Back in my river rafting days purifying water with bleach was done every night. No other chore is so important. Often the cleanest water available was the muddy river itself. We considered it safe to drink when treated.

5 gallon bucketful's of river water with a capful of household bleach were left to outgas overnight. In the morning it's put into jerry cans and tied down in the boats. The taste is something you learn to enjoy while admiring the scenery.