Mackinac County, MI Water Table Trend
Mackinac County, MI: the closest actual trend
Chippewa County, MI, 39 miles from Mackinac County, is the closest county with a qualifying well, and its water table is rising, getting shallower over time.
No well inside Mackinac County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Mackinac County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Chippewa County, MI'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 Mackinac County
Mackinac County, Michigan covers 1,022 square miles and is home to about 11,144 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Mackinac County isn't one of them yet, see the methodology guide for the exact qualifying bar.