Louse Lake
Guysborough, Nova Scotia3 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.
- 7 ft max depth
- Limited data
Louse 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: 0.6 m visibility. Phosphorus: 10 µg/L. Maximum depth: 6.6 ft. Surface area: 7.4 acres.
- Clarity
- 0.6 m
- Max depth
- 2 m
- Area
- 3 ha
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Why Louse 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 Louse 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.
Louse Lake is a 7-acre lake in Guysborough County, Nova Scotia with a maximum depth of 7 feet (3-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1981-07-15. 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 Louse Lake
These are the measurements NSECC publishes for Louse Lake. No A–F letter applies here: see why.
Very murky, less than 2 ft of visibility. Phosphorus 10 µg/L. TSI 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.6 m | Measured, not scored |
| Phosphorus | 10 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 2 m |
| Average Depth | 1 m |
| Surface Area | 3 ha |
Fishing Louse Lake
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Frequently asked questions about Louse Lake
Where is Louse Lake?
- Louse 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 Louse Lake?
- Louse 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: 0.6 m visibility. Phosphorus: 10 µg/L. Maximum depth: 6.6 ft. Surface area: 7.4 acres.
Is Louse Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Louse Lake?
- Louse Lake has a maximum depth of 6.6 feet and an average depth of 3.3 feet. The lake covers 7.4 acres.
Explore Louse Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 1981. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Lands and Forests, NSDOE
Lands and Forests, NSDOE1 sample · 1981
Monitoring station identifiers (1)
149
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.