Wanaque River

Last Updated: May 10, 2026

Total streamflow across the Wanaque River was last observed at 24 cfs, and is expected to yield approximately 48 acre-ft of water today; about 27% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 92 cfs, with recent peaks last observed on 2011-09-09 when daily discharge volume was observed at 3,790 cfs.

Maximum discharge along the river is currently at the Wanaque River At Awosting Nj reporting a streamflow rate of 24.3 cfs. This is also the highest stage along the Wanaque River, with a gauge stage of 2.04 ft at this location. This river is monitored from 2 different streamgauging stations along the Wanaque River, the highest being situated at an altitude of 603 ft, the Wanaque River At Awosting Nj.

The Wanaque River is a 16-mile-long tributary of the Passaic River in northern New Jersey, USA.


15-Day Long Term Forecast


River Details

Last Updated 2026-05-09
Discharge Volume 48 ACRE-FT
Streamflow 24.3 cfs
Past 24 Hours: -2.2 cfs (-8.3%)
Percent of Normal 26.53%
Maximum 3,790.0 cfs
2011-09-09
Seasonal Avg 92 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Wanaque River At Awosting Nj
USGS 01383500
24 cfs 2.04 ft -8.3
Wanaque R At Wanaque Nj
USGS 01387000
14 cfs 1.31 ft 0
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Wanaque River (Native American for "place of the sassafras") is a tributary of the Pequannock River in Passaic County in northern New Jersey in the United States.Once known as the Long Pond River, the source of the Wanaque River is Greenwood Lake, once known as Long Pond (not to be confused with the nearby village of Greenwood Lake in the state of New York).Both Greenwood Lake and the surrounding Sterling Forest watershed straddle the border of the states of New Jersey and New York.Downstream, the construction of dams at Monks and Wanaque created the Monksville and Wanaque reservoirs, respectively.From the Raymond Dam of the Wanaque Reservoir, the river flows to its confluence with the Pequannock River.