The High Plains aquifer extends from approximately 32 to 44 degrees north latitude and 96 degrees 30 minutes to 106 degrees west longitude. The aquifer underlies about 175,000 square miles in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. This dataset consists of a raster of estimated water-level changes for the High Plains aquifer from pre-irritation season, 2015 to pre-irritation season 2017. This digital dataset was created using water-level measurements from 7,699 wells measured in both 2015 and 2017. The map was reviewed for consistency with the relevant data at a scale of 1:1,000,000.