So I guess snorting water straight outa the tap is a no-no?
That's pretty much correct. Unless you are totally OK with your brain getting eaten by an amoeba.
Boil it properly or use distilled from the pharmacy. Distilled is best because if you use the salt packets you get the right mix. Tap water can contain enough minerals to throw that balance off.
Of course, having not quite the right amount of salts in the water isn't nearly as bad as giving amoeba's a very short path to your gray matter. Yum yum.
Best,
E