Duncan Lake
Timiskaming District, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for Duncan Lake. Here is what has been measured.
- 85 ft max depth
Duncan Lake in Timiskaming District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 2.2 m visibility. Phosphorus: 10.1 µg/L.
Duncan Lake is a lake in Timiskaming District County, Ontario with an estimated average depth of about 85 feet.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2019-06-08. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Duncan 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 Duncan Lake
These are the measurements Ontario MECP publishes for Duncan Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7.2 ft. Phosphorus 10.1 µg/L. TSI 43.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.2m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10.1µg/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. | 43 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Lake Details
Max depth
~25.9 m est.
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Ontario has not published bathymetry for Duncan Lake.
Lake Size & Watershed
Watershed (drainage) area
263 sq mi
HydroLAKES / HydroSHEDS
Surface area
2,471 acres
HydroLAKES / HydroSHEDS
Shoreline
46 mi
HydroLAKES / HydroSHEDS
Elevation
1,063 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
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Fishing Duncan Lake
Nearby Lakes in Timiskaming District
Frequently asked questions about Duncan Lake
Where is Duncan Lake?
- Duncan Lake is a lake in Timiskaming District, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of Duncan Lake?
- Duncan Lake in Timiskaming District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 2.2 m visibility. Phosphorus: 10.1 µg/L.
Is Duncan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Duncan Lake?
- No published bathymetric survey covers Duncan Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 85 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
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Where this data comes from
Measurements for Duncan 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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)