Maui County, HI Water Table Trend
Maui County, HI: what the water table is actually doing
Maui County's long-term well puts the trend at 0.5 ft per decade, holding roughly steady, based on 455 measurements since 1947.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Maui County's source well, in detail
Depth to water at the last reading was 41.3 ft below land surface. Readings span 1947-06-08 to 2026-05-21, 455 measurements from USGS well USGS-210402156495801 (4-0449-01 Ualapue Shaft (S6), Molokai, Hi), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Maui County compares nationally
Maui County sits at rank 949th 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. Maui County, Hawaii is home to about 163,688 people. See the fastest-moving counties guide for how Maui 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 Maui 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.