Total streamflow across the Rahway River was last observed at 42 cfs, and is expected to yield approximately 83 acre-ft of water today; about 77% of normal. Average streamflow for this time of year is 54 cfs, with recent peaks last observed on 2021-09-02 when daily discharge volume was observed at 6,130 cfs.

Maximum discharge along the river is currently at the Rahway River At Rahway Nj reporting a streamflow rate of 28.6 cfs. This is also the highest stage along the Rahway River, with a gauge stage of 1.59 ft at this location. This river is monitored from 2 different streamgauging stations along the Rahway River, the highest being situated at an altitude of 67 ft, the Rahway River Near Springfield Nj.

The Rahway River is a 24-mile-long river in New Jersey that flows through Union, Essex, and Middlesex counties. It has a rich history, having been used for transportation and industry during the colonial and early industrial periods. The river's hydrology has been altered by human activity, including the construction of dams and reservoirs for water supply and flood control. One notable dam is the Lenape Park Dam in Cranford, which creates a popular recreational lake. The river also supports agriculture, with farms located along its banks. In recent years, efforts have been made to improve water quality and restore habitat for wildlife. Recreational activities on the river include fishing, boating, and hiking along its banks.