Water

13 guides

Boiling is the only universally effective method for killing all pathogens in water without special equipment. Proper te...

Organize community water supply, rationing, purification, and distribution to sustain a group through extended crisis.

Locate drinking water in urban, wilderness, and desert settings using environment-specific techniques from building infr...

Most waterborne illness after purification comes from recontamination; safe storage prevents this through container sele...

Learn to safely melt snow and ice for drinking water while avoiding the hypothermia spiral that kills through dehydratio...

Use clear plastic bottles and sunlight to disinfect water through UV-A radiation, a proven method endorsed by the WHO th...

Collect drinking water from atmospheric sources using dew, fog, and plant transpiration methods.

Select the optimal water purification method based on water source, contamination risk, and available resources.

Assess and rank water sources by contamination risk using visual, olfactory, and source-based indicators when testing eq...

Construct a layered sand-and-charcoal filter to remove sediment and some chemical contaminants from water. Filtration re...

Manage limited water supplies by calculating minimum daily needs, adjusting for activity level, recognizing dehydration ...

Construct a solar still using plastic sheeting and a container to extract water from soil, vegetation, or contaminated w...

Take immediate action when a contamination alert is issued: stop using tap water, protect your household, assess alterna...