Clay County, SD Water Table Trend
What the closest monitoring well shows for Clay County
The closest qualifying well to Clay County is 26 miles away in Cedar County, NE, where the trend runs holding roughly steady.
Clay County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Clay 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 Cedar 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.
Clay County, South Dakota in brief
About 15,245 people live across Clay County's 412 square miles, in South Dakota. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Clay County isn't one of them yet, see the methodology guide for the exact qualifying bar.