Green Brook at Plainfield
New Jersey — Water Level & Flood Stage
Located in Somerset County, New Jersey on the Green Brook. Live water level data from USGS gauge 01403600, 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
Action Stage
7 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Aug 1, 1973 | 13.6 ft | -9,999 cfs |
| Aug 1, 1973 | 13.6 ft | -9,999 cfs |
| Sep 1, 2021 | 12.24 ft | — |
| Sep 1, 2021 | 12.24 ft | — |
| Sep 15, 1999 | 12.17 ft | — |
About This Gauge
Get Flood Alerts for Green Brook
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 Green Brook at Plainfield?
The Green Brook at Plainfield gauge is maintained by USGS (site 01403600) 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 Green Brook at Plainfield?
This gauge has NWS-defined flood categories. Check the flood stages section above for current thresholds.
How do I get alerts when Green Brook rises?
Download StormCast free on Google Play, go to River Gauges, and add Green Brook at Plainfield 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 Green Brook at Plainfield gauge located?
The gauge is located in Somerset County, New Jersey at coordinates 40.6019°N, 74.4575°W. USGS site number: 01403600. 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