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Big Molly Upsim Lake

Annapolis, Nova Scotia507 haView mapDirections

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

Clarity
1.8 m
Typical for Nova Scotia
Secchi · sampled 1975
Max depth
10.5 m
Bathymetric survey
Area
507 ha
Surface area
  • 34 ft max depth
  • Limited data

Big Molly Upsim Lake in Annapolis, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 1.8 m visibility. Maximum depth: 34.4 ft. Surface area: 1253.6 acres.

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Big Molly Upsim Lake is a 1,254-acre lake in Annapolis County, Nova Scotia with a maximum depth of 34 feet (9-foot average).

Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1975-07-07. Methodology: how these readings are compared.

What Big Molly Upsim Lake is good for

From access and monitoring records, not editorial picks.

  • Deep water34.4 ft surveyed max depth
  • Big water1,254 acres

Swimming conditions

No reading

Limited data

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

Whether Big Molly Upsim 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 Big Molly Upsim Lake

These are the measurements NSECC publishes for Big Molly Upsim 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 5.9 ft. TSI 52.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)1.8mMeasured, 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.52Eutrophic
OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Big Molly Upsim Lake

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

Lake Details

Max depth

10.5 m

Average depth

2.6 m

Surface area

507 ha

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Fishing Big Molly Upsim Lake

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Frequently asked questions about Big Molly Upsim Lake

Where is Big Molly Upsim Lake?

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

What is the water quality of Big Molly Upsim Lake?

Big Molly Upsim Lake in Annapolis, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Water clarity: 1.8 m visibility. Maximum depth: 34.4 ft. Surface area: 1253.6 acres.

Measurements on this page ↑

Is Big Molly Upsim 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 Big Molly Upsim Lake?

Big Molly Upsim Lake has a maximum depth of 34.4 feet and an average depth of 8.5 feet. The lake covers 1253.6 acres.

Where this data comes from

1 measurement from 1 monitoring station, 1975. 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 · 1975
Monitoring station identifiers (1)
  • 988

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