Passaic River at Chatham
New Jersey — Water Level & Flood Stage
Located in Morris County, New Jersey on the Passaic River. Live water level data from USGS gauge 01379500, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
10 ft
Moderate Flood
8 ft
Minor Flood
6 ft
Action Stage
5.5 ft
886 cfs
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
11 ft
Flooding begins between University Avenue and Route 24, north of Main Street.
10 ft
Charwood and Brook Roads begin to flood. Passaic Street begins to flood near the intersection of Osborne Avenue. Edward Court begins to flood.
9 ft
Business parking lots between Chatham Road and the Passaic River flood.
8 ft
Businesses along John F. Kennedy Parkway, west of the Morris Turnpike, begin to flood.
6.5 ft
The Central and Bridge Avenue bridges in Chatham Township are subject to closures. Edgewood Road is closed.
6 ft
Portions of the Shepard Kolluck Park in Chatham floods. River Road by Henry Drive is subject to closures.
5.5 ft
Open areas adjacent to the Passaic River flood in New Providence, Chatham Township, and Berkley Heights.
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 1, 1973 | 9.36 ft | 3,380 cfs |
| Aug 1, 1973 | 9.36 ft | 3,380 cfs |
| Sep 1, 2021 | 8.41 ft | 3,047 cfs |
| Sep 1, 2021 | 8.41 ft | 3,047 cfs |
| Jan 8, 1905 | 8.3 ft | 3,000 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 Passaic 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 Passaic River at Chatham?
The Passaic River at Chatham gauge is maintained by USGS (site 01379500) 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 Passaic River at Chatham?
The NWS-defined flood stage for Passaic River at Chatham is 6 feet. Action stage begins at 5.5 feet. Moderate flooding starts at 8 feet, and major flooding at 10 feet.
How do I get alerts when Passaic River rises?
Download StormCast free on Google Play, go to River Gauges, and add Passaic River at Chatham to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Passaic River at Chatham gauge located?
The gauge is located in Morris County, New Jersey at coordinates 40.7261°N, 74.3897°W. USGS site number: 01379500. 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