Ramapo River

Last Updated: April 14, 2026

Total streamflow across the Ramapo River was last observed at 318 cfs, and is expected to yield approximately 630 acre-ft of water today; about 31% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,031 cfs, with recent peaks last observed on 2011-08-29 when daily discharge volume was observed at 37,320 cfs.

Maximum discharge along the river is currently at the Ramapo River At Pompton Lakes Nj reporting a streamflow rate of 218 cfs. This is also the highest stage along the Ramapo River, with a gauge stage of 7.49 ft at this location. This river is monitored from 4 different streamgauging stations along the Ramapo River, the highest being situated at an altitude of 300 ft, the Ramapo River At Ramapo Ny.

The Ramapo River is a tributary of the Pompton River, located in northeastern New Jersey.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-14
Discharge Volume 630 ACRE-FT
Streamflow 317.8 cfs
Past 24 Hours: +1.7 cfs (+0.54%)
Percent of Normal 30.81%
Maximum 37,320.0 cfs
2011-08-29
Seasonal Avg 1,031 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Ramapo River At Ramapo Ny
USGS 01387400
100 cfs 2.26 ft 1.73
Ramapo River At Suffern Ny
USGS 01387420
84 cfs 2.92 ft 3.82
Ramapo River Near Mahwah Nj
USGS 01387500
97 cfs 3.09 ft 3.85
Ramapo River At Pompton Lakes Nj
USGS 01388000
218 cfs 7.49 ft 0
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Ramapo River is a tributary of the Pompton River, approximately 30 mi (48 km) long, in southern New York and northern New Jersey in the United States.