Haliburton County, Ontario · Water Quality Report Card
Coleman Lake
Coleman Lake in Haliburton, Ontario received a water quality grade of C (Fair). Water clarity: 3 m visibility.
- Clarity
- 3 m
- Type
- Mesotrophic
Coleman Lake is a mesotrophic lake in Haliburton County, Ontario. Water quality is graded C based on 1 sampling years through 2025. Compared to the 217 other monitored lakes in Haliburton County, Coleman Lake ranks #215 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2025-10-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 9.8 ft. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 m | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Coleman Lake
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Fishing Coleman Lake
Location
County Ranking
Ranked #215 of 218 lakes in Haliburton
Cleaner Lakes Within 30 Miles
Coleman Lake holds Grade C. 5 nearby lakes hold higher grades.
- ARedstone LakeHaliburton · 1.8 mi · Two grade letters higher (C → A)
- ABitter LakeHaliburton · 2 mi · Two grade letters higher (C → A)
- ABurdock LakeHaliburton · 2.4 mi · Two grade letters higher (C → A)
- AEagle LakeHaliburton · 2.9 mi · Two grade letters higher (C → A)
- BCruiser LakeHaliburton · 3.1 mi · Higher grade (C → B)
Nearby Lakes in Haliburton
Explore Coleman Lake across LakeGrade
More Ontario Lake Rankings
Other Grade C Lakes in Ontario
Mesotrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Coleman 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: 2025-10-27
Monitoring stations: