Shadow Lake
Peterborough, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for Shadow Lake. Here is what has been measured.
- Limited data
Shadow Lake in Peterborough, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Phosphorus: 46 µg/L.
Shadow Lake is a lake in Peterborough County, Ontario.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2013-05-22. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Shadow Lake is safe to swim in today is a call for the Ontario Ministry of the Environment, Conservation and Parks and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Shadow Lake
These are the measurements Ontario MECP publishes for Shadow Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 46 µg/L. TSI 59.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 46µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 59 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Shadow Lake
Where is Shadow Lake?
- Shadow Lake is a lake in Peterborough, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of Shadow Lake?
- Shadow Lake in Peterborough, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Phosphorus: 46 µg/L.
Is Shadow Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Shadow Lake come from Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring), not the EPA Water Quality Portal. Per-sample source details are not recorded for this lake. Contains information licensed under the Open Government Licence – Ontario. See data sources.