Rocky Brook Lake
Halifax, Nova Scotia64 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.
- 39 ft max depth
- Limited data
Rocky Brook 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: 2.8 m visibility. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 1.5 µg/L. Maximum depth: 39.4 ft. Surface area: 159 acres.
- Clarity
- 2.8 m
- Max depth
- 12 m
- Area
- 64 ha
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Why Rocky Brook 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 Rocky Brook 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.
Rocky Brook Lake is a 159-acre lake in Halifax County, Nova Scotia with a maximum depth of 39 feet (9-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 2003-08-07. Grade methodology: LakeQuality methodology.
What Rocky Brook Lake is good for
From access and monitoring records, not editorial picks.
- Deep water39.4 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 Rocky Brook Lake
These are the measurements NSECC publishes for Rocky Brook Lake. No A–F letter applies here: see why.
Moderate clarity, visible to about 9 ft. Phosphorus 8 µg/L. Chlorophyll-a 1.5 µg/L. TSI 38.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.75 m | Measured, not scored |
| Phosphorus | 8 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 1.5 µg/L | Measured, not scored |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 12 m |
| Average Depth | 2.7 m |
| Surface Area | 64 ha |
Fishing Rocky Brook Lake
Nearby Lakes in Halifax
Frequently asked questions about Rocky Brook Lake
Where is Rocky Brook Lake?
- Rocky Brook 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 Rocky Brook Lake?
- Rocky Brook 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: 2.8 m visibility. Phosphorus: 8 µg/L. Chlorophyll-a (algae): 1.5 µg/L. Maximum depth: 39.4 ft. Surface area: 159 acres.
Is Rocky Brook Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Rocky Brook Lake?
- Rocky Brook Lake has a maximum depth of 39.4 feet and an average depth of 9 feet. The lake covers 159 acres.
Explore Rocky Brook Lake across LakeQuality
More lakes in Nova Scotia
Other Lakes in Nova Scotia
Oligotrophic Lakes in Nova Scotia
Where this data comes from
3 measurements from 1 monitoring station, 2003. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- NSDAF
NSDAF1 sample · 2003
Monitoring station identifiers (1)
230
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.