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Ramapo River at Pompton Lakes

Highest listed crest 22.62 ftFlood stage 11.5 ft18 crests since 1984

The Ramapo River at Pompton Lakes crested at major flood stage 9 times among the 18 crests the National Weather Service lists from 1984 to 2024. The highest, 22.62 ft on August 29, 2011, was major flooding, 11.12 feet above flood stage. 1 other gauge on the Ramapo River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
22.62 ft
August 29, 2011
Flood stage
11.5 ft
Major flooding from 14.5 ft
Crests at major
9
13th of 125 gauges in New Jersey
Most recent flood crest
January 10, 2024
13.79 ft, moderate flooding
Location
Passaic County
Near Pompton Lakes (0.8 mi), Oakland (3.4 mi), Wanaque (3.5 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Ramapo River at Pompton Lakes
Action stage10.04May 1, 2014The level at which the NWS or its partners begin to take action
Flood stage (minor)11.51Dec 24, 2007Minimal or no property damage, but possibly some public threat
Moderate flood stage13.54Jan 10, 2024Some inundation of structures and roads near the stream
Major flood stage14.59Dec 18, 2023Extensive inundation of structures and roads

Every listed crest

18 crests from 1984 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Ramapo River at Pompton Lakes, 1984 to 2024 10152025ft Flood stage 11.5 ftMajor 14.5 ft Apr 5, 1984: 21.60 ft, major flooding; 15,400 cubic feet per secondMar 29, 2005: 10.58 ft, action stage; 3,090 cubic feet per secondApr 3, 2005: 14.22 ft, moderate flooding; 6,930 cubic feet per secondOct 13, 2005: 13.66 ft, moderate flooding; 6,340 cubic feet per secondApr 16, 2007: 16.99 ft, major flooding; 9,930 cubic feet per secondDec 24, 2007: 13.02 ft, minor flooding; 5,670 cubic feet per secondDec 12, 2008: 11.03 ft, action stage; 3,590 cubic feet per secondMar 14, 2010: 18.05 ft, major floodingMar 31, 2010: 11.12 ft, action stageMar 7, 2011: 15.83 ft, major flooding; 8,706 cubic feet per secondMar 11, 2011: 16.72 ft, major flooding; 9,650 cubic feet per secondApr 17, 2011: 14.80 ft, major floodingAug 29, 2011: 22.62 ft, major floodingSep 8, 2011: 14.33 ft, moderate flooding; 7,096 cubic feet per secondMay 1, 2014: 10.80 ft, action stage; 3,430 cubic feet per secondSep 2, 2021: 14.53 ft, major flooding; 7,514 cubic feet per secondDec 18, 2023: 15.87 ft, major flooding; 9,115 cubic feet per secondJan 10, 2024: 13.79 ft, moderate flooding; 6,664 cubic feet per second Highest, 22.62 ft, Aug 29, 2011 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Ramapo River at Pompton Lakes 1980s: 1 1990s: 0 2000s: 4 2010s: 6 6 2020s: 3 1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Ramapo River at Pompton Lakes
1Aug 29, 201122.62+11.12Major—
2Apr 5, 198421.60+10.10Major15,400
3Mar 14, 201018.05+6.55Major—
4Apr 16, 200716.99+5.49Major9,930
5Mar 11, 201116.72+5.22Major9,650
6Dec 18, 202315.87+4.37Major9,115
7Mar 7, 201115.83+4.33Major8,706
8Apr 17, 201114.80+3.30Major—
9Sep 2, 202114.53+3.03Major7,514
10Sep 8, 201114.33+2.83Moderate7,096
11Apr 3, 200514.22+2.72Moderate6,930
12Jan 10, 202413.79+2.29Moderate6,664
13Oct 13, 200513.66+2.16Moderate6,340
14Dec 24, 200713.02+1.52Minor5,670
15Mar 31, 201011.12−0.38Action—
16Dec 12, 200811.03−0.47Action3,590
17May 1, 201410.80−0.70Action3,430
18Mar 29, 200510.58−0.92Action3,090

The worst floods along the Ramapo River

For this gauge's highest crests, the other gauges on the Ramapo River that crested above flood stage within a week.

August 29, 2011: 22.62 ft here, major flooding

  • MahwahNJ · Aug 28, 2011 · 15.78 ft · Major · its highest

April 5, 1984: 21.60 ft here, major flooding

  • SuffernNY · Apr 5, 1984 · 15.38 ft · Minor · its highest

March 11, 2011: 16.72 ft here, major flooding

  • MahwahNJ · Mar 7, 2011 · 11.16 ft · Moderate

Gauges on the Ramapo River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Ramapo River
SuffernNY15.215.38 ft, Apr 5, 19840
MahwahNJ8.015.78 ft, Aug 28, 20113
Pompton Lakes this gaugeNJ11.522.62 ft, Aug 29, 20119

Other gauges in Passaic County

Flood gauges in Passaic County
N. Haledon6.010.93 ft, May 16, 19902
Beatties Dam11.314.10 ft, Aug 30, 20110
Clifton (Dundee Dam)4.58.40 ft, Oct 10, 19031
Little Falls7.014.19 ft, Aug 30, 201122
Singac8.512.44 ft, Dec 20, 20231
Macopin5.57.75 ft, Mar 12, 19362
Riverdale8.013.60 ft, Apr 5, 19842
Pompton Plains16.025.24 ft, Aug 29, 201116
Wanaque6.010.82 ft, Apr 5, 19842

Passaic County: every hazard · River floods across the country · New Jersey

NOAA National Water Prediction Service, gauge PPTN4, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.