Frontenac County, Ontario · 44.63°N · Water Quality Report Card
Elbow Lake
Elbow Lake in Frontenac, Ontario received a water quality grade of B (Good). Water clarity: 3 m visibility. Phosphorus: 14.8 µg/L.
- Clarity
- 3 m
- Type
- Mesotrophic
Elbow Lake is a mesotrophic lake in Frontenac County, Ontario. Water quality is graded B based on 2 sampling years through 2025. Compared to the 106 other monitored lakes in Frontenac County, Elbow Lake ranks #89 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2025-10-02. 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 9.8 ft. Phosphorus level: 14.8 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 m | C |
| Phosphorus | 14.8 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Elbow Lake
Location
County Ranking
Ranked #89 of 107 lakes in Frontenac
Cleaner Lakes Within 30 Miles
Elbow Lake holds Grade B. 5 nearby lakes hold higher grades.
- AEagle LakeFrontenac · 4.4 mi · Higher grade (B → A)
- AElbow LakeFrontenac · 0.1 mi · Higher grade (B → A)
- ASt Andrew LakesFrontenac · 3.1 mi · Higher grade (B → A)
- ASt Andrews LakeFrontenac · 3.2 mi · Higher grade (B → A)
- ALong LakeFrontenac · 4.6 mi · Higher grade (B → A)
Nearby Lakes in Frontenac
Explore Elbow Lake across LakeGrade
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Other Grade B Lakes in Ontario
Mesotrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Elbow 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: 2025-10-02
Monitoring stations: