Tillman County, OK Water Table Trend
Tillman County, OK: the closest actual trend
Caddo County, OK, 63 miles from Tillman County, is the closest county with a qualifying well, and its water table is declining at a typical pace for a declining county.
No well inside Tillman County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Tillman County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Caddo County, OK'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 Tillman County
Tillman County, Oklahoma covers 871 square miles and is home to about 6,736 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Tillman County isn't one of them yet, see the methodology guide for the exact qualifying bar.