Union County, OR Water Table Trend
Union County, OR: the closest actual trend
The closest qualifying well to Union County is 70 miles away in Walla Walla County, WA, where the trend runs declining faster than most declining counties.
Union County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Union 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 Walla Walla County, WA'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.
Union County, Oregon in brief
About 26,058 people live across Union County's 2,037 square miles, in Oregon. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Union County isn't one of them yet, see the methodology guide for the exact qualifying bar.