Union County, SD Water Table Trend
What the closest monitoring well shows for Union County
The closest qualifying well to Union County is 26 miles away in Dixon County, NE, where the trend runs declining, slower than most declining counties.
Union County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Union County's own number. If you own a well here, comparing your own depth log against this regional figure is worth doing before assuming either way. See Dixon County, NE'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.
Union County, South Dakota in brief
About 17,402 people live across Union County's 461 square miles, in South Dakota. 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.