Dude I'm a heavy smoker and on probation now. A month ago i got the notice that they were doing a physical, mental, and drug tests on me. I smoke Alot and only Chronic meaning KB. So I got the notice a week before it happened. Stopped smoking started drinking more than usual. Still hung out with friends while they were smoking. Passed. I heard from a recent study that marijuana more than likely only stays in your body on average for only a week.