Pressure-Treated Wood and CCA | Best Pick Reports

Because pressure-treated wood resists rot and insect infestation, it is commonly used for fences. Historically, most wood was pressure treated with chromate copper arsenate (CCA), which has an arsenic component. The industry has voluntarily stopped using CCA for residential applications. The EPA suggests that existing CCA-treated structures should be properly maintained and sealed. More information on CCA is available from the EPA at or from the U.S. Consumer Product Safety Commission Consumer Hotline, 800-638-2772.