Massac County, IL Water Table Trend
The nearest real water-table reading to Massac County, IL
Graves County, KY, 34 miles from Massac County, is the closest county with a qualifying well, and its water table is rising, getting shallower over time.
No well inside Massac County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Massac County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Graves County, KY'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 Massac County
Massac County, Illinois covers 237 square miles and is home to about 13,627 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Massac County isn't one of them yet, see the methodology guide for the exact qualifying bar.