Or S.I.W.R for short. Now please slap me harshly if I am mistaken, but I have just acquired this charming island and during my preliminary inspection after clearing out the previous tenants, and subsequently amassing a fairly large stockpile of mirelurk meat. Well, I've noticed something strange. I can build industrial water Purifier's around the entire bloody island?!?! Like, the whole way round? Two deep? My god, I could provide clean, safe drinking water for the entire wasteland, for a price, naturally.

Yes you can do that, if you have the resources.