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Dislodgeable Residues and Coatings for CCA Treated Wood

Residues that contain arsenic, chromiumand copper can transfer to skin or clothing when people come into contact with CCA-treated wood. This type of wood may be found in play equipment, decks or picnic tables. In these settings, there is increased opportunity for exposure to arsenic, particularly through hand-to-mouth contact. CCA-treated wood continually accumulates dislodgeable residues on the wood surface as it is weathered by the sun, wind and water. While CCA-treated wood is no longer used in most residential construction projects, many structures built before 2003 can still be found in residential areas. Coating existing structures with paint or other types of wood sealants can reduce the amount of residue leaching into the environment and transferring to skin or clothing during contact. These coatings may need to be reapplied on a regular basis to minimize the risk of contact with CCA residues.

If you have questions about this, or any pesticide-related topic, please call NPIC at 800-858-7378 (8:00am - 12:00pm PST), or email us at npic@ace.orst.edu.

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Last updated December 03, 2019

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