Henry County, IL Water Table Trend
The nearest real water-table reading to Henry County, IL
Bureau County, IL, 31 miles from Henry County, is the closest county with a qualifying well, and its water table is rising, getting shallower over time.
No well inside Henry County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Henry County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Bureau County, IL'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 Henry County
Henry County, Illinois covers 823 square miles and is home to about 48,177 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Henry County isn't one of them yet, see the methodology guide for the exact qualifying bar.