Disinfection
1. Add 16 drops of liquid chlorine (household) bleach per gallon cool water. The only active ingredient should be 5.25% sodium hypochlorite. Stir and let stand for 30 minutes. Water must be cool or the chlorine will dissipate and be rendered useless.
2. Let stand for 30 minutes.
3. If it smells of chlorine, you can use it. If it does not smell of chlorine, add 16 more drops of chlorine bleach, let it stand for another 15 minutes, and smell it again. If it smells of chlorine, you can use it. If it does not smell of chlorine, discard and find another source of water.