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Links to Delaware geologic map datasets and water-table datasets; includes GIS-readable formats.
Maps and GIS data provided by The Kentucky Geological Survey; includes maps, elevation, geology data, hydrology data, and transportation...
USGS groundwater data, information, data, and maps for Georgia. In particular - Figure 2: Surface-water and ground-water data-collection stations...
USGS GIS data of the United States water resources maps, soil, hydrology, and weather. Contains multiple links to useful and informative websites.