Some lumber companies can special order it. Home improvement stores might start to carry it if demand increases. Because it isn't yet widely available, it costs more. Ask for price quotes. Plastic decking or playground equipment is another option.
Some consumers also choose wood that is naturally pest-resistant, such as redwood or cypress.
Dos and don'ts Don't inhale sawdust from treated wood. Saw the wood outdoors. Wear a dust mask. Don't use treated wood for cutting boards or counter tops. Don't use treated wood to store food or animal feed.