Union County, SC Water Table Trend
The nearest real water-table reading to Union County, SC
Chester County, SC, 26 miles from Union County, is the closest county with a qualifying well, and its water table is declining, slower than most declining counties.
No well inside Union County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Union County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Chester County, SC'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 Union County
Union County, South Carolina covers 514 square miles and is home to about 26,678 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Union County isn't one of them yet, see the methodology guide for the exact qualifying bar.