Clark County, WA Water Table Trend
Clark County, WA: the closest actual trend
Multnomah County, OR, 16 miles from Clark County, is the closest county with a qualifying well, and its water table is holding roughly steady.
No well inside Clark County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Clark 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 Clark County
Clark County, Washington covers 629 square miles and is home to about 527,269 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Clark County isn't one of them yet, see the methodology guide for the exact qualifying bar.