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LakeQuality

Poison Lake

Cumberland, Nova Scotia3 haView mapDirections

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

Clarity
4.6 m
Clearer than most
Secchi · sampled 1973
Max depth
4.6 m
Bathymetric survey
Area
3 ha
Surface area
  • 15 ft max depth
  • Limited data

Poison Lake in Cumberland, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4.6 m visibility. Maximum depth: 15.1 ft. Surface area: 7.9 acres.

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Poison Lake is a 8-acre lake in Cumberland County, Nova Scotia with a maximum depth of 15 feet (8-foot average).

Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1973-08-08. Methodology: how these readings are compared.

What Poison Lake is good for

From access and monitoring records, not editorial picks.

  • Clear water15.1 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 Poison 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 Poison Lake

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

Crystal clear, you can see 15.1 ft down. TSI 38.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)4.6mMeasured, 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.38Oligotrophic
OligotrophicMesotrophicEutrophicHypereutrophic

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

Ask about Poison Lake

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

Lake Details

Max depth

4.6 m

Average depth

2.4 m

Surface area

3 ha

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Fishing Poison Lake

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Frequently asked questions about Poison Lake

Where is Poison Lake?

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

What is the water quality of Poison Lake?

Poison Lake in Cumberland, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4.6 m visibility. Maximum depth: 15.1 ft. Surface area: 7.9 acres.

Measurements on this page ↑

Is Poison 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 Poison Lake?

Poison Lake has a maximum depth of 15.1 feet and an average depth of 7.9 feet. The lake covers 7.9 acres.

Oligotrophic Lakes in Nova Scotia

Where this data comes from

1 measurement from 1 monitoring station, 1973. 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 · 1973
Monitoring station identifiers (1)
  • 58

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