Harrison County, IA Water Table Trend
Harrison County, IA: the closest actual trend
The closest qualifying well to Harrison County is 23 miles away in Washington County, NE, where the trend runs rising, getting shallower over time.
Harrison County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Harrison 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 Washington 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.
Harrison County, Iowa in brief
About 14,626 people live across Harrison County's 697 square miles, in Iowa. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Harrison County isn't one of them yet, see the methodology guide for the exact qualifying bar.