Lyon County, IA Water Table Trend
The nearest real water-table reading to Lyon County, IA
The closest qualifying well to Lyon County is 35 miles away in Minnehaha County, SD, where the trend runs holding roughly steady.
Lyon County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Lyon 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 Minnehaha 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.
Lyon County, Iowa in brief
About 12,378 people live across Lyon County's 588 square miles, in Iowa. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Lyon County isn't one of them yet, see the methodology guide for the exact qualifying bar.