Allen Parish, LA Water Table Trend
Is the water table dropping in Allen Parish, LA?
Allen Parish's long-term well puts the trend at 0.9 ft per decade, declining, slower than most declining counties, based on 216 measurements since 1957.
One well stands in for Allen 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 36.1 ft below land surface. Readings span 1957-12-30 to 2026-09-22, 216 measurements from USGS well USGS-303004092541101 (Al-241), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Allen Parish ranks
Of the 1,449 US counties with a usable trend, Allen Parish ranks 1054th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 22,501 people live in Allen Parish, Louisiana. See the fastest-moving counties guide for how Allen Parish stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Allen Parish's water table is actually declining, not just a general worry, a well owner here should consider comparing home-warranty plans that cover well-pump failure before one happens.
A dropping table says nothing about water quality
Whether Allen 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.