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LakeQuality

Black Rattle Lake

Queens, Nova Scotia83 haView mapDirections

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

Clarity
7 m
Clearer than most
Secchi · sampled 1982
Phosphorus
0.5 µg/L
Less phosphorus than most
Measured by NSECC
Max depth
23 m
Bathymetric survey
Area
83 ha
Surface area
  • 76 ft max depth
  • Limited data

Black Rattle Lake in Queens, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 7 m visibility. Phosphorus: 0.5 µg/L. Maximum depth: 75.5 ft. Surface area: 205.1 acres.

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Black Rattle Lake is a 205-acre lake in Queens County, Nova Scotia with a maximum depth of 76 feet (21-foot average).

Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1982-08-26. Methodology: how these readings are compared.

What Black Rattle Lake is good for

From access and monitoring records, not editorial picks.

  • Clear water23 ft of visibility
  • Deep water75.5 ft surveyed max depth

Swimming conditions

No reading

Limited data

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

Whether Black Rattle 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 Black Rattle Lake

These are the measurements NSECC publishes for Black Rattle 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 23 ft down. Phosphorus 0.5 µg/L. TSI 13.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)7mMeasured, not scored

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

Total phosphorus0.5µg/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.13Oligotrophic
OligotrophicMesotrophicEutrophicHypereutrophic

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

Ask about Black Rattle Lake

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

Lake Details

Max depth

23 m

Average depth

6.5 m

Surface area

83 ha

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Stays near Black Rattle Lake

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Fishing Black Rattle Lake

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Frequently asked questions about Black Rattle Lake

Where is Black Rattle Lake?

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

What is the water quality of Black Rattle Lake?

Black Rattle Lake in Queens, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 7 m visibility. Phosphorus: 0.5 µg/L. Maximum depth: 75.5 ft. Surface area: 205.1 acres.

Measurements on this page ↑

Is Black Rattle 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 Black Rattle Lake?

Black Rattle Lake has a maximum depth of 75.5 feet and an average depth of 21.3 feet. The lake covers 205.1 acres.

Oligotrophic Lakes in Nova Scotia

Where this data comes from

2 measurements from 1 monitoring station, 1982. 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 · 1982
Monitoring station identifiers (1)
  • 105

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