The trekking season is starting, need some help with few dillemas with more experienced hikers and outdoor enthusiasts.
Last year I got seriously ill for 2-7 days after drinking water from mountain source, which was supposed to be clean. This year I need some filtration or UV treatment, but I don't know how are your practical experiences to help me decide.
Scenario 1: Drinking water from mountain huts in central Europe. They use rain water or cisterns I don't know precisely. Should I use UV lamp of water filter on that water? Preferred method. Would that made it good enough to safely drink it or not?
The thing is they transport water with helicopters to some huts and it is almost as expensive as meal+overnight stay combined if you do hard hikes and drink a lot. And there is environmental issue from plastic bottles. I would like to avoid too much plastic bottles.
Scenario 2: Different flowing rivers in wilderness. There won't be any noticeable pollution or human presence above the water collection. Is UV or water filter enough? I guess probably is.
Scenario 3: Water near pastures in alpine terrain with mountains. The water is usually flowing, but perhaps there is reservoir, pond near cattle and could be not save to drink. Is UV or water filter enough?
Scenario 4: Emergency situation. Need to drink it from a pond, lake. The water is standing, perhaps a little muddy, but without any noticeable human presence.
I don't know there is potential issue with safety of UV lamps. Filters filter out most protozoa and bacterias. UV lamp just destroys part of their DNA and you still ingest that damaged DNA from deactivated protozoa and bacteria.
I don't know, what would you do and what are your experiences in that or similar scenarios.