Mattawa River below Bouillon Lake water level

Name: Mattawa River below Bouillon Lake 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, Mattawa River, Ontario, Canada

Directions

Latest reading

Water level

8.50m Steady over the last 24 hours

Measured Oct 20, 2026, 08:45 PM EDT (1 hour ago)

Flow: 4.32 m³/s

History

7 days 30 days

Water level

What this means

The latest water level reported for Mattawa River below Bouillon Lake is 8.50 m. There is no published reference for this river yet, so we can't say whether that is high or low for the season.

It has barely moved over the past 24 hours. Over the past 30 days it has moved between 8.36 m and 8.50 m.

Over the past seven days the change adds up to +0.07 m.

The agency publishes no normal range for this gauge yet, so we show the trend only. How to read levels

Key numbers

Lowest and highest in 30 days: 8.36 m – 8.50 m
Lowest and highest in 12 months: 8.36 m – 8.49 m

Conditions at Mattawa River below Bouillon Lake

Paddlers should check the trend as well as the level; summer storms can raise rivers quickly.

Flood advisories come from the provincial river forecast centre.

Weather at the gauge

Rain in the last 3 days: 12 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 18° 9° – Wind 17 km/h

20 Tue 13° 3° – Wind 16 km/h

21 Wed 15° 1° – Wind 13 km/h

22 Thu 14° 4° – Wind 12 km/h

23 Fri 12° 0° – Wind 8 km/h

24 Sat 14° 1° – Wind 6 km/h

25 Sun 17° 5° – Wind 20 km/h

Forecast: Open-Meteo

Sunrise 07:42 AM Sunset 06:20 PM Daylight 10 hr, 39 min Waxing gibbous 73%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Ottawa River at MattawaRiver gauge, Ottawa River	52.47 m	Normal	+0.02 m	15 km
Aumond Creek near MattawaRiver gauge, Aumond Creek	3.61 m	Low	−0.01 m	33 km
Wasi River near AstorvilleRiver gauge, Wasi River	7.99 m	Very low	−0.01 m	34 km
La Vase River at North BayRiver gauge, La Vase River	10.63 m	Low	−0.02 m	38 km
Chippewa Creek at North BayRiver gauge, Chippewa Creek	13.21 m	Low	−0.02 m	42 km
Lake Nipissing at North BayLake, Lake Nipissing	5.64 m	Normal	−0.01 m	44 km
Ottawa River at ThorneRiver gauge, Ottawa River	9.45 m	Very low	+0.03 m	47 km
Lac Témiscamingue à TémiscamingLake, Lac Témiscamingue	5.07 m	Low	−0.01 m	49 km

Questions and answers

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 8.50 m on the gauge does not mean the water is that deep.

What is the water level of Mattawa River below Bouillon Lake today?

On Oct 20, 2026, 08:45 PM EDT, the water level was 8.50 m. Steady over the last 24 hours.

Is Mattawa River below Bouillon Lake rising or falling?

Steady over the last 24 hours. Up 0.07 m over the last 7 days.

Is the level of Mattawa River below Bouillon Lake normal?

The agency publishes no normal range for this gauge yet, so we show the trend only.

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.

Where does this data come from?

The values come directly from Environment and Climate Change Canada – Water Survey of Canada, the official operator of this gauge, and are published under the Open Government Licence – Canada. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: Environment and Climate Change Canada – Water Survey of Canada
Station code: eccc:02JE020 (Agency page)
Coordinates: 46.29889, -78.90722 (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	8.50 m	2026-10-21 00:45	Provisional
Flow	4.32 m³/s	2026-10-21 00:45	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Mattawa River below Bouillon Lake (eccc:02JE020). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/mattawa-river-below-bouillon-lake

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