A person needs 4 to 5 gallons of water per day to survive.
The Sphere Project Handbook “Humanitarian Charter and Minimum Standards in Disaster Response.” Quoted at “Water Facts,” www.water.org.
Les Roberts “Diminishing Standards: How Much Water Do We Need?” {in Forum: Water and War, International Committee of the Red Cross 1988.] Quoted at “Water Facts,” www.water.org.
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