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During winter months, cold and ice may result in inaccurate real-time gage height and streamflow data. Adjustments or deletions of this data can only be done after detailed analysis.

USGS 01387450 Mahwah River near Suffern NY


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National Weather Service flood stage for this gage is 4 feet. Gage readings are collected to Local Standard Time, which is Eastern Standard Time or Daylight Savings Time depending on the time of year.

Rain gage data is available from this location at this link.

gage photoLOCATION. --Lat 41°08'28", long 74°06'58" referenced to North American Datum of 1983, Ramapo Township, Rockland County, Hydrologic Unit 02030103, on left bank 13 ft upstream from bridge on U.S. Route 202, 4.8 mi upstream from mouth, and 2.5 mi northeast of Suffern.
DRAINAGE AREA. --12.3 mi2.
PERIOD OF RECORD. --Continuous-record gaging station, water years 1959-95, October 2005 to current year. Annual maximum, water years 1996 to 2005.
GAGE.--Water-stage recorder. Datum of gage is 321.57 ft above NGVD of 1929.
COOPERATION. --Funding for this gage is provided by the U.S. Army Corps of Engineers, New York District for the Passaic Flood Warning System.

Boating safety tips

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
All 2 Available Parameters for this site
00060 Discharge 2007-10-01  2016-09-28
00065 Gage height 2007-10-01  2016-09-28

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Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 2.2   09-28-2016   04:30 EDT
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Daily discharge, cubic feet per second -- statistics for Sep 28 based on 47 years of record more
Most Recent
Value Sep 28
Median 75th
Mean Max
0.80 2.2 2.5 6.4 12 14 128

Gage height, feet

Most recent instantaneous value: 1.47   09-28-2016   04:30 EDT
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