True but take a look at your local water plant report, don't move to Flint, parts of Georgia, Pa where fracking has occurred, the reservation if you can find any water to filter not to mention the lower Colorado, upper Ohio rivers you should be just fine. I'd hold onto that pet rock you may enjoy looking at it when in the care facility someday when all that crap in the water takes out your internal organs possibly some day. Lots of places have really good sources of water till they don't. There are many great people that work to supply clean water but problems do occur and it doesn't hurt to be prepared as prevention is a lot cheaper and easier than recovery.