Beaverhead County, MT Water Table Trend
Beaverhead County, MT: what the water table is actually doing
Beaverhead County's representative monitoring well shows depth to water declining at a typical pace for a declining county, a fitted trend of 3.6 ft per decade over 29 years of readings.
One well stands in for Beaverhead County's whole aquifer here, the honest simplification every page on this site carries.
What the well actually measured
The most recent reading put water 170.7 ft below land surface. Readings span 1997-11-19 to 2026-08-14, 154 measurements from USGS well USGS-450524112380701 (08s08w31ccaa01 Matador), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Beaverhead County ranks
Of the 1,449 US counties with a usable trend, Beaverhead County ranks 1264th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 10,006 people live in Beaverhead County, Montana. See the fastest-moving counties guide for how Beaverhead County stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Beaverhead County'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 Beaverhead County'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.