section offers guidance to meet the specific requirements for properly disposing TWW under California regulations. The website was developed in cooperation of the California Dept. of Toxic Substances Control (DTSC), the state agency which oversees and regulates the disposal of TWW.

The website is available in both English and Spanish. To translate the site into Spanish, click on the Languages flag icon at the top right corner of each page.

For complete information on the TWW disposal in the state of California, review the following: