Is CCA still used to treat wood?

If your residential wood structure was built before 2004 and is not made of cedar or redwood, it was most likely constructed with wood pressure-treated with Chromated Copper Arsenate (CCA). CCA is a chemical preservative comprised of arsenic, chromium, and copper. read more

Chromated copper arsenate (CCA) is a wood preservative that has been used for timber treatment since the mid-1930s. It is a mix of chromium, copper and arsenic (as Copper(II) arsenate) formulated as oxides or salts, and is recognizable for the greenish tint it imparts to timber. read more

Wood treated with CCA can be still be used for commercial, industrial and some agricultural purposes. If you have questions about CCA, or any pesticide-related topic, please call NPIC at 1-800-858-7378 (8:00am - 12:00pm PST), or email us at npic@ace.orst.edu. read more

CCA-treated wood is used in marine facilities (pilings and structures), utility poles and cross arms, pilings for terrestrial and freshwater uses, commercial and agricultural construction (primarily foundations), and highway structures (such as bridge components, guardrails, and posts). read more