Mahaska County, IA Water Table Trend
The nearest real water-table reading to Mahaska County, IA
The closest qualifying well to Mahaska County is 24 miles away in Marion County, IA, where the trend runs holding roughly steady.
Mahaska County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Mahaska 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 Marion 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.
Mahaska County, Iowa in brief
About 22,034 people live across Mahaska County's 571 square miles, in Iowa. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Mahaska County isn't one of them yet, see the methodology guide for the exact qualifying bar.