Groundwater Conditions in Massachusetts

USGS New England Water Science Center

PROVISIONAL DATA: All data presented in this report are provisional and subject to revision.
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Month 1

Month 2

 

 

Flow or Water Level Percentile Range Explanation
Low 0th The monthly mean streamflow or median water level during this month is the lowest ever recorded during the period of record for this site.
Much below normal 0th to 10th The monthly mean streamflow or median water level during this month is less than the 10th percentile when compared to all of the months during the period of record for this site.
Below normal 10th to 25th The monthly mean streamflow or median water level during this month is between the 10th and 25th percentiles when compared to all of the months during the period of record for this site.
Normal 25th to 75th The monthly mean streamflow or median water level during this month is between the 25th and 75th percentiles when compared to all of the months during the period of record for this site.
Above normal 75th to 90th The monthly mean streamflow or median water level during this month is between the 75th and 90th percentiles when compared to all of the months during the period of record for this site.
Much above normal 90th to 100th The monthly mean streamflow or median water level during this month is greater than the 90th percentile when compared to all of the months during the period of record for this site.
High 100th The monthly mean streamflow or median water level during this month is the highest ever recorded during the period of record for this site.