Cochrane District County, Ontario · 49.19°N · Water Quality Report Card
Dora Lake
Dora Lake in Cochrane District, Ontario received a water quality grade of B (Good). Water clarity: 1.2 m visibility. Phosphorus: 19.3 µg/L.
- Clarity
- 1.2 m
- Type
- Eutrophic
Dora Lake is a productive, nutrient-rich eutrophic lake in Cochrane District County, Ontario. Water quality is graded B based on 2 sampling years through 2015. Compared to the 134 other monitored lakes in Cochrane District County, Dora Lake ranks #84 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2015-05-21. 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 3.9 ft. Phosphorus level: 19.3 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.2 m | D |
| Phosphorus | 19.3 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Dora Lake
Location
County Ranking
Ranked #84 of 135 lakes in Cochrane District
Cleaner Lakes Within 30 Miles
Dora Lake holds Grade B. 5 nearby lakes hold higher grades.
- ASilver Queen LakeCochrane District · 8.3 mi · Higher grade (B → A)
- BCommando LakeCochrane District · 9 mi · Higher overall water quality score
- BRawcourt LakeCochrane District · 13 mi · Higher overall water quality score
- BTailleurs LakeCochrane District · 13.9 mi · Higher overall water quality score
- BPool LakeCochrane District · 14.2 mi · Higher overall water quality score
Nearby Lakes in Cochrane District
Explore Dora Lake across LakeGrade
More Ontario Lake Rankings
Other Grade B Lakes in Ontario
Eutrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Dora 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: 2015-05-21
Monitoring stations: