Parry Sound District County, Ontario · 45.90°N · Water Quality Report Card
Portage Lake
Portage Lake in Parry Sound District, Ontario received a water quality grade of C (Fair). Water clarity: 2.2 m visibility.
- Clarity
- 2.2 m
- Type
- Mesotrophic
Portage Lake is a mesotrophic lake in Parry Sound District County, Ontario. Water quality is graded C based on 1 sampling years through 1998. Compared to the 230 other monitored lakes in Parry Sound District County, Portage Lake ranks #221 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 1998-09-13. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.2 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.2 m | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
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Fishing Portage Lake
Location
County Ranking
Ranked #221 of 231 lakes in Parry Sound District
Cleaner Lakes Within 30 Miles
Portage Lake holds Grade C. 5 nearby lakes hold higher grades.
- ANoganosh LakeParry Sound District · 14.6 mi · Two grade letters higher (C → A)
- BFrench River LakeSudbury District · 12.6 mi · Higher grade (C → B)
- BDollars LakeParry Sound District · 15.1 mi · Higher grade (C → B)
- BGurd LakeParry Sound District · 1.8 mi · Higher grade (C → B)
- BGrundy LakeParry Sound District · 2.1 mi · Higher grade (C → B)
Nearby Lakes in Parry Sound District
Explore Portage Lake across LakeGrade
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Other Grade C Lakes in Ontario
Mesotrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Portage 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: 1998-09-13
Monitoring stations: