Grafton County, NH Water Table Trend
Grafton County, NH: what the water table is actually doing
Grafton County's long-term well puts the trend at 0.2 ft per decade, holding roughly steady, based on 274 measurements since 1988.
This is one representative well, not a county-wide survey, the same grain limit every page here discloses.
Grafton County's source well, in detail
Depth to water at the last reading was 11.5 ft below land surface. Readings span 1988-06-14 to 2017-05-30, 274 measurements from USGS well USGS-434952071390901 (Nh-Cbw 34), part of the National Water Information System. The qualifying bar and the OLS fit behind this trend are documented in the methodology guide.
How Grafton County compares nationally
Grafton County sits at rank 784th 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. Grafton County, New Hampshire is home to about 93,045 people. See the fastest-moving counties guide for how Grafton 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 Grafton 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.