The U.S. Geological Survey, in cooperation with the Oklahoma Geological Survey and the Oklahoma Planning and Resources Board, is making water-level observations in 28 of the 77 counties in Oklahoma. Most of these counties are in the western half of the State, and the observations wells in them are selected to record water levels in many different aquifers. For example, water levels in some of the terrace materials or alluvium are less than 10 feet below the land surface, whereas those in the Garber sandstone and Wellington formation in Cleveland and Oklahoma Counties are about 300 feet below the land surface. So, when someone asks the general question, "Is the water level in Oklahoma going down?" a simple answer is impossible--we are interested in too many different water levels over the State to give such an answer.
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