Hamilton County, IL Water Table Trend
The nearest real water-table reading to Hamilton County, IL
Saline County, IL, 23 miles from Hamilton County, is the closest county with a qualifying well, and its water table is holding roughly steady.
No well inside Hamilton County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Hamilton County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Saline 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 Hamilton County
Hamilton County, Illinois covers 435 square miles and is home to about 7,818 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Hamilton County isn't one of them yet, see the methodology guide for the exact qualifying bar.