What is chromated copper arsenate (CCA)-treated wood?
Chromated copper arsenate-treated wood is often referred to as pressure treated wood. CCA is a chemical wood preservative that protects wood from damage by insects, mould, sun and water. Chromium, copper and arsenic can leach out of CCA-treated wood. Small amounts of these chemicals have been measured on wood surfaces and in soil and ground cover near the wood. The risk of illness from exposure to chemicals leaching from CCA-treated wood is low. The following information has been prepared to assist those who wish to minimize their exposure to CCA-treated wood chemicals. What is CCA-treated wood used for? CCA-treated wood is commonly used for outdoor structures such as decks, fences, picnic tables and play structures. It is also used for landscaping. New pressure-treated wood has a greenish tint. Since the green tint fades with time, it may be hard to tell if an older wooden deck or play structure was made from CCA-treated wood. Check with the builder. Manufacturers are now labelling al
