Skip to main content
LakeQuality

Central Ontario County, Ontario · Water Quality Report Card

Sturgeon Lake

B
Grade B — Good
Mesotrophic

Sturgeon Lake in Central Ontario, Ontario received a water quality grade of B (Good). Water clarity: 2.9 m visibility. Phosphorus: 16.1 µg/L.

Clarity
2.9 m
Type
Mesotrophic
Where to stay →Safe to swim?

Sturgeon Lake is a mesotrophic lake in Central Ontario County, Ontario. Water quality is graded B based on 2 sampling years through 2025. Compared to the 19 other monitored lakes in Central Ontario County, Sturgeon Lake ranks #13 for water quality.

Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2025-09-01. Grade methodology: LakeGrade methodology.

Watch Sturgeon Lake water quality

Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.

Swimming Safety

Good for swimming, clear water with low algae levels

Compare the safest swimming lakes near Rochester →

Water Quality Grade: B, Good

Moderate clarity, visible to about 9.5 ft. Phosphorus level: 16.1 µg/L. Trophic State Index: 44.

MetricValueGrade
Water Clarity (Secchi Depth)2.9 mC
Phosphorus16.1 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)44Mesotrophic

Moderate nutrients, good water quality

Where to stay near Sturgeon Lake

Compare lakeside cabins, hotels, and vacation rentals near Sturgeon Lake in Central Ontario, Ontario — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Sturgeon Lake

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a trip to Sturgeon Lake?

Get lake water-quality report cards plus the best cabin & lodging deals near Sturgeon Lake — straight to your inbox. No spam, unsubscribe anytime.

Fishing Sturgeon Lake

Location

Loading map…

County Ranking

Ranked #13 of 20 lakes in Central Ontario

Cleaner Lakes Within 30 Miles

Sturgeon Lake holds Grade B. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Central Ontario

A
Cameron Lake
Central Ontario
C
Emily Lake
Central Ontario
A
Balsam Lake
Central Ontario
A
Four Mile Lake
Central Ontario
B
Pigeon River Lake
Central Ontario
A
Silver Lake
Central Ontario

Explore Sturgeon 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

Ontario's cleanest and most-polluted lakes, ranked

More Ontario Lake Rankings

Cleanest lakes in Ontario

Top 25 by overall water quality score

Clearest lakes in Ontario

Top 25 by Secchi water clarity

Best swimming lakes in Ontario

Grade A/B + low algae filter

Family fishing lakes in Ontario

Panfish-rich, public access

All Ontario lakes

Full state directory

Other Grade B Lakes in Ontario

Pigeon Lake

Peterborough · 3 m

Nogies Creek Lake

Peterborough · 1.6 m

Bass Lake

Peterborough · 3 m

Little Bald Lake

Peterborough · 2 m

Chemong Lake

Peterborough · 2.6 m

Buckhorn Lake

Peterborough · 2.9 m

Mesotrophic Lakes in Ontario

Pigeon LakeNogies Creek LakeBass LakeLittle Bald Lake
More records, surveys & data sources

Where this data comes from

Measurements for Sturgeon 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: 2025-09-01

Monitoring stations:

Where to stay near Sturgeon Lake →