Corson County, SD Water Table Trend
Corson County, SD: the closest actual trend
Sioux County, ND, 30 miles from Corson County, is the closest county with a qualifying well, and its water table is holding roughly steady.
No well inside Corson County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Corson County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Sioux County, ND's full page. See the no-data guide for why a county this close to a qualifying well still doesn't get its own number.
About Corson County
Corson County, South Dakota covers 2,470 square miles and is home to about 3,747 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Corson County isn't one of them yet, see the methodology guide for the exact qualifying bar.