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LakeQuality

Cornwall Lake

Lunenburg, Nova Scotia14 haView mapDirections

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

Clarity
4.3 m
Clearer than most
Secchi · sampled 1980
Max depth
5 m
Bathymetric survey
Area
14 ha
Surface area
  • 16 ft max depth
  • Limited data

Cornwall Lake in Lunenburg, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4.3 m visibility. Maximum depth: 16.4 ft. Surface area: 35.8 acres.

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Cornwall Lake is a 36-acre lake in Lunenburg County, Nova Scotia with a maximum depth of 16 feet (8-foot average).

Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1980-08-19. Methodology: how these readings are compared.

What Cornwall Lake is good for

From access and monitoring records, not editorial picks.

  • Clear water14.1 ft of visibility

Swimming conditions

No reading

Limited data

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

Whether Cornwall 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 Cornwall Lake

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

Good clarity, visible to about 14.1 ft. TSI 39.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)4.3mMeasured, not scored

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

Total phosphorusNo reading

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.39Oligotrophic
OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

Ask about Cornwall Lake

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

Lake Details

Max depth

5 m

Average depth

2.5 m

Surface area

14 ha

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Stays near Cornwall Lake

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Fishing Cornwall Lake

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Frequently asked questions about Cornwall Lake

Where is Cornwall Lake?

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

What is the water quality of Cornwall Lake?

Cornwall Lake in Lunenburg, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4.3 m visibility. Maximum depth: 16.4 ft. Surface area: 35.8 acres.

Measurements on this page ↑

Is Cornwall 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 Cornwall Lake?

Cornwall Lake has a maximum depth of 16.4 feet and an average depth of 8.2 feet. The lake covers 35.8 acres.

Where this data comes from

1 measurement from 1 monitoring station, 1980. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

  • Lands and ForestsLands and Forests1 sample · 1980
Monitoring station identifiers (1)
  • 146

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