Marion County, SC Water Table Trend
Marion County, SC: the closest actual trend
The closest qualifying well to Marion County is 21 miles away in Florence County, SC, where the trend runs declining faster than most declining counties.
Marion County itself has no monitoring well with enough history to call its own trend, so treat this as a regional estimate, not Marion County's own number. If you own a well here, comparing your own depth log against this regional figure is worth doing before assuming either way. See Florence County, SC'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.
Marion County, South Carolina in brief
About 28,368 people live across Marion County's 489 square miles, in South Carolina. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Marion County isn't one of them yet, see the methodology guide for the exact qualifying bar.