I have a bunch of stored water that I'm interested in testing for bacteria and stuff. Any idea how to do that? Of course I should replace it, but before doing that I'd like to find out how bad it's gotten, just in case I get in a situation where I have to actually use water that old (about 5 years in 1 gallon plastic bottles). I actually tasted some that was about 2 years old and it tasted fine, but I wasn't willing to try drinking any quantity of it. I think I posted something about this last year or so too.