Safe Water
Seep / dig for groundwater
Universal fieldcraft: dig in damp sand of dry riverbeds, above high-tide lines, or at the base of cliffs where vegetation signals moisture.
At a glance
Energy investmentMedium energyDigging costs sweat—ironic in desert. Dig in shade, rest often, and stop if sand stays bone-dry.
ReliabilityMedium reliability
Time30–90 minutes for a usable seep in promising ground
Materials
- Digging tool or stout stick
- Cloth or improvised filter
- Container (bladder, bottle, bamboo, bark vessel)
Steps
- 1Identify likely moisture: green vegetation, animal tracks converging, cool sand in washes.
- 2Dig until water seeps; let sediment settle.
- 3Scoop carefully; filter through cloth into a clean container.
- 4Treat by boiling or other validated method before drinking.
- Digging on the inside bend or ridge tops where water never pools
- Contaminating the hole with dirty hands or tools
- Sweating out more water than you recover
Region fit
Best in: Temperate forest, Tropical jungle, Desert, Mountains, Coast & swamp · Poor in: Snow & ice
Temperate forestGood fit Tropical jungleGood fit DesertGood fit MountainsGood fit Snow & icePoor fit Coast & swampGood fit
Fit keyGood fitPoor fitAvoid
Other methods
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