Total streamflow across the Hackensack River was last observed at 46 cfs, and is expected to yield approximately 91 acre-ft of water today; about 5% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,015 cfs, with recent peaks last observed on 2011-08-29 when daily discharge volume was observed at 14,660 cfs.

Maximum discharge along the river is currently at the Hackensack River At Rivervale Nj reporting a streamflow rate of 37.5 cfs. However, the streamgauge with the highest stage along the river is the Hackensack River At West Nyack Ny with a gauge stage of 2.39 ft. This river is monitored from 3 different streamgauging stations along the Hackensack River, the highest being situated at an altitude of 57 ft, the Hackensack River At West Nyack Ny.

The Hackensack River is a 45-mile long waterway that flows through northeastern New Jersey into Newark Bay, separating Bergen and Hudson counties. It was once a major transportation route for Native American tribes, Dutch traders, and American Revolutionary soldiers. The river's hydrology has been significantly altered over time, with wetlands drained and channels dredged for navigation and industry. Today, there are several reservoirs and dams along the river, including the Oradell Reservoir and the Woodcliff Lake Dam, which provide drinking water to millions of people in northern New Jersey. The river is also used for recreational activities such as fishing, boating, and hiking. However, it continues to face pollution challenges from urban runoff and industrial waste, and efforts are underway to improve water quality and restore habitat for wildlife.