Hamlin County, SD Water Table Trend
Hamlin County, SD: the closest actual trend
The closest qualifying well to Hamlin County is 39 miles away in Grant County, SD, where the trend runs rising, getting shallower over time.
Hamlin County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Hamlin 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 Grant 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.
Hamlin County, South Dakota in brief
About 6,596 people live across Hamlin County's 507 square miles, in South Dakota. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Hamlin County isn't one of them yet, see the methodology guide for the exact qualifying bar.