Martin County, FL Water Table Trend
Martin County, FL: what the water table is actually doing
Martin County's long-term well puts the trend at 0.2 ft per decade, holding roughly steady, based on 208 measurements since 1982.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Martin County's source well, in detail
Depth to water at the last reading was 21.8 ft below land surface. Readings span 1982-05-19 to 2026-08-13, 208 measurements from USGS well USGS-265822080052701 (M -1024), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Martin County compares nationally
Martin County sits at rank 515th 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. Martin County, Florida is home to about 165,666 people. See the fastest-moving counties guide for how Martin 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 Martin 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.