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LakeQuality

Gillfillan Lake

Yarmouth, Nova Scotia176 haView mapDirections

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

Clarity
1.5 m
Murkier than most
Secchi · sampled 1992
Phosphorus
6 µg/L
Typical for Nova Scotia
Measured by NSECC
Max depth
12 m
Bathymetric survey
Area
176 ha
Surface area
  • 39 ft max depth
  • Limited data

Gillfillan Lake in Yarmouth, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 1.5 m visibility. Phosphorus: 6 µg/L. Maximum depth: 39.4 ft. Surface area: 434.4 acres.

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Gillfillan Lake is a 434-acre lake in Yarmouth County, Nova Scotia with a maximum depth of 39 feet (8-foot average).

Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1992-08-18. Methodology: how these readings are compared.

What Gillfillan Lake is good for

From access and monitoring records, not editorial picks.

  • Deep water39.4 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 Gillfillan 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 Gillfillan Lake

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

Murky, only visible to about 4.9 ft. Phosphorus 6 µg/L. TSI 42.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)1.5mMeasured, not scored

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

Total phosphorus6µg/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 Gillfillan Lake

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

Lake Details

Max depth

12 m

Average depth

2.3 m

Surface area

176 ha

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Fishing Gillfillan Lake

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Frequently asked questions about Gillfillan Lake

Where is Gillfillan Lake?

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

What is the water quality of Gillfillan Lake?

Gillfillan Lake in Yarmouth, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 1.5 m visibility. Phosphorus: 6 µg/L. Maximum depth: 39.4 ft. Surface area: 434.4 acres.

Measurements on this page ↑

Is Gillfillan 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 Gillfillan Lake?

Gillfillan Lake has a maximum depth of 39.4 feet and an average depth of 7.5 feet. The lake covers 434.4 acres.

Where this data comes from

3 measurements from 1 monitoring station, 1985–1992. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.

Collected and reported by

  • NS Dept. of FisheriesNS Dept. of Fisheries1 sample · 1992
  • Lands and Forests, NSDOELands and Forests, NSDOE1 sample · 1985
Monitoring station identifiers (1)
  • 978

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