YOUR HUMAN BODY CAN ENDURE UP TO 48 HOURS OF NO WATER BEFORE THE DEADLY EFFECTS OF DEHYDRATION SET IN. ONE IMPORTANT THING TO REMEMBER ABOUT WATER AND YOUR SUPPLY OF WATER IS THAT IT WILL NOT ONLY BE USED FOR DRINKING BUT ALSO FOR COOKING, HYGIENE AND FIRST AID. A CLEAN SUPPLY OF WATER IS ESSENTIAL FOR SURVIVAL!!!