Letter Re: Clarification on Calcium Hypochlorite for Water Purification
Hello James, In reading your post on Tuesday May 16th on Water Purification, I have done some looking into this important topic. The link you provided from the EPA web site states below verbatim: “Granular Calcium Hypochlorite. Add and dissolve one heaping teaspoon of high-test granular calcium hypochlorite (approximately 1/4 ounce) for each two gallons of water. The mixture will produce a stock chlorine solution of approximately 500 mg/L, since the calcium hypochlorite has an available chlorine equal to 70 percent of its weight. To disinfect water, add the chlorine solution in the ratio of one part of chlorine solution …