Human Water Needs:
In normal conditions the body needs at least 2 quarts of water per day. Usually you take in half of this amount through food and the other half from water. In desert conditions the body may use over a gallon of water a day.
Water is extremely important for almost every aspect of human health and survival. When water intake is reduced then many bodily functions are severely effected.

Where Water Can Be Found:
Bodies of water such as streams, rivers, lakes, and springs can be good places to look for drinkable water. These water sources are usually found in low-lying areas. Even if a streambed is dry in a river, water may still be found. In this case, try digging on the outside of a bend. Dig until you uncover damp sand then keep digging until water trickles into the hole. More often than not the water you gather using this technique will smell and taste unpleasant.

In dry or desert conditions search for water near cliffs. Choose a cliff where greener vegetation is growing then dig into a wet area. Once water starts to drip from the hole place a bottle underneath to catch it.

Another source of drinkable water is through collected rainwater in a depression in rock surfaces. This source of water is generally pure and free from human disease organisms.

Unfortunately, much of the water that you will get from natuarl sources may be contained with parasites. to purify this water, boil or filter it.