Maskinongé County, Québec · Water Quality Report Card
Lac Bill
Lac Bill in Maskinongé, Québec received a water quality grade of C (Fair). Water clarity: 1.3 m visibility. Phosphorus: 21 µg/L. Chlorophyll-a (algae): 20.9 µg/L.
- Clarity
- 1.3 m
- Type
- Eutrophic
Lac Bill is a productive, nutrient-rich eutrophic lake in Maskinongé County, Québec. Water quality is graded C based on 3 sampling years through 2025. Compared to the 31 other monitored lakes in Maskinongé County, Lac Bill ranks #32 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Murky, only visible to about 4.3 ft. Phosphorus level: 21 µg/L. Chlorophyll-a: 20.9 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 m | D |
| Phosphorus | 21 µg/L | B |
| Chlorophyll-a (Algae) | 20.9 µg/L | D |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Lac Bill
Location
County Ranking
Ranked #32 of 32 lakes in Maskinongé
Cleaner Lakes Within 30 Miles
Lac Bill holds Grade C. 5 nearby lakes hold higher grades.
- ALac VertMaskinongé · 0.7 mi · Two grade letters higher (C → A)
- ALac GareauMaskinongé · 1.8 mi · Two grade letters higher (C → A)
- AGrand Lac LongMaskinongé · 2.4 mi · Two grade letters higher (C → A)
- ALac GouletMaskinongé · 2.6 mi · Two grade letters higher (C → A)
- ALac BellemareMaskinongé · 0.5 mi · Two grade letters higher (C → A)
Nearby Lakes in Maskinongé
Explore Lac Bill across LakeGrade
More Québec Lake Rankings
Other Grade C Lakes in Québec
Eutrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac Bill 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: