Despite attitudes towards marijuana changing for the better all over the US, with 28 states have legalized it in some form or the other, drug testing policies at many workplaces remain draconian. These policies are stringent to the point that they can get you fired even if you’re just a casual weed user who enjoyed a smoke over the weekend!
Drug tests usually come with high stakes. After all, they’re usually administered by authority figures like the police, or by your employers. So they can actually make the difference between being gainfully employed and being out of a job! Given the near ubiquity of urine tests, there’s a good chance that this will be the form of test given to you at some point.