This should be your go-to cheat sheet for maintaining a safe water source. Lifted straight from the Center for Disease Control and Prevention, this thorough chart lays down the law in regards to healthy drinking water treatment methods for backcountry and travel use. Don’t be confused by the plethora of semi-accurate information available online, this is the where the buck stops. If you’re like me and have a fuzzy memory, you should print this off, fold it up and take it with you if you’re going to be traveling. Alternatively, save it as a pdf and keep it on your phone. This is important stuff folks. Knowing how to maintain a healthy water supply is imperative to survival, and if you’re out there adventuring you want to be making intelligent, informed decisions. I tried to post the best quality image I could get from the pdf below, but if you’re having issues reading it just go here and view/download the original.