Thomas Lake
Halifax, Nova ScotiaView 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.
- Limited data
Thomas 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: 4.3 m visibility. Phosphorus: 3 µg/L. Chlorophyll-a (algae): 0.6 µg/L.
- Clarity
- 4.3 m
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Why Thomas 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 Thomas 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.
Thomas Lake is a lake in Halifax County, Nova Scotia.
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 2007-10-03. Grade methodology: LakeQuality methodology.
What Thomas Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13.9 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Thomas Lake
These are the measurements NSECC publishes for Thomas Lake. No A–F letter applies here: see why.
Good clarity, visible to about 13.9 ft. Phosphorus 3 µg/L. Chlorophyll-a 0.6 µg/L. TSI 28.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.25 m | Measured, not scored |
| Phosphorus | 3 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 0.6 µg/L | Measured, not scored |
| Trophic State Index (TSI) | 28 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Fishing Thomas Lake
Nearby Lakes in Halifax
Frequently asked questions about Thomas Lake
Where is Thomas Lake?
- Thomas 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 Thomas Lake?
- Thomas 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: 4.3 m visibility. Phosphorus: 3 µg/L. Chlorophyll-a (algae): 0.6 µg/L.
Is Thomas Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Thomas Lake across LakeQuality
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Where this data comes from
9 measurements from 1 monitoring station, 1974–2007. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Nova Scotia Environment and Climate Change
Nova Scotia Environment and Climate Change2 samples · 1984 - NSDFA
NSDFA1 sample · 2007 - Lands and Forests, NSDOE
Lands and Forests, NSDOE1 sample · 1984 - DOE
DOE1 sample · 1983 - Environment Canada- Shubenacadie Headwaters Enviro
Environment Canada- Shubenacadie Headwaters Enviro1 sample · 1974
Monitoring station identifiers (1)
865
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.