St. Charles Parish, LA Water Table Trend
St. Charles Parish's groundwater trend, from USGS's own readings
St. Charles Parish's long-term well puts the trend at 0.4 ft per decade, holding roughly steady, based on 30 measurements since 1998.
One well stands in for St. Charles Parish's whole aquifer here, the honest simplification every page on this site carries.
What the well actually measured
The most recent reading put water 8.1 ft below land surface. Readings span 1998-11-03 to 2026-09-28, 30 measurements from USGS well USGS-295515090245001 (Sc-6027z), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where St. Charles Parish ranks
Of the 1,449 US counties with a usable trend, St. Charles Parish ranks 390th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 50,400 people live in St. Charles Parish, Louisiana. See the fastest-moving counties guide for how St. Charles Parish stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether St. Charles Parish's water table is rising or falling is independent of what's actually in the water. Depletion can concentrate naturally-occurring minerals, so it's worth checking directly with a water test rather than assuming a depth trend says anything about quality.