Benton County, AR Water Table Trend
Benton County's groundwater trend, from USGS's own readings
Benton County's long-term well puts the trend at 4.3 ft per decade, rising, getting shallower over time, based on 17 measurements since 1977.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Benton County's source well, in detail
Depth to water at the last reading was 116.7 ft below land surface. Readings span 1977-02-01 to 2025-05-21, 17 measurements from USGS well USGS-362913094273101 (21n33w23aca1), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Benton County compares nationally
Benton County sits at rank 65th 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. Benton County, Arkansas is home to about 321,566 people. See the fastest-moving counties guide for how Benton 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 Benton 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.