Having left some water in a car in hot climate for some time (probably more than one but less than three weeks), I don't need studies to tell me that I don't wa

Having left some water in a car in hot climate for some time (probably more than one but less than three weeks), I don't need studies to tell me that I don't want to drink it. My tastebuds do a sufficiently good job. Probably still OK in an emergency though.