I was around some friends that were smoking marijuana las week, and i had a piss test today for the military? will it show up? i am very active and drink plenty of water.

There : There would have to be an awful lot of marijuana without proper ventilation for you to show a positive on a urine drug screen. However, if you are on active duty, you know that you shouldn't even be around people who are using dope. Don't put your health and your career at risk.

Activity and water: Don't really make any difference. Second-hand marijuana smoke does not give people who were exposed to tiny amounts a positive test. If you shared a fiat or a phone booth with 4 people all smoking pot for several hours with windows closed you might begin to approach having a positive test. Old sayings - if you don't want to eat, stay out of donut shops, if you don't want to drink stay out of bar.