There is a strange ratio in favor of Purified Water to Dirty Water, I've found.
I guess the way I figure, people got into the habit of boiling their water more.
Like some guy came into town, going "Guys, guys. Guys. Just keep an open mind....If we STERILIZE the water first, maybe it won't make us sick!"
Maybe there were a few dissenters, "Geoff, you're talking the crazy talk again. Have you been taking chems again?"
And a few were like "You know, maybe Geoff is on to something here...Howabout we boil it, and let it cool first, then drink it."
And you know there was that ONE guy... "Nah, Dirty Water is the way my daddy drank it, his daddy drank it, and maybe possibly his daddy's daddy drank it, I dunno. This boiling business ain't natural and is against our culture."
"Shut up, old man Jimmy..."
And Old Man Jimmy be all "You kids and yer adhesive and yer cookin' and yer hip hop! It's witchcraft and debauchery is what it is!"
But it was alright, because no one really listened to old man Jimmy anyway.