Big Horn County, MT Water Table Trend
Big Horn County, MT: what the water table is actually doing
Big Horn County's long-term well puts the trend at 0.1 ft per decade, holding roughly steady, based on 47 measurements since 2002.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Big Horn County's source well, in detail
Depth to water at the last reading was 199.5 ft below land surface. Readings span 2002-12-11 to 2021-07-15, 47 measurements from USGS well USGS-452429106435201 (05s40e13adab01 Nc02-4), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Big Horn County compares nationally
Big Horn County sits at rank 706th 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. Big Horn County, Montana is home to about 12,796 people. See the fastest-moving counties guide for how Big Horn 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 Big Horn 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.