Lafayette Parish, LA Water Table Trend
Lafayette Parish, LA: what the water table is actually doing
Lafayette Parish's long-term well puts the trend at 1.5 ft per decade, declining at a typical pace for a declining county, based on 153 measurements since 1981.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Lafayette Parish's source well, in detail
Depth to water at the last reading was 49.4 ft below land surface. Readings span 1981-09-22 to 2026-06-25, 153 measurements from USGS well USGS-301426092000601 (Lf-662), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Lafayette Parish compares nationally
Lafayette Parish sits at rank 1146th 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. Lafayette Parish, Louisiana is home to about 254,241 people. See the fastest-moving counties guide for how Lafayette Parish stacks up against the most extreme cases nationally.
If you own a well in Lafayette Parish
A dropping water table means a residential pump has to reach deeper and work harder, which shortens its life. In Lafayette Parish, that trend is real, not assumed: 1.5 ft per decade over 45 years.
Depth and quality are separate questions
This page answers a depth question, not a quality one. A well in Lafayette Parish 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.