Sac County, IA Water Table Trend
Sac County, IA: the closest actual trend
Crawford County, IA, 28 miles from Sac County, is the closest county with a qualifying well, and its water table is declining, slower than most declining counties.
No well inside Sac County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Sac 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 Sac County
Sac County, Iowa covers 575 square miles and is home to about 9,533 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Sac County isn't one of them yet, see the methodology guide for the exact qualifying bar.