The Vault — Water
Making water safe without power
Clean water is the first problem and the one that kills fastest if you get it wrong. The public version of this entry covers the four-step chain — source selection, sedimentation, filtration, and disinfection — and the most common mistake at each stage.
The single biggest error is skipping sedimentation: people filter cloudy water directly and clog or foul the filter in hours. Let it settle first.
Public entry. The full vault carries the sourcing and the detailed procedures, and backs the books.