Nassau County, FL Water Table Trend
Nassau County, FL: the closest actual trend
Camden County, GA, 22 miles from Nassau County, is the closest county with a qualifying well, and its water table is declining, slower than most declining counties.
No well inside Nassau County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Nassau County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Camden County, GA'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 Nassau County
Nassau County, Florida covers 649 square miles and is home to about 104,376 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Nassau County isn't one of them yet, see the methodology guide for the exact qualifying bar.