Upper Ammonoosuc River near Groveton water level

Name: Upper Ammonoosuc River near Groveton water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Upper Ammonoosuc River, New Hampshire, United States

Directions

Below flood stage

Water level

2.27ft Down 0.10 ft over the last 24 hours

Measured Oct 20, 2026, 01:30 PM EDT (26 min ago)

Flow: 210 cfs

History

7 days

Water level Minor flood stage

What this means

The Upper Ammonoosuc River near Groveton is at 2.27 ft, in the normal range.

It is 5.23 ft below the flood stage of 7.50 ft.

It has dropped 0.10 ft over the past 24 hours. In the last month it has stayed between 2.27 ft and 3.11 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 12.01 ftMay 20, 1969

Floating and fishing near Upper Ammonoosuc River near Groveton

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 7.50 ft, 5.23 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

10.00 ft: Major flooding occurs. Homes on Brooklyn Street flooded in Groveton. Water up to homes off West Street.
9.50 ft: Cumberland Road and Northside Road flooded in numerous places in Groveton.
9.00 ft: Moderate flooding occurs. Non-residential properties off West Street inundated. Water up to Winter Street and Route 110 in Groveton.
8.50 ft: In Stark, water is up to properties on Corkum Road and Northside Roads.
8.00 ft: Water up to Cumberland Street or Northside Road in Northumberland. Northside Road in Stark flooded.
7.50 ft: Minor floooding occurs. Mechanics Street inundated along industrial areas in Groveton. Water encroaching on properties on Brooklyn Street and Mountain View Avenue.
6.00 ft: River at bankfull.
2.27 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	12.01 ft	May 20, 1969
2	9.44 ft	March 27, 1953
3	9.01 ft	April 23, 1954
4	8.97 ft	March 31, 1998
5	8.91 ft	April 14, 2002
6	8.78 ft	April 15, 2014
7	8.64 ft	April 21, 2019
8	8.64 ft	April 24, 1996
9	6.96 ft	December 28, 2023

Weather at the gauge

The forecast is not available right now.

Sunrise 07:08 AM Sunset 05:55 PM Daylight 10 hr, 47 min Waxing gibbous 70%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Connecticut River at North StratfordRiver gauge, Connecticut River	3.68 ft	Below flood stage	−0.19 ft	12 mi
Androscoggin River below Bog Brook at Cambridge NHRiver gauge, Androscoggin River	1,150 cfs	Low	−10.0 cfs	14 mi
Androscoggin River near GorhamRiver gauge, Androscoggin River	3.03 ft	Below flood stage	±0	19 mi
Connecticut River near DaltonRiver gauge, Connecticut River	8.67 ft	Below flood stage	−0.36 ft	19 mi
Moose River at VictoryRiver gauge, Moose River	56.9 cfs	Normal	−14.8 cfs	20 mi
Androscoggin River at ErrolRiver gauge, Androscoggin River	1,060 cfs	Low	±0	20 mi
East Branch Passumpsic River near East HavenRiver gauge, East Branch Passumpsic River	2.26 ft	Below flood stage	−0.08 ft	21 mi
Peabody River at Gorham, New HampshireRiver gauge, Peabody River	59.9 cfs	Normal	−5.3 cfs	22 mi

Questions and answers

What is flood stage for the Upper Ammonoosuc River near Groveton?

The official flood stage is 7.50 ft. The level is currently 5.23 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Upper Ammonoosuc River near Groveton today?

On Oct 20, 2026, 01:30 PM EDT, the water level was 2.27 ft. Down 0.10 ft over the last 24 hours.

Is Upper Ammonoosuc River near Groveton rising or falling?

Down 0.10 ft over the last 24 hours.

Is the level of Upper Ammonoosuc River near Groveton normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at Upper Ammonoosuc River near Groveton?

The highest level on record is 12.01 ft on May 20, 1969.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:01130000 (Agency page)
Coordinates: 44.62505, -71.46897 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	2.27 ft	2026-10-20 17:30	Provisional
Flow	210 cfs	2026-10-20 17:30	Provisional

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How to cite

U.S. Geological Survey: Upper Ammonoosuc River near Groveton (usgs:01130000). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/new-hampshire/upper-ammonoosuc-river-near-groveton

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer