Description: This map from the U. S. Geological Survey Professional Paper 1403-1 shows the noncarbonate hardness of water in milligrams per liter from the Upper Floridan aquifer, current to 1989. The diagonals show 0-60 mg/l, the light shaded area shows 61-120 mg/l, the medium shaded area shows 121-180 mg/l and the dark shaded area shows greater than 180 mg/l. Noncarbonate hardness is due to alkaline-earth salts other than carbonates and bicarbonates.
Source: Craig L. Sprinkle, USGS Professional Paper 1403-1 (Washington, : U. S. Government Printing Office, 1989) 141
Map Credit: Courtesy the University of South Florida Library |
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