Central Ontario County, Ontario · Water Quality Report Card
Mitchell Lake
Mitchell Lake in Central Ontario, Ontario received a water quality grade of B (Good). Water clarity: 2.2 m visibility. Phosphorus: 21.9 µg/L.
- Clarity
- 2.2 m
- Type
- Mesotrophic
Mitchell 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, Mitchell Lake ranks #17 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2025-10-25. 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 7.1 ft. Phosphorus level: 21.9 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.15 m | C |
| Phosphorus | 21.9 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Mitchell Lake
Location
County Ranking
Ranked #17 of 20 lakes in Central Ontario
Cleaner Lakes Within 30 Miles
Mitchell Lake holds Grade B. 5 nearby lakes hold higher grades.
- ABalsam LakeCentral Ontario · 5.8 mi · Higher grade (B → A)
- ACameron LakeCentral Ontario · 9.5 mi · Higher grade (B → A)
- ARush LakeCentral Ontario · 10 mi · Higher grade (B → A)
- ASilver LakeCentral Ontario · 11 mi · Higher grade (B → A)
- AShadow LakeCentral Ontario · 12.3 mi · Higher grade (B → A)
Nearby Lakes in Central Ontario
Explore Mitchell Lake across LakeGrade
More Ontario Lake Rankings
Other Grade B Lakes in Ontario
Mesotrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Mitchell 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: 2025-10-25
Monitoring stations: