Rockingham County, NH Water Table Trend
Rockingham County, NH: what the water table is actually doing
Rockingham County's long-term well puts the trend at 0.1 ft per decade, holding roughly steady, based on 283 measurements since 1984.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Rockingham County's source well, in detail
Depth to water at the last reading was 38.2 ft below land surface. Readings span 1984-11-06 to 2017-05-31, 283 measurements from USGS well USGS-430527071140101 (Nh-Ddw 46), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Rockingham County compares nationally
Rockingham County sits at rank 736th 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. Rockingham County, New Hampshire is home to about 322,433 people. See the fastest-moving counties guide for how Rockingham 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 Rockingham 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.