King County, WA Water Table Trend
King County, WA: the closest actual trend
Kitsap County, WA, 39 miles from King County, is the closest county with a qualifying well, and its water table is rising, getting shallower over time.
No well inside King County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of King County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Kitsap 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.
About King County
King County, Washington covers 2,116 square miles and is home to about 2,340,211 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; King County isn't one of them yet, see the methodology guide for the exact qualifying bar.