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About a quarter of the United States’s irrigated cropland sits on top of the Ogallala Aquifer in the Great Plains. But water levels are dropping, and states are taking different approaches to monitoring how much groundwater irrigators are pumping out.
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After decades of irrigation, the aquifer that makes life possible in dry western Kansas is reaching a critical point. Several counties have already lost more than half of their underground water. But a new plan could save more of what’s left.