LaSalle Parish, LA Water Table Trend
Is the water table dropping in LaSalle Parish, LA?
LaSalle Parish's representative monitoring well shows depth to water holding roughly steady, a fitted trend of 0.4 ft per decade over 57 years of readings.
One well stands in for LaSalle 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 50.1 ft below land surface. Readings span 1969-11-04 to 2026-06-23, 50 measurements from USGS well USGS-314153092080002 (La-151), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where LaSalle Parish ranks
Of the 1,449 US counties with a usable trend, LaSalle Parish ranks 905th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 14,702 people live in LaSalle Parish, Louisiana. See the fastest-moving counties guide for how LaSalle Parish stacks up against the most extreme cases nationally.
A dropping table says nothing about water quality
Whether LaSalle 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.