Originally Posted by Mightysmurf
They must have gone down in price exponentially, then. Six years ago they were at least five figures.
No, I had a follicle test in 1999 for a retail food service store. They're not uncommon at all.
That said, to the OP. Don't overdo it on the water. If you drink too much, your test will come back a no test, and you'll have to retake. Depending on your employer, for some that is a red flag which then causes them to conduct a hair test. They do that, you're really effed.
I wouldn't worry about it at all. Even habitual users can get it out of their bloodstream in less than 2-3 weeks just by drinking a little bit more water and exercising a little bit more than they do right now.