Arsenic-Treated Lumber in Raised Beds: Risks, Alternatives, and Simple Fixes

CCA (arsenic) lumber is being phased out. Studies show arsenic can accumulate in veggies but not at harmful levels. Still, why risk it?

Options

• Line bed interior with sheet plastic or aluminum.
• Use new ACQ/copper azole/borate lumber (less problematic).
• Use "plastic" lumber (Trex, Fiberon)—drive rebar every 36" to hold shape.
• Use untreated 2x6/2x8—lasts ~3 years, easy to replace.

No reason to use treated wood if you don't want to.