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Big Tom Wallace Lake

Digby, Nova Scotia185 haView mapDirections

NSECC publishes the water-quality measurements for Big Tom Wallace Lake. Here is what has been measured.

Clarity
1 m
Murkier than most
Secchi · sampled 1986
Phosphorus
4 µg/L
Typical for Nova Scotia
Measured by NSECC
Max depth
5 m
Bathymetric survey
Area
185 ha
Surface area
  • 16 ft max depth
  • Limited data

Big Tom Wallace Lake in Digby, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 1 m visibility. Phosphorus: 4 µg/L. Maximum depth: 16.4 ft. Surface area: 457.6 acres.

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Big Tom Wallace Lake is a 458-acre lake in Digby County, Nova Scotia with a maximum depth of 16 feet (3-foot average).

Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1986-07-05. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Big Tom Wallace Lake is safe to swim in today is a call for Nova Scotia Environment and Climate Change and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Big Tom Wallace Lake

These are the measurements NSECC publishes for Big Tom Wallace Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

Very murky, less than 3.3 ft of visibility. Phosphorus 4 µg/L. TSI 42.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)1mMeasured, not scored

How deep a black-and-white disk stays visible from the surface. Higher is clearer.

Total phosphorus4µg/LMeasured, not scored

The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.

Chlorophyll-a (algae)No reading

The green pigment in algae — a direct measure of how much algae is in the water.

Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.42Mesotrophic
OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Big Tom Wallace Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

5 m

Average depth

1 m

Surface area

185 ha

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Frequently asked questions about Big Tom Wallace Lake

Where is Big Tom Wallace Lake?

Big Tom Wallace Lake is a lake in Digby, Nova Scotia. Its water-quality measurements are published by NSECC and shown on this page as reported.

What is the water quality of Big Tom Wallace Lake?

Big Tom Wallace Lake in Digby, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 1 m visibility. Phosphorus: 4 µg/L. Maximum depth: 16.4 ft. Surface area: 457.6 acres.

Measurements on this page ↑

Is Big Tom Wallace Lake safe to swim in?

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Swimming on this page ↑

How deep is Big Tom Wallace Lake?

Big Tom Wallace Lake has a maximum depth of 16.4 feet and an average depth of 3.3 feet. The lake covers 457.6 acres.

Mesotrophic Lakes in Nova Scotia

Where this data comes from

2 measurements from 1 monitoring station, 1986. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

  • Lands and Forests, NSDOELands and Forests, NSDOE1 sample · 1986
Monitoring station identifiers (1)
  • 986

Canadian lakes are published with the measurements their provincial programme reports. See where the data comes from and data sources.