How much of the powdered chlorine is to be used when storing large amounts of water? I know 16 drops of liquid 5% bleach is stated, need to know for powdered form like that used in backyard swimming pools?



In regards to your question on using powdered chlorine in place of liquid chlorine bleach for water purification there are a number of factors to consider.  The recommendations as you outlined are for a 5% bleach solution.  Not all tablets or powdered chlorine are the same strength- you would need to follow the manufacturer’s recommendations for  the amount needed of the product you have.  Many of the swimming pool products are not designed for consumption purposes and are not manufactured in conditions that would be required for products designed for human consumption (again, it is necessary to double check the product you have for safety and use).    Use of this product will also be affected by the consumer’s storage method and length of time it has been in storage since chlorine does dissipate when exposed to air.

For water storage, the recommendation is 1/8 teaspoon or 8 drops of liquid chlorine bleach per gallon of water.  Water from a chlorinated municipal water supply does not need further treatment when stored in clean, food-grade containers.  

Posted on 25 Jul 2008

Joanne Roueche
Family and Consumer Science Agent, Davis County

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