Household water treatment and safe storage in emergencies : a field manual for Red Cross and Red Crescent personnel and volunteers

Clean water is a key factor in keeping people healthy, especially in an emergency. Water can be contaminated at the source, in the home, or during the journey in between.
A water source that is not protected, a dirty container, or unwashed hands can easily turn water, even water that looks and tastes clean, into something that makes people ill. There may be several reasons to improve the quality of the water. The most important is the removal of organisms like germs and parasites that cause disease.We may also want to remove suspended particles like dirt which make the water look and taste bad and that might be carrying germs which make people ill. [authors abstract']