Grass River at Chase Mills water level

Name: Grass River at Chase Mills 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, Grass River, New York, United States

Directions

Normal for mid-October

Water level

5.19ft Down 0.09 ft over the last 24 hours

Measured Oct 18, 2026, 03:00 PM EDT (53 min ago)

Flow: 1,200 cfs

History

7 days

Water level Forecast

The forecast expects the river to fall to 5.10 ft by Tuesday, October 20 at 02:00 PM. Issued Sunday, October 18 at 11:08 AM by NOAA National Weather Service.

What this means

The Grass River at Chase Mills is at 5.19 ft, in the normal range for mid-October.

It has dropped 0.09 ft over the past 24 hours. The forecast expects the river to fall to 5.10 ft by Tuesday, October 20 at 02:00 PM. In the last month it has stayed between 5.19 ft and 5.28 ft.

Compared with 5 years of daily readings for this time of year. How to read levels

Key numbers

Highest on record: 8.48 ftAugust 11, 2024
Forecast peak: 5.20 ftSunday, October 18 at 02:00 PM

Floating and fishing near Grass River at Chase Mills

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

Highest crests on record

Rank	Level	Date
1	8.48 ft	August 11, 2024
2	8.16 ft	April 9, 2014
3	7.53 ft	September 18, 2005
4	7.44 ft	May 17, 2011
5	7.34 ft	November 1, 2017
6	7.11 ft	March 28, 2004
7	6.97 ft	December 29, 2008
8	6.90 ft	April 3, 2008
9	6.87 ft	December 3, 2006
10	6.83 ft	April 29, 2011

Weather at the gauge

Rain in the last 3 days: 0.35 in. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 56° 33° – Wind 13 mph

19 Mon 58° 42° – Wind 11 mph

20 Tue 57° 40° – Wind 8 mph

21 Wed 54° 35° – Wind 7 mph

22 Thu 57° 37° – Wind 12 mph

23 Fri 48° 31° – Wind 8 mph

24 Sat 53° 31° – Wind 11 mph

Forecast: Open-Meteo

Sunrise 07:20 AM Sunset 06:12 PM Daylight 10 hr, 52 min First quarter 52%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Raquette River at RaymondvilleRiver gauge, Raquette River	1,030 cfs	Normal	−370.0 cfs	4.9 mi
St. Regis River at Brasher CenterRiver gauge, St. Regis River	7.08 ft	Below flood stage	−0.15 ft	15 mi
South Branch South Nation River near Winchester SpringsRiver gauge, South Branch South Nation River	7.74 m	Very high	−0.30 m	28 km
South Nation River at ChestervilleRiver gauge, South Nation River	6.32 m	Very high	+0.03 m	31 km
Raisin River at Black RiverRiver gauge, Raisin River	5.22 m	Very high	−0.13 m	31 km
Oswegatchie River near HeuveltonRiver gauge, Oswegatchie River	2.92 ft	Below flood stage	+0.34 ft	23 mi
South Nation River at SpencervilleRiver gauge, South Nation River	11.15 m	Very high	±0	37 km
North Branch South Nation River near HeckstonRiver gauge, North Branch South Nation River	1.22 m	Very high	−0.15 m	38 km

Questions and answers

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 Grass River at Chase Mills today?

On Oct 18, 2026, 03:00 PM EDT, the water level was 5.19 ft. Down 0.09 ft over the last 24 hours.

Is Grass River at Chase Mills rising or falling?

Down 0.09 ft over the last 24 hours.

Is the level of Grass River at Chase Mills normal?

Normal for mid-October. Compared with 5 years of daily readings for this time of year.

What is the highest water level ever recorded at Grass River at Chase Mills?

The highest level on record is 8.48 ft on August 11, 2024.

Is Grass River at Chase Mills expected to rise?

The forecast expects the river to fall to 5.10 ft by Tuesday, October 20 at 02:00 PM.

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:04265432 (Agency page)
Coordinates: 44.84653, -75.07844 (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	5.19 ft	2026-10-18 19:00	Provisional
Flow	1,200 cfs	2026-10-18 19:00	Provisional

Download

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How to cite

U.S. Geological Survey: Grass River at Chase Mills (usgs:04265432). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/new-york/grass-river-at-chase-mills

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