21 in CA as well as of March 2016 http://www.npr.org/sections/health-shots/2016/05/05/476872674/california-raises-age-of-tobacco-purchase-to-21-and-tightens-vap

21 in CA as well as of March 2016 http://www.npr.org/sections/health-shots/2016/05/05/476872674/california-raises-age-of-tobacco-purchase-to-21-and-tightens-vaping-rules http://www.npr.org/sections/health-shots/2016/05/05/47687267... I didn't notice until very recently when I saw a sign on a cash register (I don't smoke). Good for us. It's also very hard to smoke here, many places have lots of rules about where you can do it (not indoors, really far from doors, etc). I'm kind of surprised that people still bother. That said, when riding a bike around, it's very apparent that many people smoke weed in their cars now. You can smell it for about a block or two behind their vehicle.