Thunder Bay District County, Ontario · Water Quality Report Card
Selwyn Lake
Selwyn Lake in Thunder Bay District, Ontario received a water quality grade of D (Poor). Water clarity: 1.3 m visibility.
- Clarity
- 1.3 m
- Type
- Eutrophic
Selwyn Lake is a productive, nutrient-rich eutrophic lake in Thunder Bay District County, Ontario. Water quality is graded D based on 1 sampling years through 2019. Compared to the 301 other monitored lakes in Thunder Bay District County, Selwyn Lake ranks #301 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2019-05-23. 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
Murky, only visible to about 4.3 ft. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 m | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Selwyn Lake
Location
County Ranking
Ranked #301 of 302 lakes in Thunder Bay District
Cleaner Lakes Within 30 Miles
Selwyn Lake holds Grade D. 5 nearby lakes hold higher grades.
- AWawang LakeThunder Bay District · 14.8 mi · Two grade letters higher (D → A)
- BSavoy LakeKenora District · 14.9 mi · Two grade letters higher (D → B)
- BMattawa LakeKenora District · 17 mi · Two grade letters higher (D → B)
- BPyramid LakeKenora District · 23.7 mi · Two grade letters higher (D → B)
- BLittle Metionga LakeThunder Bay District · 21.7 mi · Two grade letters higher (D → B)
Nearby Lakes in Thunder Bay District
Explore Selwyn 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 Selwyn 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: 2019-05-23
Monitoring stations: