Jefferson Parish, LA Water Table Trend
Is the water table dropping in Jefferson Parish, LA?
Jefferson Parish's representative monitoring well shows depth to water rising, getting shallower over time, a fitted trend of 13.6 ft per decade over 52 years of readings.
One well stands in for Jefferson 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 22.6 ft below land surface. Readings span 1974-05-01 to 2026-08-04, 199 measurements from USGS well USGS-295739090094601 (Jf-156), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Jefferson Parish ranks
Of the 1,449 US counties with a usable trend, Jefferson Parish ranks 17th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 427,253 people live in Jefferson Parish, Louisiana. See the fastest-moving counties guide for how Jefferson Parish stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether Jefferson 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.