Cochrane District County, Ontario · Water Quality Report Card
Black River Lake
Black River Lake in Cochrane District, Ontario received a water quality grade of D (Poor). Water clarity: 0.5 m visibility. Phosphorus: 38.3 µg/L.
- Clarity
- 0.5 m
- Type
- Eutrophic
Black River Lake is a productive, nutrient-rich eutrophic lake in Cochrane District County, Ontario. Water quality is graded D based on 2 sampling years through 2018. Compared to the 134 other monitored lakes in Cochrane District County, Black River Lake ranks #128 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2018-06-07. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 1.6 ft of visibility. Phosphorus level: 38.3 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.5 m | F |
| Phosphorus | 38.3 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Black River Lake
Location
County Ranking
Ranked #128 of 135 lakes in Cochrane District
Cleaner Lakes Within 30 Miles
Black River Lake holds Grade D. 4 nearby lakes hold higher grades.
- BRice LakeCochrane District · 12.3 mi · Two grade letters higher (D → B)
- BMcintosh LakeCochrane District · 13.7 mi · Two grade letters higher (D → B)
- BSouth Bear LakeCochrane District · 14.8 mi · Two grade letters higher (D → B)
- BBarber'S Bay LakeCochrane District · 14.9 mi · Two grade letters higher (D → B)
Nearby Lakes in Cochrane District
Explore Black River Lake across LakeGrade
More Ontario Lake Rankings
Other Grade D Lakes in Ontario
Eutrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Black River 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: 2018-06-07
Monitoring stations: