Pressure-Treated Wood: Organic and Natural Alternatives

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Synthetically treated lumber is not allowed under the National Organic Program (NOP) Regulations. Arsenic and lead, although natural materials, also are prohibited. Lumber is pressure treated to resist insects and fungi, but the materials used in the treatment are toxic to humans. This publication includes a discussion of currently used materials, lumber treatments using less-toxic materials, decay-resistant lumber species, and an explanation of the National Organic Program Regulation.

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Table of Contents

USDA National Organic Program Regulations
What Materials Are Used in Treating Lumber?
• Preservatives Applied Before Purchase
• Preservatives Applied After Purchase
Alternatives to Treated Lumber
Further Resources

Additional Information
Publication Type

Digital (PDF File), Hard Copy Mailed to You