Welcome to the site of the Wood Preservative Science Council. On this site you will find sound, scientific information on the wood preservative chromated copper arsenate (CCA) and the suitability of CCA-treated lumber, plywood, poles, piling, and timbers for a range of common applications. The data support that CCA-treated wood is safe when used as recommended.

To read the CCA Consumer Safety Information Sheet, click here, visit the Inorganic Arsenical Pressure-Treated Wood Consumer Safety Information Web Site.