Where is Long John Lake?

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

How deep is Long John Lake?

Long John Lake has a maximum depth of 39.4 feet and an average depth of 11.2 feet. The lake covers 44 acres.

Long John Lake

Guysborough, Nova Scotia18 haView map Directions

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

Clarity

4 m

Clearer than most

Secchi · sampled 1978

Max depth

12 m

Bathymetric survey

Area

18 ha

Surface area

39 ft max depth
Limited data

See the measurements Directions Where to stay

Long John Lake in Guysborough, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4 m visibility. Maximum depth: 39.4 ft. Surface area: 44 acres.

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Long John Lake is a 44-acre lake in Guysborough County, Nova Scotia with a maximum depth of 39 feet (11-foot average).

Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1978-07-19. Methodology: how these readings are compared.

What Long John Lake is good for

From access and monitoring records, not editorial picks.

Clear water13.1 ft of visibility
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 Long John 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 Long John Lake

These are the measurements NSECC publishes for Long John 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 13.1 ft. TSI 40.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	4m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus		No 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.	40	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Long John Lake

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

Lake Details

Max depth

12 m

Average depth

3.4 m

Surface area

18 ha

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Stays near Long John Lake

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Fishing Long John Lake

→ Long John Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Guysborough

Caribou Lake2 m clear1 miView →Second Rocky Lake2.7 m clear2.2 miView →Rush Lake2.4 m clear5.7 miView →Long Lake—View →Big Brook Lake—View →Round Lake4.3 m clear—View →

Frequently asked questions about Long John Lake

Where is Long John Lake?: Long John Lake is a lake in Guysborough, Nova Scotia. Its water-quality measurements are published by NSECC and shown on this page as reported.
What is the water quality of Long John Lake?: Long John Lake in Guysborough, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 4 m visibility. Maximum depth: 39.4 ft. Surface area: 44 acres.
Is Long John Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Long John Lake?: Long John Lake has a maximum depth of 39.4 feet and an average depth of 11.2 feet. The lake covers 44 acres.