When did the wood treatment industry stop using CCA as a chemical?

The wood treatment industry ceased using chromated copper arsenate (CCA) as a wood preservative for residential use on December 31, 2003. CCA was widely used due to its effectiveness in preventing decay and insect damage; however, concerns about its safety, particularly regarding arsenic exposure, led to regulatory changes.

As a result of these health and environmental concerns, particularly regarding children's exposure to arsenic in treated wood, the U.S. Environmental Protection Agency (EPA) issued a ban on the use of CCA in residential settings, with the final date for existing uses being December 31, 2003. After this date, wood preserved with CCA was no longer permitted for use in decking, playground equipment, or other residential applications.

This decision reflects the industry's move toward safer and more environmentally friendly alternatives in wood treatment processes, addressing public health concerns while ensuring that wood products remain durable and effective.