Clinton County, IL Water Table Trend
Is the water table dropping in Clinton County, IL?
Over 21 years of USGS readings, the well tracking Clinton County's aquifer is declining at a typical pace for a declining county: 1.5 ft per decade.
One well stands in for Clinton 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 4.8 ft below land surface. Readings span 2003-03-12 to 2024-06-28, 82 measurements from USGS well USGS-383048089263201 (027-3-18-4159 (Clinton Idoa Crn)), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Clinton County ranks
Of the 1,449 US counties with a usable trend, Clinton County ranks 1137th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 37,087 people live in Clinton County, Illinois. See the fastest-moving counties guide for how Clinton County stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Clinton 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 Clinton 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.