You can walk into a store in Colorado and legally buy marijuana, but you might get fired if you smoke it.
A new Colorado state law went into effect January 1, permitting anyone 21 years of age or older to buy and consume limited amounts of marijuana in the state, despite the fact that marijuana is a controlled substance on the federal level.
But the Colorado law states that businesses can still prohibit marijuana use. And courts have ruled that employees can be terminated for smoking pot on the job — and even in private, on personal time.
If a company has a drug policy in place, and an employee fails a drug test, employers can take whatever action they deem to be prudent.