(1)Drinking-water shall not be supplied from any open well or reservoir, unless it is so constructed, situated, protected, and maintained as to be free from the possibility of pollution by chemical, or bacterial and extraneous impurities.(2)Where drinking water is supplied from such well or reservoir, the water in it shall be sterilised once a week or more frequently if the Inspector by written order so requires and the date on which sterilising is carried out shall be recorded :Provided that the requirement shall not apply to any such well or reservoir, if the water therein is filtered and treated to the satisfaction of the Health Officer before it is supplied for consumption.
