In an emergency situation (e.g. flooding, heavy rainfall), tap water may not be safe to drink or use. The following are the guidelines in purifying water according to the Philippine Department of Health:
Water must be filtered first to trap and remove large impurities. Any clean cloth or coffee filter can be used as a sieve.
Boiling water kills all potential germs you may get from contaminated water. Heat water and allow it to boil for two minutes then let it cool.
Water can be disinfected by adding two drops of 5% chlorine solution (unscented bleach) for every one liter of unrefrigerated water. Allow it to stand for an hour. If a faint chlorine smell is detected after an hour, then it is safe to drink.
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