Dewar Lake
Cumberland, Nova Scotia124 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
Dewar Lake in Cumberland, 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: 3.7 m visibility. Maximum depth: 39.4 ft. Surface area: 306.9 acres.
- Clarity
- 3.7 m
- Max depth
- 12 m
- Area
- 124 ha
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Why Dewar 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 Dewar 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.
Dewar Lake is a 307-acre lake in Cumberland County, Nova Scotia with a maximum depth of 39 feet (16-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1973-07-04. Grade methodology: LakeQuality methodology.
What Dewar Lake is good for
From access and monitoring records, not editorial picks.
- Clear water12 ft of visibility
- 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 Dewar Lake
These are the measurements NSECC publishes for Dewar Lake. No A–F letter applies here: see why.
Good clarity, visible to about 12 ft. TSI 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.66 m | Measured, not scored |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 12 m |
| Average Depth | 4.8 m |
| Surface Area | 124 ha |
Fishing Dewar Lake
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Frequently asked questions about Dewar Lake
Where is Dewar Lake?
- Dewar Lake is a lake in Cumberland, 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 Dewar Lake?
- Dewar Lake in Cumberland, 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: 3.7 m visibility. Maximum depth: 39.4 ft. Surface area: 306.9 acres.
Is Dewar Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Dewar Lake?
- Dewar Lake has a maximum depth of 39.4 feet and an average depth of 15.7 feet. The lake covers 306.9 acres.
Explore Dewar Lake across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 1973. 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 · 1973
Monitoring station identifiers (1)
55
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.