Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Neshanic River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Neshanic River, the highest being situated at an altitude of ft, the .

The Neshanic River is a 37-mile-long tributary of the Raritan River in New Jersey, USA. Historically, the river was significant to the Lenape Native American tribe, who used it for transportation, fishing, and agriculture. Today, the river supports a variety of recreational activities such as kayaking, fishing, and hiking, as well as agricultural uses such as irrigation and livestock watering. The river's hydrology is influenced by several dams and reservoirs, including the Round Valley Reservoir, which serves as a major source of drinking water for the surrounding communities. The river's water quality has been impacted by pollution from agricultural runoff and sewage treatment plants, leading to efforts to improve water quality through conservation and restoration projects.