If you designate a water bed in your home as an emergency resource, drain it yearly and refill it with fresh water containing two ounces of bleach per 120 gallons. If you need to seek water outside your home, you can use the sources listed below if you purify the water before using or drinking it. Rainwater Streams, rivers and other moving bodies of water Ponds and lakes Natural springs Avoid water with floating material, an odor or dark color. 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.
Often the best solution is a combination of methods. If the water looks cloudy, filter it before purifying. First, let the water sit undisturbed so that any suspended particles settle to the bottom. Then filter the water through layers of clean paper or cotton towels, cheese cloth, or coffee filters. A clean cotton plug in a funnel will also work, as will filters designed for camping and backpacking.