Is Goulais Lake safe to swim in?

Good for swimming, clear water with low algae levels. Goulais Lake has an overall water quality grade of B. Always check local health department advisories before swimming.

Algoma District County, Ontario · Water Quality Report Card

Goulais Lake

Grade B — Good

Mesotrophic

Goulais Lake in Algoma District, Ontario received a water quality grade of B (Good). Water clarity: 2.3 m visibility. Phosphorus: 9.4 µg/L.

Clarity: 2.3 m
Type: Mesotrophic

Where to stay →Safe to swim?

Goulais Lake is a mesotrophic lake in Algoma District County, Ontario. Water quality is graded B based on 2 sampling years through 2015. Compared to the 217 other monitored lakes in Algoma District County, Goulais Lake ranks #167 for water quality.

Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2015-05-14. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 7.4 ft. Phosphorus level: 9.4 µg/L. Trophic State Index: 42.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.25 m	C
Phosphorus	9.4 µg/L	A
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	42	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Goulais Lake

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Fishing Goulais Lake

→ Goulais Lake fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #167 of 218 lakes in Algoma District

Cleaner Lakes Within 30 Miles

Goulais Lake holds Grade B. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Algoma District

Explore Goulais Lake across LakeGrade

Lake Fishing Forecast

Species activity outlook by water temperature and season

Mesotrophic Lakes

Moderate nutrients, good water quality

The State of Ontario's Lakes

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Grade A/B + low algae filter

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Panfish-rich, public access

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Other Grade B Lakes in Ontario

Megisan Lake

Sudbury District · 2.1 m

Caesar Lake

Sudbury District · 3 m

Flame Lake

Sudbury District · 2 m

Wenebegon Lake

Sudbury District · 1.6 m

Kebsquasheshing R Lake

Sudbury District · 3 m

Wasasinka Lake

Sudbury District · 2 m

Mesotrophic Lakes in Ontario

Flame Lake Wenebegon Lake Mclennan Lake Kebsquasheshing R Lake

More records, surveys & data sources

Where this data comes from

Measurements for Goulais Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.

Data Sources

Water quality data from the EPA Water Quality Portal

Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion

Most recent sample: 2015-05-14

Monitoring stations:

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