Rainy River District County, Ontario · Water Quality Report Card
Captain Tom Lake
Captain Tom Lake in Rainy River District, Ontario received a water quality grade of C (Fair). Water clarity: 1.7 m visibility. Phosphorus: 24.5 µg/L.
- Clarity
- 1.7 m
- Type
- Eutrophic
Captain Tom Lake is a productive, nutrient-rich eutrophic lake in Rainy River District County, Ontario. Water quality is graded C based on 2 sampling years through 2024. Compared to the 79 other monitored lakes in Rainy River District County, Captain Tom Lake ranks #78 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2024-08-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 5.6 ft. Phosphorus level: 24.5 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.7 m | D |
| Phosphorus | 24.5 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Captain Tom Lake
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Fishing Captain Tom Lake
Location
County Ranking
Ranked #78 of 80 lakes in Rainy River District
Cleaner Lakes Within 30 Miles
Captain Tom Lake holds Grade C. 5 nearby lakes hold higher grades.
- ABeaverhouse LakeRainy River District · 11.4 mi · Two grade letters higher (C → A)
- AThompson LakeRainy River District · 7 mi · Two grade letters higher (C → A)
- BWolesley LakeRainy River District · 10.9 mi · Higher grade (C → B)
- BLilac LakeRainy River District · 12.5 mi · Higher grade (C → B)
- BNamakan LakeRainy River District · 13.4 mi · Higher grade (C → B)
Nearby Lakes in Rainy River District
Explore Captain Tom Lake across LakeGrade
More Ontario Lake Rankings
Other Grade C Lakes in Ontario
Eutrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Captain Tom 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: 2024-08-01
Monitoring stations: