Humboldt County, CA Water Table Trend
Humboldt County, CA: the closest actual trend
Mendocino County, CA, 92 miles from Humboldt County, is the closest county with a qualifying well, and its water table is rising, getting shallower over time.
No well inside Humboldt County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Humboldt County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Mendocino County, CA'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 Humboldt County
Humboldt County, California covers 3,568 square miles and is home to about 132,380 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Humboldt County isn't one of them yet, see the methodology guide for the exact qualifying bar.