South Nation River at Chesterville water level

Name: South Nation River at Chesterville water level (Environment and Climate Change Canada – Water Survey of Canada)
Creator: Environment and Climate Change Canada – Water Survey of Canada
License: https://open.canada.ca/en/open-government-licence-canada

River gauge, South Nation River, Ontario, Canada

Directions

High for mid-October

Water level

6.28m Down 0.04 m over the last 24 hours

Measured Oct 19, 2026, 03:30 PM EDT (1 hour ago)

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The South Nation River at Chesterville is above normal at 6.28 m.

The median for mid-October is 5.97 m, based on 20 years of readings, so the water level is 0.30 m above typical. On the same day last year the reading was 6.01 m, a difference of +0.27 m.

It has dropped 0.04 m over the past 24 hours. In the last month it has stayed between 6.25 m and 6.37 m.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 20 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 5.97 m0.30 m above the median for this date
Normal for this date: 5.41 m – 6.31 m8 years in 10 fall in this range (20 years of records)
Same day last year: 6.01 m+0.27 m
Lowest and highest in 30 days: 6.25 m – 6.37 m
Lowest and highest in 12 months: 5.41 m – 6.37 m

On the river

Outside the spring freshet, most rivers settle into a gentler pattern, broken by storms.

Flood advisories come from the provincial river forecast centre.

About the South Nation River

The South Nation River is a river in Eastern Ontario, Canada. It springs from forests and marshes located north of Brockville, and it flows 175 kilometres (109 mi) northeast to empty into the Ottawa River north of Plantagenet. Its watershed covers 3,900 square kilometres (1,500 sq mi).

Weather at the gauge

Rain in the last 3 days: 14 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 17° 6° – Wind 20 km/h

20 Tue 13° 4° – Wind 14 km/h

21 Wed 12° 1° – Wind 12 km/h

22 Thu 15° 3° – Wind 16 km/h

23 Fri 10° 2° – Wind 16 km/h

24 Sat 12° 0° – Wind 9 km/h

25 Sun 15° 3° – Wind 22 km/h

Forecast: Open-Meteo

Sunrise 07:22 AM Sunset 06:11 PM Daylight 10 hr, 48 min First quarter 62%

Map

Other gauges on the South Nation River

Gauge	Level	Compared with normal	24 hours	Distance
South Nation River at SpencervilleRiver gauge, South Nation River	11.13 m	Very high	−0.02 m	38 km
South Nation River near Plantagenet SpringsRiver gauge, South Nation River	1.35 m	Very high	−0.39 m	50 km

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Payne River near BerwickRiver gauge, Payne River	6.32 m	Very high	−0.08 m	14 km
South Branch South Nation River near Winchester SpringsRiver gauge, South Branch South Nation River	7.58 m	Very high	−0.14 m	16 km
Castor River at RussellRiver gauge, Castor River	3.36 m	Very high	−0.08 m	20 km
South Castor River at KenmoreRiver gauge, South Castor River	1.54 m	Very high	−0.11 m	20 km
North Branch South Nation River near HeckstonRiver gauge, North Branch South Nation River	1.12 m	Very high	−0.09 m	26 km
Raisin River at Black RiverRiver gauge, Raisin River	5.01 m	Very high	−0.19 m	28 km
Grass River at Chase MillsRiver gauge, Grass River	937 cfs	Normal	−243.0 cfs	19 mi
Raquette River at RaymondvilleRiver gauge, Raquette River	1,060 cfs	Normal	+30.0 cfs	22 mi

Questions and answers

Is the South Nation River at Chesterville higher than last year?

Yes, it is 0.27 m higher than on the same day last year, when the reading was 6.01 m.

What is a normal level for the South Nation River at Chesterville in mid-October?

The median for mid-October is 5.97 m. In 8 years out of 10 the reading falls between 5.41 m and 6.31 m, based on 20 years of records.

Is the river level the same as the depth of the water?

No. The reading is measured from a fixed zero mark at the gauge, so 6.28 m on the gauge does not mean the water is that deep.

What is the water level of South Nation River at Chesterville today?

On Oct 19, 2026, 03:30 PM EDT, the water level was 6.28 m. Down 0.04 m over the last 24 hours.

Is South Nation River at Chesterville rising or falling?

Down 0.04 m over the last 24 hours. Down 0.05 m over the last 7 days.

Is the level of South Nation River at Chesterville normal?

High for mid-October. Compared with 20 years of daily readings for this time of year.

How often is this data updated?

Environment and Climate Change Canada – Water Survey of Canada publishes a new reading every hour. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: Environment and Climate Change Canada – Water Survey of Canada
Station code: eccc:02LB009 (Agency page)
Coordinates: 45.10108, -75.22608 (WGS84)
Vertical datum: station datum (assumed datum)
Update interval: every hour
Licence: Open Government Licence – Canada. Contains information licensed under the Open Government Licence – Canada

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	6.28 m	2026-10-19 19:30	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: South Nation River at Chesterville (eccc:02LB009). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/south-nation-river-at-chesterville

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