Pettis County, MO Water Table Trend
Pettis County's groundwater trend, from USGS's own readings
Pettis County's long-term well puts the trend at 9.7 ft per decade, declining faster than most declining counties, based on 54 measurements since 1971.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Pettis County's source well, in detail
Depth to water at the last reading was 196.4 ft below land surface. Readings span 1971-05-06 to 2026-04-08, 54 measurements from USGS well MO005-384832093192501 (Sedalia), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Pettis County compares nationally
Pettis County sits at rank 1385th 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. Pettis County, Missouri is home to about 43,791 people. See the fastest-moving counties guide for how Pettis County stacks up against the most extreme cases nationally.
If you own a well in Pettis County
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Pettis County, that trend is real, not assumed: 9.7 ft per decade over 55 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Pettis 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.