Harrison County, MO Water Table Trend
Harrison County's groundwater trend, from USGS's own readings
Over 17 years of USGS readings, the well tracking Harrison County's aquifer is declining at a typical pace for a declining county: 2.7 ft per decade.
One well stands in for Harrison 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 18.8 ft below land surface. Readings span 2008-11-05 to 2026-03-04, 47 measurements from USGS well MO005-402657093470201 (Cainsville), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
Where Harrison County ranks
Of the 1,449 US counties with a usable trend, Harrison County ranks 1234th from fastest-rising to fastest-declining, 1 is the fastest-rising water table measured, 1449 the fastest-declining. About 8,186 people live in Harrison County, Missouri. See the fastest-moving counties guide for how Harrison County stacks up against the most extreme cases nationally.
What a declining table means for a well pump
Because Harrison 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 Harrison 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.