Ivanhoe Lake

Normal

Water level is right where you'd expect for mid-September and holding steady.

Low (341.14m)Normal rangeHigh (341.56m)

Current Weather

2d ago

11°CMostly Cloudy

Wind N 20 km/h

Humidity 69%

Chance of showers

Environment Canada — Chapleau - Gogama

vs. Last Year

No data available

7-Day Trend

→Stable

Changed less than 2.0 cm over the past week

-0.9 cm over 7 days

Seasonal Position

66th percentile

Based on 24 years of records

Seasonal Outlook

Typical next 7 days

This lake usually holds steady over the next week.

Typical next 14 days

Over two weeks, levels typically holds steady.

Tracking

This year is tracking near the seasonal norm.

Based on 24 years of seasonal patterns. Moderate historical coverage. This is a historical seasonal pattern, not a forecast.

Fish Consumption Advisories (6 species)

The following consumption advisories are in effect for fish caught in Ivanhoe Lake.

Lake Whitefish

Contaminant	Size	General pop.	Sensitive pop.
	25-30 cm	32/month	—
	30-35 cm	32/month	—
	35-40 cm	32/month	—
	40-45 cm	32/month	—
Mercury	45-50 cm	16/month	8/month
Mercury	25-30 cm	—	16/month
Mercury	30-35 cm	—	16/month
Mercury	35-40 cm	—	16/month
Mercury	40-45 cm	—	12/month

⚠Northern Pike

Contaminant	Size	General pop.	Sensitive pop.
Mercury	35-40 cm	16/month	4/month
Mercury	40-45 cm	8/month	4/month
Mercury	45-50 cm	8/month	Do not eat
Mercury	50-55 cm	8/month	Do not eat
Mercury	55-60 cm	4/month	Do not eat
Mercury	60-65 cm	4/month	Do not eat
Mercury	65-70 cm	4/month	Do not eat
Mercury	70-75 cm	4/month	Do not eat
Mercury	>75 cm	Do not eat	Do not eat

⚠Smallmouth Bass

Contaminant	Size	General pop.	Sensitive pop.
Mercury	40-45 cm	4/month	Do not eat
Mercury	35-40 cm	12/month	4/month

⚠Walleye

Contaminant	Size	General pop.	Sensitive pop.
Mercury	>75 cm	Do not eat	Do not eat
Mercury	50-55 cm	4/month	Do not eat
Mercury	55-60 cm	4/month	Do not eat
Mercury	60-65 cm	2/month	Do not eat
Mercury	65-70 cm	2/month	Do not eat
Mercury	70-75 cm	Do not eat	Do not eat
Mercury	15-20 cm	16/month	4/month
Mercury	20-25 cm	16/month	4/month
Mercury	25-30 cm	12/month	4/month
Mercury	30-35 cm	12/month	4/month
Mercury	35-40 cm	12/month	4/month
Mercury	40-45 cm	8/month	Do not eat
Mercury	45-50 cm	4/month	Do not eat

White Sucker

Contaminant	Size	General pop.	Sensitive pop.
	35-40 cm	32/month	—
Mercury	40-45 cm	16/month	8/month
Mercury	45-50 cm	16/month	8/month
Mercury	50-55 cm	16/month	4/month
Mercury	55-60 cm	12/month	4/month
Mercury	35-40 cm	—	12/month

⚠Yellow Perch

Contaminant	Size	General pop.	Sensitive pop.
	20-25 cm	32/month	—
	15-20 cm	32/month	—
Mercury	30-35 cm	8/month	Do not eat
Mercury	15-20 cm	—	16/month
Mercury	20-25 cm	—	16/month
Mercury	25-30 cm	16/month	4/month

Source: Guide to Eating Ontario Fish (2025). Advisory data is updated annually.

Lake Profile

Est. average depth7.2 m

Estimated from HydroLAKES v1.0 (Messager et al., 2016). Modeled geo-statistical estimate, not a direct survey measurement.

Water Level — Last 30 Days

Technical details

Current level: 341.36 m
Reference value: 341.36 m (rolling_6h_mean)
Percentile for date: 66th percentile
Years of record: 24
Source station: IVANHOE LAKE NEAR FOLEYET (04LC002)
Est. average depth: 7.2 m
Relationship type: direct_lake
Mapping confidence: medium
Today's normal range: 341.27–341.38 m
Same-date historical range: 341.14–341.56 m
30-day change: +8.9 cm
Data confidence: medium
Observed at: Sep 20, 2026
Last snapshot: Sep 20, 2026

Data source: ECCC Water Office — Station 04LC002. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.