O'Brien County, IA Water Table Trend
O'Brien County, IA: the closest actual trend
Jackson County, MN, 47 miles from O'Brien County, is the closest county with a qualifying well, and its water table is holding roughly steady.
No well inside O'Brien County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of O'Brien County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Jackson County, MN'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.
About O'Brien County
O'Brien County, Iowa covers 573 square miles and is home to about 14,260 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; O'Brien County isn't one of them yet, see the methodology guide for the exact qualifying bar.