What does the science say about the disposal of CCA-treated wood?
The current science does not indicate any adverse effects on the environment when CCA-treated wood is disposed of properly, in accordance with state and federal regulations. A 2005 analysis by Red Oak Consulting of the data and research concerning the disposal of CCA-treated wood in unlined Florida construction and demolition (C&D) landfills concluded: “There is no evidence that the disposal of CCA-treated wood in unlined landfills is contributing to arsenic levels in groundwater.” The State of California disposes of treated wood wastes in lined, non-hazardous landfills. Studies performed for the Western Wood Preservers Institute in March 2004 found that no additional regulatory action was warranted because: “The arsenic levels in leachate from landfills accepting treated wood were virtually identical to levels at landfills that do not. The concentrations of arsenic which might result from treated wood products were either below the drinking water standard or below the Limit Threshold
