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Metropolitan Water District:
Metropolitan Sanitary District of Greater Chicago. Because of the fragmentation of government in the Chicago area, some important governing bodies are at least semiautonomous and do not have boundaries coextensive with those of the city. The metropolitan sanitary district of Greater Chicago, whose officers are elected from the county on a partisan basis, is an example of such a government.When the distance to remote sources m construction too expensive for a single commui to finance, regional water-supply systems w set up. The earliest in the United States wa: 1895—the Metropolitan Water District of Ma; chusetts, serving Boston and suburban commt ties within 10 miles of the city. It origin; served 18 communities with a population be] 900,000 and now serves 30 communities wit population of 1,600,000. (Consult Hazen, Jc nal of the American Water Works Associati vol. 50, p. 1137, 1958.) Beginnings of Water Treatment.—Of mote antiquity is the appreciation of the relat of the drinking water supply to disease.
A pilot plant to prove the concept was jointly authorized in 1967 by the Metropolitan Water District of Southern California and the U.S. Atomic Energy Commission. It will be built on a man-made island off the Pacific coast near Los Angeles, and will produce about a million kilowatts of electric power plus 150 million gal (570 million I) of fresh water per day. So far most analyses of nuclear-powered desalinization have indicated that the cost of the fresh water can eventually be reduced to 15 cents per thousand gallons and perhaps even to 7 cents.
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