The quality of water found depends upon the geological formations over which it flows or through which it percolates, and upon the previous use which man has made of it. Because of the growing scarcity of the supply, the increasing use per capita, the congestion of population and the occupation of even the desert and mountain slope, the securing of either safe potable water or water suited to manufacturing purposes becomes more and more difficult, and there is demanded a closer study of the countrys resources and of waters suited to the different uses. Restrictions will undoubtedly be adopted in the near future preventing not only sheer waste and pollution, but assigningvarious supplies to the most suitable uses. In other words, certain sources of water supply must be saved for the most important needs, and certain other sources must be so treated as to make them usable. Water unsatisfactory for one purpose may be or may be made quite satisfactory for another.
(Typographical errors above are due to OCR software and don't occur in the book.)
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