>>1661049Most drinking water filters will remove microbes, but not chemicals. Thus, pesticides will be the biggest problem from farm run off. A water distillery made for use over a campfire or camp stove will be the best way to clean drinking water. There are many types, some are really expensive, but they are also very easy to make yourself. I must warn you, pay the extra money for a stainless steel coil of tubing instead of using copper. The copper tubing will make the water taste fucking horrible.