Everybody is different. I have a cousin who lived here for a while. He got sick over and over and over while I ate at the same places and same food and was never ill. He had cancer and was fighting it and this place turned out not to be so good for him. Me I got sick a couple of times when I moved here and nothing since. I agree about most people getting use to it BUT I will point out as Mainecoon did that the water pressure up north is pretty constant so nothing can get INTO the pipes. In Mexico when the pressure is zero and it is sometimes, ground water can leak back into the pipe so that's why I use filters and UV light always on my water. Remember also we still have many working septic systems on houses not hooked up to the sewer. OK maybe I am paranoid I can accept that but I think my facts are pretty strong arguments for filters and UV lights.