Cornwall Lake
Lunenburg, Nova Scotia14 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.
- 16 ft max depth
- Limited data
Cornwall Lake in Lunenburg, 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. Maximum depth: 16.4 ft. Surface area: 35.8 acres.
- Clarity
- 4.3 m
- Max depth
- 5 m
- Area
- 14 ha
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Why Cornwall 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 Cornwall Lake at any level of sampling. Sampling here has recorded water clarity, but not 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.
Cornwall Lake is a 36-acre lake in Lunenburg County, Nova Scotia with a maximum depth of 16 feet (8-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1980-08-19. Grade methodology: LakeQuality methodology.
What Cornwall Lake is good for
From access and monitoring records, not editorial picks.
- Clear water14.1 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 Cornwall Lake
These are the measurements NSECC publishes for Cornwall Lake. No A–F letter applies here: see why.
Good clarity, visible to about 14.1 ft. TSI 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.3 m | Measured, not scored |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 5 m |
| Average Depth | 2.5 m |
| Surface Area | 14 ha |
Fishing Cornwall Lake
Nearby Lakes in Lunenburg
Frequently asked questions about Cornwall Lake
Where is Cornwall Lake?
- Cornwall Lake is a lake in Lunenburg, 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 Cornwall Lake?
- Cornwall Lake in Lunenburg, 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. Maximum depth: 16.4 ft. Surface area: 35.8 acres.
Is Cornwall Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Cornwall Lake?
- Cornwall Lake has a maximum depth of 16.4 feet and an average depth of 8.2 feet. The lake covers 35.8 acres.
Explore Cornwall Lake across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 1980. 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 Forests1 sample · 1980
Monitoring station identifiers (1)
146
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.