If you live in the surburban area or a simple town like I do, there are a couple things it's do to prepare for emergency survival.
Reverse Osmosis water filtration systems do not live up to their promise. I found myself one among the first to deliver a UV water purifier a have a look at. https://git.the-kn.com/ingef657748477/gravity-water-filter4051/wiki/Why-Camping-%26-Boating-Enthusiasts-Need-A-Marine-Uv-Water-Purifier