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 identifying TWW, handling, storage, labeling, transportation, notifications, recordkeeping, reuse and TWW prohibitions.

For complete information on the TWW disposal, review the following: