Grand Lake
Halifax, Nova Scotia300 haView mapDirections
NSECC publishes the water-quality measurements for Grand Lake. Here is what has been measured.
- 46 ft max depth
- Limited data
Grand Lake in Halifax, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 2.1 m visibility. Phosphorus: 4.5 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 45.9 ft. Surface area: 740.1 acres.
Grand Lake is a 740-acre lake in Halifax County, Nova Scotia with a maximum depth of 46 feet (5-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 2002-11-12. Methodology: how these readings are compared.
What Grand Lake is good for
From access and monitoring records, not editorial picks.
- Deep water45.9 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 Grand 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 Grand Lake
These are the measurements NSECC publishes for Grand 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 ft. Phosphorus 4.5 µg/L. Chlorophyll-a 1 µg/L. TSI 35.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.13m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 4.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 1µg/L | Measured, not scored 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 Grand Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
14 m
Average depth
1.5 m
Surface area
300 ha
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Frequently asked questions about Grand Lake
Where is Grand Lake?
- Grand Lake is a lake in Halifax, Nova Scotia. Its water-quality measurements are published by NSECC and shown on this page as reported.
What is the water quality of Grand Lake?
- Grand Lake in Halifax, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 2.1 m visibility. Phosphorus: 4.5 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 45.9 ft. Surface area: 740.1 acres.
Is Grand Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Grand Lake?
- Grand Lake has a maximum depth of 45.9 feet and an average depth of 4.9 feet. The lake covers 740.1 acres.
Explore Grand Lake across LakeQuality
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Where this data comes from
6 measurements from 3 monitoring stations, 1973–2002. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Lands and Forests
Lands and Forests3 samples · 1973–1979 - NS Dept. of Fisheries
NS Dept. of Fisheries1 sample · 2002 - Nova Scotia Environment and Climate Change
Nova Scotia Environment and Climate Change1 sample · 1984
Monitoring station identifiers (3)
52941940
Canadian lakes are published with the measurements their provincial programme reports. See where the data comes from and data sources.