Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins
  • Data formats changed in August 2016, and additional water-data changes will be coming through 2017. Read more here
  • Full News RSS icon
Click to hide state-specific text


USGS 01395000 Rahway River at Rahway NJ


Click to hidestation-specific text
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.



LOCATION.--Lat 40°37'08", long 74°17'00" referenced to North American Datum of 1983, Rahway City, Union County, NJ, Hydrologic Unit 02030104, on left bank, 100 ft upstream from bridge on St. Georges Avenue in Rahway, and 0.9 mi upstream from Robinsons Branch, and 1.7 mi southwest of Linden.
DRAINAGE AREA.--40.9 mi2.
PERIOD OF RECORD.--July 1908 to April 1915 (gage heights and discharge measurements only), October 1921 to current year.
REVISED RECORDS.--WSP 781: Drainage area. WSP 1552: 1922-23(M), 1924, 1930-31(M), 1937. WDR NJ-79-1: 1978.
GAGE.--Water-stage recorder with telemetry and concrete control. Datum of gage is 8.77 ft above NGVD of 1929. Prior to Aug 25, 1934, non-recording gage at site 40 ft downstream from Church Street and 1,500 ft downstream from present site at datum 2.77 ft lower.
REMARKS.--Records good, except for estimated discharges, which are fair. Water for municipal supply diverted from river by cities of Rahway and Orange. The flow past this station is affected by diversions by pumpage from wells by the communities of Orange and South Orange, Springfield station of Elizabethtown Water Company (now New Jersey American Water Company, wells deactivated in late 1980s), by storage in the Lenape Park Detention Basin (since 1980), and by gate operations at Hansels Dam 5.6 mi upstream from gage in Cranford and Taylor Park Dam on the West Branch Rahway River in Millburn 11.6 mi upstream from gage.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 7,250 ft3/s, Aug 28, 2011, gage height, 12.10 ft, from high-water mark inside gage house; minimum discharge, 0.0 ft3/s, many days, an undetermined amount of negative flow may have occurred during tidal surge on Oct 29-30, 2012.


PERIOD OF RECORD.--Water years 1923-24, 1952, 1962, 1967-70, 1979 to current year.
REMARKS.--Discrete water-quality data were collected as part of the New Jersey Ambient Surface-Water-Quality Monitoring Network.

Peak Flood Chart

Gage Photo

National Weather Service flood stage for this gage is 6.0 feet.

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  2016-10-28
00065 Gage height 2007-10-01  2016-10-28

Graph w/ stats
Graph w/o stats
Graph w/ (up to 3) parms
Days  (7)

  -- or --
Begin date

End date

Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 54   10-28-2016   15:15 EDT
Graph of  Discharge, cubic feet per second

Add up to 2 more sites and replot for "Discharge, cubic feet per second"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert      

Daily discharge, cubic feet per second -- statistics for Oct 28 based on 94 years of record more
Median 75th
Mean Most Recent
Value Oct 28
0.10 5.9 12 28 49 54 663

Gage height, feet

Most recent instantaneous value: 1.76   10-28-2016   15:15 EDT
Graph of  Gage height, feet

Add up to 2 more sites and replot for "Gage height, feet"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert