Dewey County, SD Water Table Trend
What the closest monitoring well shows for Dewey County
Walworth County, SD, 44 miles from Dewey County, is the closest county with a qualifying well, and its water table is rising, getting shallower over time.
No well inside Dewey County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Dewey County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Walworth County, SD'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 Dewey County
Dewey County, South Dakota covers 2,302 square miles and is home to about 5,322 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Dewey County isn't one of them yet, see the methodology guide for the exact qualifying bar.