Columbia County, OR Water Table Trend
Columbia County, OR: the closest actual trend
Multnomah County, OR, 42 miles from Columbia County, is the closest county with a qualifying well, and its water table is holding roughly steady.
No well inside Columbia County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Columbia County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Multnomah County, OR'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.
About Columbia County
Columbia County, Oregon covers 659 square miles and is home to about 54,063 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Columbia County isn't one of them yet, see the methodology guide for the exact qualifying bar.