About This Information

The Massachusetts Department of Environmental Protection is in the process of revising the procedures for the “Frimpter Method” for estimating high groundwater levels based on the recent report “Updating Data Inputs, Assessing Trends, and Evaluating a Method To Estimate Probable High Groundwater Levels in Selected Areas of Massachusetts.” On Cape Cod, the Cape Cod Commission uses a slightly different method to estimate high groundwater levels.

During the transition to the new method, the statistics for the current methodology for estimating high groundwater levels have been updated until the new methodology is approved and released. The map and table on this web page provide information on wells in the Massachusetts Observation-Well Network which have been used as index wells in the calculation of high groundwater levels. Values of highest groundwater level (OWmax), lowest groundwater level, and maximum annual range (OWr) are based on monthly and daily measurements from the beginning of the record through September 30, 2022. The values of OWmax and OWr are used in conjunction with Probable High Ground-Water Levels in Massachusetts, USGS Open-File Report, 80-1205 to estimate probable high groundwater levels at sites in Massachusetts.

Map

Table with values for the Frimpter method

Disclaimer

Data include approved, quality-assured data that may be published, and more recent provisional data, whose accuracy has not been verified. The data are being provided to meet the need for timely best science, and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Last updated: May 31, 2023 Return to U.S. Geological Survey New England Water Science Center