Clayton County, IA Water Table Trend
Clayton County, IA: the closest actual trend
The closest qualifying well to Clayton County is 26 miles away in Fayette County, IA, where the trend runs declining faster than most declining counties.
Clayton County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Clayton 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 Fayette 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.
Clayton County, Iowa in brief
About 16,931 people live across Clayton County's 778 square miles, in Iowa. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Clayton County isn't one of them yet, see the methodology guide for the exact qualifying bar.