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State of Haryana - Section

Section 1072 in Punjab Jail Manual

1072. Purification of drinking water.

- Wells, cisterns, and reservoirs may be disinfected as follows :-
(a)A sufficient quantity of the solid potassium permanganate is to be added to give the water of the well a faint pink colour which lasts for at least 12 hours. Two ounces of the substance will be sufficient for an ordinary-sized clean well. This quantity should be dissolved in a bucket or two of water and poured into the well. Half an hour afterwards a specimen of the water should be drawn up and inspected. If pink colour is still present, enough has been employed, but if the pink colour has vanished, as may be the case if the well is dirty, a further quantity of permanganate should be added. The well should then be allowed to remain undisturbed as long as possible, but may be again opened for use of the following day.
(b)Lime may be used to purify a well, but it must be perfectly fresh so much so that when a certain amount is added to a small quantity of water, the heat developed ought to be sufficient to make the water boil. The quantity necessary may be calculated thus - Multiply the diameter of the well in feet by itself and the product by the number of feet of water in the well divide the result by 10, and the quotient gives the number of pounds of lime required.
Example. - If a well is 6 feet in diameter and there are 8 feet of water in it, the sum will
be =| 6x6x810| =| 28810| = 28.8 lbs. of lime