Chisholms Lake
Guysborough, Nova Scotia16 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.
- 10 ft max depth
- Limited data
Chisholms Lake in Guysborough, 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: 1.4 m visibility. Phosphorus: 25 µg/L. Maximum depth: 9.8 ft. Surface area: 38.9 acres.
- Clarity
- 1.4 m
- Max depth
- 3 m
- Area
- 16 ha
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Why Chisholms 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 Chisholms Lake at any level of sampling. Sampling here has recorded water clarity and phosphorus, but not 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.
Chisholms Lake is a 39-acre lake in Guysborough County, Nova Scotia with a maximum depth of 10 feet (4-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 2004-08-17. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Chisholms Lake
These are the measurements NSECC publishes for Chisholms Lake. No A–F letter applies here: see why.
Murky, only visible to about 4.4 ft. Phosphorus 25 µg/L. TSI 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.35 m | Measured, not scored |
| Phosphorus | 25 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 3 m |
| Average Depth | 1.3 m |
| Surface Area | 16 ha |
Fishing Chisholms Lake
Nearby Lakes in Guysborough
Frequently asked questions about Chisholms Lake
Where is Chisholms Lake?
- Chisholms Lake is a lake in Guysborough, 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 Chisholms Lake?
- Chisholms Lake in Guysborough, 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: 1.4 m visibility. Phosphorus: 25 µg/L. Maximum depth: 9.8 ft. Surface area: 38.9 acres.
Is Chisholms Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Chisholms Lake?
- Chisholms Lake has a maximum depth of 9.8 feet and an average depth of 4.4 feet. The lake covers 38.9 acres.
Explore Chisholms Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2001–2004. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- NSDAF
NSDAF2 samples · 2001–2004
Monitoring station identifiers (1)
222
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.