Action Stage
7 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.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Aug 11, 2024 | 8.48 ft | 19,200 cfs |
| Apr 9, 2014 | 8.16 ft | -9,999 cfs |
| Sep 17, 2005 | 7.53 ft | 10,300 cfs |
About This Gauge
USGS Site
NWS LID
CHAN6
River
Grass River
County
St. Lawrence, NY
Coordinates
44.8467°N, 75.0781°W
Get Flood Alerts for Grass 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 Grass River at Chase Mills?
The Grass River at Chase Mills gauge is maintained by USGS (site 04265432) 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 Grass River at Chase Mills?
This gauge has NWS-defined flood categories. Check the flood stages section above for current thresholds.
How do I get alerts when Grass River rises?
Download StormCast free on Google Play, go to River Gauges, and add Grass River at Chase Mills 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 Grass River at Chase Mills gauge located?
The gauge is located in St. Lawrence County, New York at coordinates 44.8467°N, 75.0781°W. USGS site number: 04265432. Data is provided by the U.S. Geological Survey and the National Weather Service.
On This River
Downstream: Grass River at Massena
More Resources
Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey
- Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.