I was at a party where other people were smoking pot but I was not. Will passive smoke make you test positive?
The lab cut off numbers are set at a level of concentration high enough to ensure that passive smoke
will not cause a positive result. Yes, she may have some level of the drug in her system, but for
someone to test positive from passive smoke, they would have to be locked in a room the size of a
phone booth with 5-6 people smoking marijuana for 4 hours continuously. Passive inhalation will not
make you test positive.