Pontiac County, Ontario · Water Quality Report Card
Lower Allumette Lake
Lower Allumette Lake in Pontiac, Ontario received a water quality grade of B (Good). Water clarity: 1.5 m visibility. Phosphorus: 16.2 µg/L.
- Clarity
- 1.5 m
- Type
- Mesotrophic
Lower Allumette Lake is a mesotrophic lake in Pontiac County, Ontario. Water quality is graded B based on 2 sampling years through 2025. Compared to the 3 other monitored lakes in Pontiac County, Lower Allumette Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2025-08-01. 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 4.8 ft. Phosphorus level: 16.2 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.45 m | D |
| Phosphorus | 16.2 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lower Allumette Lake
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Fishing Lower Allumette Lake
Location
County Ranking
Ranked #3 of 4 lakes in Pontiac
Cleaner Lakes Within 30 Miles
Lower Allumette Lake holds Grade B. 2 nearby lakes hold higher grades.
- ADore LakeRenfrew · 14.9 mi · Higher grade (B → A)
- AMink LakeRenfrew · 16.6 mi · Higher grade (B → A)
Nearby Lakes in Pontiac
Explore Lower Allumette 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 Lower Allumette 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: 2025-08-01
Monitoring stations: