La Nouvelle-Beauce County, Québec · Water Quality Report Card
Lac O'Neil
Lac O'Neil in La Nouvelle-Beauce, Québec received a water quality grade of B (Good). Water clarity: 2.7 m visibility. Phosphorus: 7.8 µg/L. Chlorophyll-a (algae): 3.1 µg/L.
- Clarity
- 2.7 m
- Type
- Mesotrophic
Lac O'Neil is a mesotrophic lake in La Nouvelle-Beauce County, Québec. Water quality is graded B based on 3 sampling years through 2024. Compared to the 1 other monitored lakes in La Nouvelle-Beauce County, Lac O'Neil ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, MELCCFP, 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
Moderate clarity, visible to about 8.9 ft. Phosphorus level: 7.8 µg/L. Chlorophyll-a: 3.1 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.7 m | C |
| Phosphorus | 7.8 µg/L | A |
| Chlorophyll-a (Algae) | 3.1 µg/L | A |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac O'Neil
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Fishing Lac O'Neil
Location
County Ranking
Ranked #1 of 2 lakes in La Nouvelle-Beauce
Cleaner Lakes Within 30 Miles
Lac O'Neil holds Grade B. 2 nearby lakes hold higher grades.
- ALac EtcheminLes Etchemins · 14.8 mi · Higher grade (B → A)
- ALac TherrienBellechasse · 14.1 mi · Higher grade (B → A)
Nearby Lakes in La Nouvelle-Beauce
Explore Lac O'Neil across LakeGrade
More Québec Lake Rankings
Other Grade B Lakes in Québec
Mesotrophic Lakes in Québec
More records, surveys & data sources
Where this data comes from
Measurements for Lac O'Neil 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: