Rainy River District County, Ontario · Water Quality Report Card
Apungsisagen Lake
Apungsisagen Lake in Rainy River District, Ontario received a water quality grade of B (Good). Water clarity: 1.6 m visibility. Phosphorus: 19.6 µg/L.
- Clarity
- 1.6 m
- Type
- Eutrophic
Apungsisagen Lake is a productive, nutrient-rich eutrophic lake in Rainy River District County, Ontario. Water quality is graded B based on 2 sampling years through 2025. Compared to the 79 other monitored lakes in Rainy River District County, Apungsisagen Lake ranks #57 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2025-05-27. 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 5.2 ft. Phosphorus level: 19.6 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 m | D |
| Phosphorus | 19.6 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Apungsisagen Lake
Location
County Ranking
Ranked #57 of 80 lakes in Rainy River District
Cleaner Lakes Within 30 Miles
Apungsisagen Lake holds Grade B. 5 nearby lakes hold higher grades.
- ALerome LakeRainy River District · 2.5 mi · Higher grade (B → A)
- AAbbess LakeRainy River District · 5.5 mi · Higher grade (B → A)
- AFinlayson LakeRainy River District · 11.6 mi · Higher grade (B → A)
- BSteep Rock LakeRainy River District · 3.7 mi · Higher overall water quality score
- BAbbess LakeRainy River District · 5.5 mi · Higher overall water quality score
Nearby Lakes in Rainy River District
Explore Apungsisagen Lake across LakeGrade
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Eutrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Apungsisagen 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: 2025-05-27
Monitoring stations: