Total streamflow across the North Nashua River was last observed at 214 cfs, and is expected to yield approximately 425 acre-ft of water today; about 51% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 417 cfs, with recent peaks last observed on 2017-10-30 when daily discharge volume was observed at 7,260 cfs.

Maximum discharge along the river is currently at the North Nashua River Near Leominster reporting a streamflow rate of 121 cfs. However, the streamgauge with the highest stage along the river is the North Nashua River At Fitchburg with a gauge stage of 2.87 ft. This river is monitored from 2 different streamgauging stations along the North Nashua River, the highest being situated at an altitude of 399 ft, the North Nashua River At Fitchburg.