Carroll County, IA Water Table Trend
The nearest real water-table reading to Carroll County, IA
Crawford County, IA, 27 miles from Carroll County, is the closest county with a qualifying well, and its water table is declining, slower than most declining counties.
No well inside Carroll County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Carroll County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Crawford County, IA'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 Carroll County
Carroll County, Iowa covers 569 square miles and is home to about 20,407 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Carroll County isn't one of them yet, see the methodology guide for the exact qualifying bar.