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Melissa, B.S. Biology/Psychology
Category: Health
Satisfied Customers: 1335
Experience:  B.S. Biology/Psychology - University of Georgia
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can you have a dirty UA from being around marijuana without ...

Customer Question

can you have a dirty UA from being around marijuana without smoking it, kind of like second hand smoke
Submitted: 10 years ago.
Category: Health
Expert:  Melissa replied 10 years ago.

Second hand marijuana smoke can leave traces of THC that can be detected in the urine for the next day or so. However, most drug tests have a "cut off level" that's high enough to NOT give a positive result for very low levels resulting from something like this. In order to get a positive result this way, you'd have to be exposed to very high levels of smoke for a very long duration of time in a very small space--thus, it's not likely.

I hope this helps!