Gibraltar Lake
Halifax, Nova Scotia78 haView mapDirections
No A–F letter for this lake. The letter is scored against EPA reference conditions for a lake’s ecoregion, and those stop at the US border. Here is what has been measured.
- 53 ft max depth
- Limited data
Gibraltar Lake in Halifax, Nova Scotia has water-quality measurements published by NSECC and no A–F letter. The letter's EPA reference conditions stop at the US border. Water clarity: 4.8 m visibility. Phosphorus: 0.5 µg/L. Chlorophyll-a (algae): 0.9 µg/L. Maximum depth: 52.5 ft. Surface area: 193.7 acres.
- Clarity
- 4.8 m
- Max depth
- 16 m
- Area
- 78 ha
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Why Gibraltar Lake has no A–F letter
The LakeQuality letter is scored against EPA National Lakes Assessment reference conditions for a lake’s ecoregion, and those stop at the US border. There is no reference condition for Nova Scotia, so the scale cannot be applied to Gibraltar Lake at any level of sampling. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
This is not a gap in the monitoring record. NSECC publishes these measurements directly, and everything below that has been measured is reported on this page as NSECC reports it.
Monitoring: Nova Scotia Environment and Climate Change. Read the full grading methodology.
Gibraltar Lake is a 194-acre lake in Halifax County, Nova Scotia with a maximum depth of 53 feet (13-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1999-08-10. Grade methodology: LakeQuality methodology.
What Gibraltar Lake is good for
From access and monitoring records, not editorial picks.
- Clear water15.6 ft of visibility
- Deep water52.5 ft surveyed max depth
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Gibraltar Lake
These are the measurements NSECC publishes for Gibraltar Lake. No A–F letter applies here: see why.
Crystal clear, you can see 15.6 ft down. Phosphorus 0.5 µg/L. Chlorophyll-a 0.9 µg/L. TSI 20.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.75 m | Measured, not scored |
| Phosphorus | 0.5 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 0.9 µg/L | Measured, not scored |
| Trophic State Index (TSI) | 20 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 16 m |
| Average Depth | 3.8 m |
| Surface Area | 78 ha |
Fishing Gibraltar Lake
Nearby Lakes in Halifax
Frequently asked questions about Gibraltar Lake
Where is Gibraltar Lake?
- Gibraltar Lake is a lake in Halifax, Nova Scotia. Its water-quality measurements are published by NSECC, and it carries no A–F letter, because no reference condition exists for lakes in this region, so the assessment thresholds behind the A–F scale cannot be applied here.
What is the water quality grade for Gibraltar Lake?
- Gibraltar Lake in Halifax, Nova Scotia has water-quality measurements published by NSECC and no A–F letter. The letter's EPA reference conditions stop at the US border. Water clarity: 4.8 m visibility. Phosphorus: 0.5 µg/L. Chlorophyll-a (algae): 0.9 µg/L. Maximum depth: 52.5 ft. Surface area: 193.7 acres.
Is Gibraltar Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Gibraltar Lake?
- Gibraltar Lake has a maximum depth of 52.5 feet and an average depth of 12.5 feet. The lake covers 193.7 acres.
Explore Gibraltar Lake across LakeQuality
More lakes in Nova Scotia
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Where this data comes from
3 measurements from 1 monitoring station, 1999. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- NS Dept. of Fisheries
NS Dept. of Fisheries1 sample · 1999
Monitoring station identifiers (1)
209
Canadian lakes are published with the measurements their provincial programme reports, and without a LakeQuality A–F letter. The letter is scored against EPA reference conditions for a lake’s ecoregion, and the EPA does not survey these lakes. See how grades are calculated and data sources.