Major Flood
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.
Moderate Flood
6 ft
Minor Flood
5 ft
Action Stage
4.5 ft
What Floods at Each Level
7 ft
Significant flooding will affect interests along the river in Maynard, Concord and Hudson. Roadways may become impassable due to flood waters and some properties may need to be evacuated. Follow the directions of local emergency management officials.
6 ft
Flooding is likely in low lying sections along the river including portions of Maynard, Hudson and Concord. Water may approach homes along the river and may force several localized road closures.
5 ft
Minor lowland and backyard flooding is likely along reaches of the river in Maynard, Concord as well as Hudson. Several river roads may also become covered in water.
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 19, 1955 | 8.94 ft | 4,250 cfs |
| Mar 18, 1968 | 8.15 ft | 3,620 cfs |
| Jan 25, 1979 | 8.11 ft | 3,420 cfs |
About This Gauge
USGS Site
NWS LID
MAYM3
River
Assabet River
County
Middlesex, MA
Coordinates
42.4320°N, 71.4498°W
Get Flood Alerts for Assabet 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 Assabet River at Maynard?
The Assabet River at Maynard gauge is maintained by USGS (site 01097000) 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 Assabet River at Maynard?
The NWS-defined flood stage for Assabet River at Maynard is 5 feet. Action stage begins at 4.5 feet. Moderate flooding starts at 6 feet, and major flooding at 7 feet.
How do I get alerts when Assabet River rises?
Download StormCast free on Google Play, go to River Gauges, and add Assabet River at Maynard 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 Assabet River at Maynard gauge located?
The gauge is located in Middlesex County, Massachusetts at coordinates 42.4320°N, 71.4498°W. USGS site number: 01097000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.