You can disregard these warnings if the label states sodium hypochlorite is the only active ingredient and if you use only the small quantities required. Seal your water containers tightly, label them and store them in a cool, dark place. If you have access to water, but it is not of drinking water quality, you can often purify the water. In addition to having a bad odor and taste, contaminated water can contain microorganisms that cause diseases such as dysentery, cholera, typhoid and hepatitis. There are many ways to purify water.
None are perfect.
Four easy purification methods are outlined below. These measures will kill microbes but will not remove other contaminants. Boiling is the safest method of purifying water. Bring water to a rolling boil for 10 minutes, keeping in mind that some water will evaporate. Let the water cool before drinking.