Twin Falls County, ID Water Table Trend
Is the water table dropping in Twin Falls County, ID?
Over 72 years of USGS readings, the well tracking Twin Falls County's aquifer is declining at a typical pace for a declining county: 1.4 ft per decade.
One well stands in for Twin Falls 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 180.3 ft below land surface. Readings span 1951-08-06 to 2023-04-03, 379 measurements from USGS well USGS-423207114215301 (10s 18e 20ddd1), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Twin Falls County ranks
Of the 1,449 US counties with a usable trend, Twin Falls County ranks 1132nd from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 96,509 people live in Twin Falls County, Idaho. See the fastest-moving counties guide for how Twin Falls County stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Twin Falls 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 Twin Falls 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.