meh.. doesn't matter to me, whatever's handy, all i care about is that it's clear (clean) and it's not old and stagnant (sp?) i don't actually intend on drinking the water, so i really don't care if it has a few more impurities that i'm not going to taste/feel/smell/hear/see... there's probably way worse stuff floating around in the air around you as you're reading this, then there is in tap water..