Hardin County, IA Water Table Trend
The nearest real water-table reading to Hardin County, IA
The closest qualifying well to Hardin County is 23 miles away in Grundy County, IA, where the trend runs holding roughly steady.
Hardin County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Hardin 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 Grundy County, IA'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.
Hardin County, Iowa in brief
About 16,464 people live across Hardin County's 569 square miles, in Iowa. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Hardin County isn't one of them yet, see the methodology guide for the exact qualifying bar.