Abstract
THE third annual report, compiled by Dr. Houston, of the Metropolitan Water Board, on the results of the chemical and bacteriological examination of the London waters for the twelve months ended March 31 has just been issued, and contains a mass of valuable information. The chief conclusions formulated by Dr. Houston may be summarised as follows. The raw waters from which the supplies are derived are usually unsatisfactory, particularly during the winter months, and a judicious selection for waterworks purposes is important. The storage is unequal, and in some cases inadequate in the different works; filtration is also unequal, and in some instances too rapid. The quality of the filtered water is likewise variable, and in some cases not altogether satisfactory, though a remarkable percentage improvement in the quality of the raw water is effected by storage and filtration; on the whole, however, the water supplied to the consumer is of satisfactory quality. Storage has been clearly proved to be advantageous in all respects. The recent investigations of the Board point to the fact that the present sources of the water supply of the metropolis may be regarded with less disfavour than previously.
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HEWLETT, R. Purification of Water by Storage . Nature 81, 269 (1909). https://doi.org/10.1038/081269a0
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DOI: https://doi.org/10.1038/081269a0