Preliminary Assessment of Trends in Static Water Levels in Bedrock Wells in New Hampshire, 1984 to 2007 by U S Department of the Interior (Paperback / softback, 2014)
Analysis of nearly 60,000 reported values of static water level (SWL, as depth below land surface) in bedrock wells in New Hampshire, aggregated on a yearly basis, showed an apparent deepening of SWL of about 13 ft (4 m) over the period 1984-2007. Water-level data were one-time measurements at each well and were analyzed, in part, to determine if they were suitable for analysis of trends in groundwater levels across the state.