Longairy Lake
Nipissing District, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for Longairy Lake. Here is what has been measured.
- 48 ft max depth
Longairy Lake in Nipissing District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 4 m visibility. Phosphorus: 6.5 µg/L.
Longairy Lake is a lake in Nipissing District County, Ontario with an estimated average depth of about 48 feet.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2002-06-04. Methodology: how these readings are compared.
What Longairy Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13.1 ft of visibility
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Longairy 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 Longairy Lake
These are the measurements Ontario MECP publishes for Longairy Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13.1 ft. Phosphorus 6.5 µg/L. TSI 36.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 6.5µg/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. | 36 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Longairy Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~14.6 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 Longairy Lake.
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Surface area
74 acres
HydroLAKES / HydroSHEDS
Shoreline
2.4 mi
HydroLAKES / HydroSHEDS
Elevation
1,388 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 Longairy Lake
Compare lakeside cabins, hotels, and vacation rentals near Longairy Lake in Nipissing District, Ontario — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Longairy Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Longairy Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Longairy Lake
Nearby Lakes in Nipissing District
Frequently asked questions about Longairy Lake
Where is Longairy Lake?
- Longairy Lake is a lake in Nipissing District, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of Longairy Lake?
- Longairy Lake in Nipissing District, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 4 m visibility. Phosphorus: 6.5 µg/L.
Is Longairy Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Longairy Lake?
- No published bathymetric survey covers Longairy Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 48 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Longairy Lake across LakeQuality
More lakes in Ontario
Other Lakes in Ontario
Oligotrophic Lakes in Ontario
Where this data comes from
Measurements for Longairy 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)