Is Gullfeather Lake safe to swim in?

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

Muskoka District County, Ontario · Water Quality Report Card

Gullfeather Lake

Grade B — Good

Mesotrophic

Gullfeather Lake in Muskoka District, Ontario received a water quality grade of B (Good). Water clarity: 2 m visibility. Phosphorus: 12.4 µg/L.

Clarity: 2 m
Type: Mesotrophic

Where to stay →Safe to swim?

Gullfeather Lake is a mesotrophic lake in Muskoka District County, Ontario. Water quality is graded B based on 2 sampling years through 2002. Compared to the 169 other monitored lakes in Muskoka District County, Gullfeather Lake ranks #139 for water quality.

Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2002-05-22. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Murky, only visible to about 6.6 ft. Phosphorus level: 12.4 µg/L. Trophic State Index: 45.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2 m	D
Phosphorus	12.4 µg/L	A
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	45	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Gullfeather Lake

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Fishing Gullfeather Lake

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

Location

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County Ranking

Ranked #139 of 170 lakes in Muskoka District

Cleaner Lakes Within 30 Miles

Gullfeather Lake holds Grade B. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Muskoka District

Explore Gullfeather 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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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

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Haliburton · 3 m

Haliburton · 2.9 m

Haliburton · 3 m

Haliburton · 3 m

Haliburton · 3.2 m

Mesotrophic Lakes in Ontario

Brady Lake Devil'S Lake Mcfadden Lake Lower Fletcher Lake

More records, surveys & data sources

Where this data comes from

Measurements for Gullfeather 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: 2002-05-22

Monitoring stations:

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