My remaining kits expired 3/30/2012. So, Until I do a bulk order, I went to my local HD to pick up a few kits of D-lead test kits. Luckily, i checked the expiration dates. They expired 3/18/2012. I had the lady call another HD and they had one current kit. I will have to hunt out more kits, but I can at least test my monday job and be current. Moral (besides not waiting) is check those expiration dates so you do not get an unneeded fine.