Water in the field

Water norm × people × days + purification methods

Parameters

Norm: drinking 2–3 l/day + cooking/hygiene 1–2 l. In heat or on climbs — 4–5 l. Plan water sources along the route and don't carry it all — filter. The combo 'filter + boil questionable water' is the gold standard.

Need

Total for trip
36 л
Carry per day
12 л (12 кг)
Boiling 1 min100%

Most reliable: bacteria, viruses, parasites

Filter 0.1–0.2 µm99.99%

Bacteria+parasites; viruses pass — need purifier or chemicals

Chemical (chlorine/iodine)99.9%

Wait 30 min–4 hrs; taste; crypto resists chlorine

UV purifier99.9%

Fast, no taste; needs clear water and batteries