Potentiometric contours illustrate the altitude at which water levels would stay consistent in tightly cased wells. Springs and wells are also highlighted on this map of the Upper Floridan aquifer in central Sumter County, Florida. (Lantz-PTT)
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USGS Numbered Series
Potentiometric surface of the upper Floridan aquifer in central Sumter County, Florida, May 1986
1 map :photocopy ;73 x 64 cm., on sheet 86 x 78 cm.