All water possibly contaminated by flooding must be disinfected. Drinking water may be treated by:
Boiling water for 3 minutes in a clear container. The flat taste can be eliminated by shaking the water in a bottle or by pouring it from one container to another.
Mixing half a teaspoon of liquid, unscented chlorine laundry bleach with 2 1/2 gallons of water and letting stand for 5 minutes before drinking.
Adding two drops of tincture of iodine solution to a quart of water. After mixing thoroughly, allow to stand for at least 30 minutes before drinking.
SOURCE: The Cape Girardeau County Public Health Center