Amount of bleach for water storage : LUSENET : TimeBomb 2000 (Y2000) Preparation Forum : One Thread

From : Add four drops of bleach per quart of water (or two scant teaspoonsper 10 gallons)

Why don't they just say 1 cc per gallon? Same thing. Took me about 30 minutes to convert all these draconian measures to real world units. Been a long time since high school chemistry, so I had to look a bunch of it up.

With a syringe (new of course), you can quickly measure what you need without having to count drops.

-- Tryntohelp (, December 27, 1999


Tryntohelp, I believe it's 8 drops bleach per gallon of water, and as there are 20 drops in one cc (ml) then there would be 40 drops or 2 cc in each 5 gal water, or 1cc for each 2.5 gal water.

or, 8 drops * (1cc / 20 drops) = .4 cc in each gal. water.



-- Someone (, December 27, 1999.

I got this from Gary Norths site, personal prep category, epa guidelines for stored water:

CHLORINE BLEACH: Common household bleach contains a chlorine compound that will disinfect water. The procedure to be followed is usually written on the label. When the necessary procedure is not given, find the percentage of available chlorine on the label and use the information in the following tabulation as a guide.

Available Chlorine (Drops per Quart of Clear Water)

1% -- (10)

4-6% -- (2)

7-10% -- (1)

(If strength is unknown, add ten drops per quart of water. Double amount of chlorine for cloudy or colored water)

The treated water should be mixed thoroughly and allowed to stand for 30 minutes. The water should have a slight chlorine odor; if not, repeat the dosage and allow the water to stand for an additional 15 minutes. If the treated water has too strong a chlorine taste, it can be made more pleasing by allowing the water to stand exposed to the air for a few hours or by pouring it from one clean container to another several times.

-- Pat (h20@pumped.bygenerator), December 28, 1999. told me more than I wanted to know about the myriad means of water purification. It is loooooong.

-- RT (, December 28, 1999.

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