Fill the can with water.
Add the contents of five calcium hypochlorite ampules.
(10) Close the can and shake it to mix the calcium hypochlorite with the
(11) Let the can stand for one hour.
(12) Empty the can. The can is now ready to be used to store drinking water.
Section II. FIELD WATER TREATMENT
EMERGENCY WATER SUPPLY
Units that are not able to obtain water from established quartermaster water
points must find and treat their own water. Water may be obtained from surface water
sources (lakes, rivers, streams, and ponds), from ground water sources (wells and
springs), and sometimes from public water supplies. In combat, there is usually not
sufficient time to search for the most desirable water supply. Advantage must be taken
of whatever water is available, provided it can be purified with the material at hand.
When time and the situation permit, a wider search for a better source is made. In
some locations, it may be necessary to use rainwater, distilled seawater, or melted ice
or snow. The availability of water is an important factor in the selection of bivouac sites
SELECTION OF WATER SOURCES
a. Types of Sources. The selection of a water source depends on the quantity
of water required, the accessibility of the source, the type of source, and the type of
water purification equipment on hand. If water is readily available and sources are free
from unusual impurities, the order of preference in the selection of sources is:
Public water supplies.
Wells or springs.
Surface water sources.
Rain, snow, or ice.
In an underdeveloped country, groundwater--wells and springs--may be
preferred over the public water system as the primary source of water.
b. Location. A source should be selected which is as free as possible from
known contamination. When several otherwise equally desirable sources are available,