Long Lake
Cape Breton, Nova Scotia27 haView mapDirections
NSECC publishes the water-quality measurements for Long Lake. Here is what has been measured.
- 89 ft max depth
- Limited data
Long Lake in Cape Breton, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 5.8 m visibility. Maximum depth: 88.6 ft. Surface area: 67.7 acres.
Long Lake is a 68-acre lake in Cape Breton County, Nova Scotia with a maximum depth of 89 feet (24-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1975-08-15. Methodology: how these readings are compared.
What Long Lake is good for
From access and monitoring records, not editorial picks.
- Clear water19 ft of visibility
- Deep water88.6 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Long Lake is safe to swim in today is a call for Nova Scotia Environment and Climate Change and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Long Lake
These are the measurements NSECC publishes for Long 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 19 ft down. TSI 35.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.8m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading 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 Long Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
27 m
Average depth
7.4 m
Surface area
27 ha
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Frequently asked questions about Long Lake
Where is Long Lake?
- Long Lake is a lake in Cape Breton, Nova Scotia. Its water-quality measurements are published by NSECC and shown on this page as reported.
What is the water quality of Long Lake?
- Long Lake in Cape Breton, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 5.8 m visibility. Maximum depth: 88.6 ft. Surface area: 67.7 acres.
Is Long Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Long Lake?
- Long Lake has a maximum depth of 88.6 feet and an average depth of 24.3 feet. The lake covers 67.7 acres.
Explore Long Lake across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 1975. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- DFO
DFO1 sample · 1975
Monitoring station identifiers (1)
22
Canadian lakes are published with the measurements their provincial programme reports. See where the data comes from and data sources.