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Share of each county's land under irrigation across the High Plains aquifer region, 127 counties. IrrigationPercent is irrigated acres as a share of county area; IrrigationAcres is the raw figure. This is the layer that
16 cities and urban clusters over the High Plains aquifer identified as at risk from groundwater depletion, with 2010 population, housing units and area. Includes Cactus, Texas and other High Plains communities dependent
Extent of the High Plains aquifer, also called the Ogallala — the largest aquifer in the United States, underlying parts of eight states from South Dakota to Texas. Unconsolidated sand and gravel. One polygon; useful as
