I have a question. Can I use the new treated lumber to build my raised beds?
Raised Bed Construction
Certified GKH Gardening Expert
The pressure treated wood sold in today's stores are required to be non-toxic, so are therefore considered safe for gardening. But some people still feel unsure about them. If this is the case for you, you can also look at building out of cedar. While it is more expensive, it will last longer.
The following article should be of some help to you: https://www.gardeningknowhow.com/edible/vegetables/vgen/raised-vegetable-gardens.htm