Tom Lake
Guysborough, Nova Scotia66 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.
- 40 ft max depth
- Limited data
Tom 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: 1.1 m visibility. Maximum depth: 40.4 ft. Surface area: 163.3 acres.
- Clarity
- 1.1 m
- Max depth
- 12.3 m
- Area
- 66 ha
Stays via Stay22
Stays near Tom Lake
Compare lakeside cabins, hotels, and vacation rentals near Tom Lake in Guysborough, Nova Scotia — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Tom Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Tom Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Why Tom 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 Tom 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.
Tom Lake is a 163-acre lake in Guysborough County, Nova Scotia with a maximum depth of 40 feet (6-foot average).
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1983-10-11. Grade methodology: LakeQuality methodology.
What Tom Lake is good for
From access and monitoring records, not editorial picks.
- Deep water40.4 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 Tom Lake
These are the measurements NSECC publishes for Tom Lake. No A–F letter applies here: see why.
Murky, only visible to about 3.6 ft. TSI 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.11 m | Measured, not scored |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 12.3 m |
| Average Depth | 1.8 m |
| Surface Area | 66 ha |
Fishing Tom Lake
Nearby Lakes in Guysborough
Frequently asked questions about Tom Lake
Where is Tom Lake?
- Tom 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 Tom Lake?
- Tom 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: 1.1 m visibility. Maximum depth: 40.4 ft. Surface area: 163.3 acres.
Is Tom Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Tom Lake?
- Tom Lake has a maximum depth of 40.4 feet and an average depth of 5.9 feet. The lake covers 163.3 acres.
Explore Tom Lake across LakeQuality
More lakes in Nova Scotia
Other Lakes in Nova Scotia
Eutrophic Lakes in Nova Scotia
Where this data comes from
2 measurements from 1 monitoring station, 1953–1983. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- DOE
DOE2 samples · 1953–1983
Monitoring station identifiers (1)
56
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.