Golden Horseshoe County, Ontario · Water Quality Report Card
Grenadier Pond
Grenadier Pond in Golden Horseshoe, Ontario received a water quality grade of D (Poor). Water clarity: 1 m visibility. Phosphorus: 63.1 µg/L.
- Clarity
- 1 m
- Type
- Eutrophic
Grenadier Pond is a productive, nutrient-rich eutrophic lake in Golden Horseshoe County, Ontario. Water quality is graded D based on 2 sampling years through 2025. Compared to the 2 other monitored lakes in Golden Horseshoe County, Grenadier Pond ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2025-10-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 3.3 ft of visibility. Phosphorus level: 63.1 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1 m | F |
| Phosphorus | 63.1 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Grenadier Pond
Location
County Ranking
Ranked #2 of 3 lakes in Golden Horseshoe
Cleaner Lakes Within 30 Miles
Grenadier Pond holds Grade D. 4 nearby lakes hold higher grades.
- AMary LakeYork Region · 21.9 mi · Two grade letters higher (D → A)
- AEaton LakeYork Region · 22.1 mi · Two grade letters higher (D → A)
- BWilcox LakeYork Region · 21.2 mi · Two grade letters higher (D → B)
- BSt George LakeYork Region · 21.9 mi · Two grade letters higher (D → B)
Nearby Lakes in Golden Horseshoe
Explore Grenadier Pond across LakeGrade
More Ontario Lake Rankings
Other Grade D Lakes in Ontario
Eutrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Grenadier Pond 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: 2025-10-20
Monitoring stations: