Total streamflow across the North Nashua River was last observed at 399 cfs, and is expected to yield approximately 791 acre-ft of water today; about 71% of normal. Average streamflow for this time of year is 561 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 262 cfs. This is also the highest stage along the North Nashua River, with a gauge stage of 3.14 ft at this location. 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.