Third Lake
Halifax, Nova Scotia83 haView mapDirections
NSECC publishes the water-quality measurements for Third Lake. Here is what has been measured.
- 80 ft max depth
- Limited data
Third Lake in Halifax, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4 m visibility. Phosphorus: 5.5 µg/L. Chlorophyll-a (algae): 1.4 µg/L. Maximum depth: 80.1 ft. Surface area: 204 acres.
Third Lake is a 204-acre lake in Halifax County, Nova Scotia with a maximum depth of 80 feet (28-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1990-11-14. Methodology: how these readings are compared.
What Third Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13.1 ft of visibility
- Deep water80.1 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 Third 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 Third Lake
These are the measurements NSECC publishes for Third 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 5.5 µg/L. Chlorophyll-a 1.4 µg/L. TSI 34.
| 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 | 5.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 1.4µg/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. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Third Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
24.4 m
Average depth
8.6 m
Surface area
83 ha
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Fishing Third Lake
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Frequently asked questions about Third Lake
Where is Third Lake?
- Third 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 Third Lake?
- Third Lake in Halifax, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4 m visibility. Phosphorus: 5.5 µg/L. Chlorophyll-a (algae): 1.4 µg/L. Maximum depth: 80.1 ft. Surface area: 204 acres.
Is Third Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Third Lake?
- Third Lake has a maximum depth of 80.1 feet and an average depth of 28.1 feet. The lake covers 204 acres.
Explore Third Lake across LakeQuality
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Where this data comes from
10 measurements from 2 monitoring stations, 1971–1990. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Soil and Water Conservation Society of Metro
Soil and Water Conservation Society of Metro3 samples · 1990 - Lands and Forests
Lands and Forests1 sample · 1973 - Submitting organization not recorded for these samples1 sample · 1971
Some records reached the portal without a submitting organization. Those samples are counted above but not attributed.
Monitoring station identifiers (2)
86642
Canadian lakes are published with the measurements their provincial programme reports. See where the data comes from and data sources.