Montgomery County, IL Water Table Trend
What the closest monitoring well shows for Montgomery County
The closest qualifying well to Montgomery County is 36 miles away in Madison County, IL, where the trend runs rising, getting shallower over time.
Montgomery County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Montgomery County's own number. If you own a well here, comparing your own depth log against this regional figure is worth doing before assuming either way. See Madison 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.
Montgomery County, Illinois in brief
About 27,615 people live across Montgomery County's 704 square miles, in Illinois. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Montgomery County isn't one of them yet, see the methodology guide for the exact qualifying bar.