Brown County, IL Water Table Trend
Brown County, IL: the closest actual trend
Scott County, IL, 27 miles from Brown County, is the closest county with a qualifying well, and its water table is declining, slower than most declining counties.
No well inside Brown County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Brown County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Scott 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 Brown County
Brown County, Illinois covers 306 square miles and is home to about 6,307 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Brown County isn't one of them yet, see the methodology guide for the exact qualifying bar.