Bleach for water sterilization

Bleach in the quantities mentioned cannon kill all organisms. Bleach should only be used if you have zero other options.

There are a few sources here. I can't speak to how effective any of them would be. I would trust Clorox before the others.

https://www.clorox.com/dr-laundry/disaster-preparedness-purifying-water/

By Dr. Laundry • October 31, 2012

    Thanks to Hurricane Sandy, the East Coast is really taking a beating
    from the weather, making this an important time to review how to use
    Clorox® Regular-Bleach (and New Concentrated Clorox® Regular-Bleach)
    for emergency disinfection of drinking water.  It’s not always
    practical in an emergency situation to boil water for 1 minute to
    make it safe to drink (especially if you are one of the 5 million
    people without any power right now, or the 1.5 million people who
    have been evacuated).  Here are some things to remember when
    treating water with Clorox® Regular-Bleach:

    Prior to addition of the bleach, it’s important to remove all
    suspended material from collected water by letting it settle to the
    bottom or by filtration.  This means that after you collect some
    water that hasn’t been treated, you need to let it sit long enough
    to let any debris settle to the bottom of the container.

    Next, decant the clarified contaminated water into a clean
    container, then add the bleach.  Use the table below to determine
    how much bleach to add—it depends on how much water you are
    treating.

    Allow the treated water to stand for 30 minutes.  Properly treated
    water should have a slight chlorine odor.

    If there’s no chlorine odor, then you need to repeat the treatment.
    Just add the same amount of bleach, and wait for another 15 minutes.
    Check again for the chlorine odor before drinking the water.

Amount of Clear Water	Amount of Clorox® Regular-Bleach	Amount of New Concentrated Clorox® Regular-Bleach
1 quart			        2 drops								2 drops
1 gallon				8 drops								6 drops
2 gallons				16 drops							12 drops, or 1/8 teaspoon
5 gallons				40 drops							30 drops

Here are some other important things to remember.

    ONLY use Clorox® Regular-Bleach or new Concentrated® Clorox®
    Regular-Bleach.  DO NOT use the Scented bleaches, High Efficiency
    bleach, Splash-Less bleach, Clorox® Ultimate Care Bleach, or the
    Clorox® Bleach Pen Gel.

    Use bleach that was purchased in the last 4 months.

    If the water you want to treat is cloudy and you can’t decant or
    filter it, add twice the amount of bleach recommended above.

    Check with your water service provider to confirm that your tap
    water is safe to drink.

    If you stocked up on bottled water, save the empty bottles!!  You
    can use some of them to collect untreated water, and others to store
    the water you treat.

Dr Laundry, Clorox

Mary Gagliardi "Dr. Laundry" With more than 10 years combined of
research and development, laboratory and real-world experience in stain
removal and laundry product testing.

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I removed an addlepated survival blog excretion I'd found as I consider
it more damaging than the government excretions below.

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http://www.doh.wa.gov/Emergencies/EmergencyPreparednessandResponse/Factsheets/WaterPurification

Treating water with household bleach containing 5.25-8.25 percent chlorine
Volume of Water to be Treated Bleach Solution to Add

1 quart/1 liter	5 drops
1/2 gallon	10 drops
2 quarts	10 drops
2 liters	10 drops
1 gallon	1/4 teaspoon
5 gallons       1 teaspoon
10 gallons      2 teaspoons

Caution: Bleach will not kill some disease-causing organisms commonly
found in surface water. Bleach will not remove chemical pollutants.

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EPA.gov only has it for 8.25% bleach

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Volume of Water Amount of Bleach to Add*
1 quart/liter 2 drops
1 gallon      6 drops
2 gallons     12 drops (1/8 teaspoon)
4 gallons     1/4 teaspoon
8 gallons     1/2 teaspoon

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CDC.gov has no percentage for the bleach so good luck with that

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Adding some bleach helps make water safe to use.

If tap water is clear:

1.Use bleach that does not have an added scent (like lemon).

2.Add 1/8 teaspoon (8 drops or about 0.75 milliliters) of household
liquid bleach to 1 gallon (16 cups) of water.

3. Mix well and wait 30 minutes or more before drinking.

If tap water is cloudy:
1.  Use bleach that does not have an added scent (like lemon).

2.Add 1/4 teaspoon (16 drops or 1.5 milliliters) of household liquid
bleach to 1 gallon (16 cups) of water.

3. Mix well and wait 30 minutes or more before drinking.