im not sure if water works to pass a drug test. the first drug test i took i smoked the day befor and didnt do shit to try and pass it. the next drug test i took i drank 2 gallons of water the day of the test. and the last drug test i took i drank 3 gallons of water the day of the test. each drug test there was more and more thc in my body. from my first drug test to my last the thc level fucking tripled. i swear i took 5 drug test in my life and i never passed one of them. i fucking hate police for having to fuck with me and fuck up my life. my life would have been so much better if it wasnt for those fucking pigs.