Total Withdrawal (gallons/day)
Each county in Kansas and Texas has been assigned a shade, corresponding to the amount of fresh groundwater withdrawals. The numerical values corresponding to the shades have been defined in the legend in gallons per day. To see how groundwater tables have changed since the 1940s, click on any of the Ogallala counties, bordered in cyan, in Kansas and Texas.
Source: U.S. Geological Survey
Map created by Jordan B. Bates and Aubrey Ann Parker, Circle of Blue’s web producer and chief data analyst, respectively. Sreeram Balakrishnan, Sheng Long, and Brett Walton contributed.
Values were published in numerous excel files from the U.S. Geological Survey.