File:Underground water resources of Iowa (1912) (14583564427).jpg

Identifier: undergroundwater00nort (find matches)
Title: Underground water resources of Iowa
Year: 1912 (1910s)
Authors: Norton, William Harmon, b. 1856 Hendrixson, Walter Scott, 1859- (from old catalog) joint author Simpson, Howard E. (Howard Edwin), 1874-1938, joint author Meinzer, Oscar Edward, 1876- (from old catalog) joint author Iowa. Geological survey. (from old catalog)
Subjects: Water-supply
Publisher: Washington, Govt. print. off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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n as the northeast, north-central, northwest, east-central, central, southeast, south-central, and southwest districts.The composition of the waters will be discussed according to thesedistricts, the analyses within each being arranged alphabetically bycounties. The tables contain both analyses of well waters madeoriginally for this report and those received from other sources. NORTHEAST AND NORTH-CENTRAL DISTRICTS. The northeast and north-central districts contain most of theslightly mineralized water of the State. The quahty of the v/atersin the two districts is so nearly the same that both may as well beconsidered together. With two exceptions—those of the deep wells at Bancroft andMcGregor—the solids of the deep-well waters do not reach 1,000parts per million, and in only three waters do they much exceed 500.The McGregor well is unnecessarily deep, for there are several othersat the same place and at North McGregor which have only about 140 UNDERGROUND WATER RESOURCES OF IOWA.
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CHEMICAL COMPOSITION OF UNDERGBOUND WATERS. 141 half its depth and yet yield an abundance of excellent water. Itsexcess of solids is due to salt, and it is the only well in these twodistricts that shows this substance in considerable amount. The following table shows the average amounts of certain con-stituents carried by the deep and the shallow wells in these twosections: Average mineral content of waters in northeast and north-central districts of Iowa. (Parts per million.) Source. Silica(Si02). Calcium(Ca). Magne-sium(Mg). Sodiumand po-tassium (Na+K). Bicar-bonateradicle(HCO3). Sulphateradicle(SO,). Chlorine (01). Totalsolids.0 NORTHEAST DISTRICT. 1015 11 18 63 89 8799 3132 3332 2816 20253 321347 328418 3883 92 68 2412 14 8.8 351 20 shallow wells NORTH-CENTRALDISTRICT. 7 deep weUs 388439 37 shallow wells 454 a The sum of the constituents minus one-half the bicarbonate radicle. The average solids for the deep wells and for the shallow wells ofthe districts are nearly the same. The

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