Sheridan Lake
Rainy River District, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for Sheridan Lake. Here is what has been measured.
- 77 ft max depth
Sheridan Lake in Rainy River District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 4.7 m visibility. Phosphorus: 7.3 µg/L.
Sheridan Lake is a lake in Rainy River District County, Ontario with an estimated average depth of about 77 feet. Overall water quality is declining over recent sampling years.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2010-05-04. Methodology: how these readings are compared.
What Sheridan Lake is good for
From access and monitoring records, not editorial picks.
- Clear water15.4 ft of visibility
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Sheridan 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 Sheridan Lake
These are the measurements Ontario MECP publishes for Sheridan Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 15.4 ft down. Phosphorus 7.3 µg/L. TSI 35.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.7m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 7.3µg/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. | 35 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Sheridan Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~23.5 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 Sheridan Lake.
Lake Size & Watershed
Watershed (drainage) area
31 sq mi
HydroLAKES / HydroSHEDS
Surface area
205 acres
HydroLAKES / HydroSHEDS
Shoreline
5 mi
HydroLAKES / HydroSHEDS
Elevation
1,381 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.
Stays via Stay22
Stays near Sheridan Lake
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Top-rated places to stay near Sheridan Lake
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Fishing Sheridan Lake
Water quality readings over time
3 seasons of samples on record (2021–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening3 years
Nearby Lakes in Rainy River District
Frequently asked questions about Sheridan Lake
Where is Sheridan Lake?
- Sheridan Lake is a lake in Rainy River District, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of Sheridan Lake?
- Sheridan Lake in Rainy River District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 4.7 m visibility. Phosphorus: 7.3 µg/L.
Is Sheridan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Sheridan Lake?
- No published bathymetric survey covers Sheridan Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 77 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 Sheridan 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)