We are contemplating pumping stream water into a 55 gallon barrel, to run through a propane tankless water heater for showering. The water is clear but the stream runs through a cow farm so no telling what it could hold. It will be used for strictly showering. Most everything i look up calls for boiling, but is more related to drinking water. I’m sure a couple caps of bleach would be fine, but not interested in the smell it leaves behind. Anybody done anything like this in your off grid places. UV light, tablets, etc…? It might be fine as is if we don’t invest or have cuts on us, but i would feel better if there is a practical way to treat.