Franklin County, MO Water Table Trend
Franklin County, MO: what the water table is actually doing
Franklin County's representative monitoring well shows depth to water rising, getting shallower over time, a fitted trend of 0.8 ft per decade over 70 years of readings.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Franklin County's source well, in detail
Depth to water at the last reading was 63.6 ft below land surface. Readings span 1956-04-28 to 2026-05-14, 83 measurements from USGS well MO005-382100090592801 (St. Clair), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Franklin County compares nationally
Franklin County sits at rank 293rd of 1,449 ranked counties, ordered rising-to-declining, so a low number means a rising water table and a high one means fast decline. Franklin County, Missouri is home to about 107,256 people. See the fastest-moving counties guide for how Franklin County stacks up against the most extreme cases nationally.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Franklin County can be stable in depth and still worth testing for quality, or declining and still test clean, the two are measured separately, and only a direct test settles the second one.