Is Clegge Lake safe to swim in?

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

Thunder Bay District County, Ontario · Water Quality Report Card

Clegge Lake

Grade B — Good

Oligotrophic

Clegge Lake in Thunder Bay District, Ontario received a water quality grade of B (Good). Water clarity: 2.7 m visibility. Phosphorus: 5.6 µg/L.

Clarity: 2.7 m
Type: Oligotrophic

Where to stay →Safe to swim?

Clegge Lake is a cold, clear oligotrophic lake in Thunder Bay District County, Ontario. Water quality is graded B based on 2 sampling years through 2024. Compared to the 301 other monitored lakes in Thunder Bay District County, Clegge Lake ranks #152 for water quality.

Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2024-08-01. 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 8.9 ft. Phosphorus level: 5.6 µg/L. Trophic State Index: 37.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.7 m	C
Phosphorus	5.6 µg/L	A
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	37	Oligotrophic

Low nutrients, clear water, excellent for swimming

Where to stay near Clegge Lake

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Fishing Clegge Lake

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

Location

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County Ranking

Ranked #152 of 302 lakes in Thunder Bay District

Cleaner Lakes Within 30 Miles

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

See full comparison →

Nearby Lakes in Thunder Bay District

Explore Clegge Lake across LakeGrade

Lake Fishing Forecast

Species activity outlook by water temperature and season

Oligotrophic Lakes

Low nutrients, clear water, excellent for swimming

The State of Ontario's Lakes

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Top 25 by overall water quality score

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Top 25 by Secchi water clarity

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Grade A/B + low algae filter

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Panfish-rich, public access

All Ontario lakes

Full state directory

Other Grade B Lakes in Ontario

Pyramid Lake

Kenora District · 2.3 m

Savoy Lake

Kenora District · 2.2 m

Mercutio Lake

Rainy River District · 2 m

Mattawa Lake

Kenora District · 2.7 m

Scotch Lake

Kenora District · 2.8 m

Other Man Lake

Rainy River District · 3 m

Oligotrophic Lakes in Ontario

Crooked Pine Lake Nydia Lake Eva Lake Blackstone Lake

More records, surveys & data sources

Where this data comes from

Measurements for Clegge 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: 2024-08-01

Monitoring stations:

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