Peterborough County, Ontario · Water Quality Report Card

Shadow Lake

C

Grade C — Fair

Limited DataEutrophic

Shadow Lake in Peterborough, Ontario received a water quality grade of C (Fair). Phosphorus: 46 µg/L.

Type: Eutrophic

Where to stay →Safe to swim?

Shadow Lake is a productive, nutrient-rich eutrophic lake in Peterborough County, Ontario. Water quality is graded C based on 1 sampling years through 2013. Compared to the 70 other monitored lakes in Peterborough County, Shadow Lake ranks #71 for water quality.

Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2013-05-22. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

No clarity data. Phosphorus level: 46 µg/L. Trophic State Index: 59.

Metric	Value	Grade
Water Clarity (Secchi Depth)	No data
Phosphorus	46 µg/L	C
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	59	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Shadow Lake

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Fishing Shadow Lake

→ Shadow Lake fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #71 of 71 lakes in Peterborough

Cleaner Lakes Within 30 Miles

Shadow Lake holds Grade C. 5 nearby lakes hold higher grades.

Nearby Lakes in Peterborough

Nogies Creek Lake

Explore Shadow Lake across LakeGrade

Lake Fishing Forecast

Species activity outlook by water temperature and season

Eutrophic Lakes

High nutrients, frequent algae, reduced clarity

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Other Grade C Lakes in Ontario

Central Ontario · 2.9 m

Haliburton · 3 m

Haliburton · 2.9 m

Roundabout Lake

Muskoka District · 2.4 m

Muskoka District · 1.8 m

Central Ontario · 1 m

Eutrophic Lakes in Ontario

Pine Lake Garter Snake Lake Bass Lake Scugog Lake

More records, surveys & data sources

Where this data comes from

Measurements for Shadow 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: 2013-05-22

Monitoring stations:

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