Major Flood
12 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
9 ft
Minor Flood
8 ft
Action Stage
7.5 ft
What Floods at Each Level
12 ft
Major flooding along Route 202 and Route 17 intersection. Road closed. Flooding along Riverview Drive and along Halifax Road and Bridle Path Lane. Flooding on Brakeshoe Place, Brook Street and Catherine Avenue.
9 ft
State Route 202 floods downstream. Moderate flooding along Route 202 and Route 17. Water into backyards. Minor flooding along Brakeshoe Place, Brook Street and Catherine Avenue.
8 ft
Minor flooding along Route 202.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Aug 28, 2011 | 15.78 ft | — |
| Oct 15, 1955 | 12.53 ft | 10,900 cfs |
| Sep 16, 1999 | 12.52 ft | 13,800 cfs |
Flood Inundation Map
NOAA has mapped what areas flood at different water levels for this gauge. View the interactive flood inundation map →
About This Gauge
Get Flood Alerts for Ramapo River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Ramapo River at Mahwah?
The Ramapo River at Mahwah gauge is maintained by USGS (site 01387500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Ramapo River at Mahwah?
The NWS-defined flood stage for Ramapo River at Mahwah is 8 feet. Action stage begins at 7.5 feet. Moderate flooding starts at 9 feet, and major flooding at 12 feet.
How do I get alerts when Ramapo River rises?
Download StormCast free on Google Play, go to River Gauges, and add Ramapo River at Mahwah to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Ramapo River at Mahwah gauge located?
The gauge is located in Bergen County, New Jersey at coordinates 41.0975°N, 74.1633°W. USGS site number: 01387500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers