Nobody can realistically and accurately answer that question for you. Each persons body is different and there are too many variables to take into consideration. Only periodic testing with a THC test kit (using the first urination of the day for each time) can give you that answer.

Drinking water is only helpful on the day of the U/A. Drinking water in the days or weeks before the U/A is of no help. To find out why, read post #3 of this thread:
http://boards.cannabis.com/drug-test...ml#post2225714