How much water can be purified with a gallon of Clorox bleach? Avoid using bleaches that contain perfumes, dyes and other additives. A bottle of 121 ounce Clorox will cost about $3.50 at China-mart. Thanks Clorox, we get 7 full ounces less for the size that looks like a gallon!
First we need to look at how to purify water with bleach (source). It takes 20 drops (1/4 teaspoon) for a gallon of untreated water, and 60 minutes.
Next, there are .945 gallons in the 121 ounce bottle. Plug that number into this converter, and you get 71,554 drops of bleach in 121 ounces. Let's just round down to 71,500 for an easier conversion for gallon amounts.
Divide 71,500 by 20 drops (amount for 1 gallon untreated water) and we can treat 3575 gallons.
For the price of $3.50, we can treat over 3500 gallons of water (10 gallons for a penny) and have sparkling whites.
Keep Right On Prepping - K