Nipissing District County, Ontario · Water Quality Report Card
Stoney Lake
Stoney Lake in Nipissing District, Ontario received a water quality grade of B (Good). Water clarity: 2 m visibility. Phosphorus: 11.9 µg/L.
- Clarity
- 2 m
- Type
- Mesotrophic
Stoney Lake is a mesotrophic lake in Nipissing District County, Ontario. Water quality is graded B based on 2 sampling years through 2024. Compared to the 280 other monitored lakes in Nipissing District County, Stoney Lake ranks #263 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
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 6.6 ft. Phosphorus level: 11.9 µg/L. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 m | D |
| Phosphorus | 11.9 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Stoney Lake
Location
County Ranking
Ranked #263 of 281 lakes in Nipissing District
Cleaner Lakes Within 30 Miles
Stoney Lake holds Grade B. 5 nearby lakes hold higher grades.
- ANorth LakeParry Sound District · 6 mi · Higher grade (B → A)
- APeyton LakeParry Sound District · 1.9 mi · Higher grade (B → A)
- BTrout LakeNipissing District · 0.5 mi · Higher overall water quality score
- BWindfall LakeParry Sound District · 3.5 mi · Higher overall water quality score
- BBig Bob LakeNipissing District · 3.9 mi · Higher overall water quality score
Nearby Lakes in Nipissing District
Explore Stoney Lake across LakeGrade
More Ontario Lake Rankings
Other Grade B Lakes in Ontario
Mesotrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Stoney 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: