South Nation River at Chesterville water level
River gauge, South Nation River, Ontario, Canada
Right now
Very high for mid-October
Water level
History
20252026
What this means
The South Nation River at Chesterville is well above normal at 6.33 m.
The median for mid-October is 5.97 m, based on 20 years of readings, so the water level is 0.36 m above typical. On the same day last year the reading was 6.01 m, a difference of +0.33 m.
It has risen 0.02 m over the past 24 hours. If the rise continues, low-lying paths and riverside parking can go under water. 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 m0.36 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+0.33 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
Flood levels and safety
A high reading on its own does not mean property is at risk. The warnings issued by the provincial river forecast centre take local defences and the forecast into account.
Readings can change quickly after heavy rain upstream, so check again before heading near the water.
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).
Text and image from Wikipedia and Wikimedia Commons, licensed under CC BY-SA.
Weather at the gauge
The forecast is not available right now.
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 | 11.14 m | Very high | −0.01 m | 38 km |
| South Nation River near Plantagenet SpringsRiver gauge, South Nation River | 1.50 m | Very high | −0.44 m | 50 km |
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Payne River near BerwickRiver gauge, Payne River | 6.34 m | Very high | −0.10 m | 14 km |
| South Branch South Nation River near Winchester SpringsRiver gauge, South Branch South Nation River | 7.62 m | Very high | −0.19 m | 16 km |
| Castor River at RussellRiver gauge, Castor River | 3.39 m | Very high | −0.10 m | 20 km |
| South Castor River at KenmoreRiver gauge, South Castor River | 1.57 m | Very high | −0.14 m | 20 km |
| North Branch South Nation River near HeckstonRiver gauge, North Branch South Nation River | 1.15 m | Very high | −0.10 m | 26 km |
| Raisin River at Black RiverRiver gauge, Raisin River | 5.10 m | Very high | −0.19 m | 28 km |
| Grass River at Chase MillsRiver gauge, Grass River | 1,030 cfs | Normal | −260.0 cfs | 19 mi |
| Raquette River at RaymondvilleRiver gauge, Raquette River | 1,080 cfs | Normal | −140.0 cfs | 22 mi |
Questions and answers
Is the South Nation River at Chesterville higher than last year?
Yes, it is 0.33 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 6.33 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, 06:45 AM EDT, the water level was 6.33 m. Up 0.02 m over the last 24 hours.
Is South Nation River at Chesterville rising or falling?
Up 0.02 m over the last 24 hours. Steady over the last 7 days.
Is the level of South Nation River at Chesterville normal?
Very 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 | 6.33 m | 2026-10-19 10:45 | 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