Valley County, MT Water Table Trend
Valley County, MT: the closest actual trend
The closest qualifying well to Valley County is 65 miles away in McCone County, MT, where the trend runs holding roughly steady.
Valley County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Valley 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 McCone County, MT'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.
Valley County, Montana in brief
About 7,434 people live across Valley County's 4,926 square miles, in Montana. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Valley County isn't one of them yet, see the methodology guide for the exact qualifying bar.