Big Molly Upsim Lake
Annapolis, Nova Scotia507 haView mapDirections
No A–F letter for this lake. The letter is scored against EPA reference conditions for a lake’s ecoregion, and those stop at the US border. Here is what has been measured.
- 34 ft max depth
- Limited data
Big Molly Upsim Lake in Annapolis, Nova Scotia has water-quality measurements published by NSECC and no A–F letter. The letter's EPA reference conditions stop at the US border. Water clarity: 1.8 m visibility. Maximum depth: 34.4 ft. Surface area: 1253.6 acres.
- Clarity
- 1.8 m
- Max depth
- 10.5 m
- Area
- 507 ha
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Why Big Molly Upsim Lake has no A–F letter
The LakeQuality letter is scored against EPA National Lakes Assessment reference conditions for a lake’s ecoregion, and those stop at the US border. There is no reference condition for Nova Scotia, so the scale cannot be applied to Big Molly Upsim Lake at any level of sampling. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
This is not a gap in the monitoring record. NSECC publishes these measurements directly, and everything below that has been measured is reported on this page as NSECC reports it.
Monitoring: Nova Scotia Environment and Climate Change. Read the full grading methodology.
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. Grade methodology: LakeQuality methodology.
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 Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Big Molly Upsim Lake
These are the measurements NSECC publishes for Big Molly Upsim Lake. No A–F letter applies here: see why.
Murky, only visible to about 5.9 ft. TSI 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.8 m | Measured, not scored |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 10.5 m |
| Average Depth | 2.6 m |
| Surface Area | 507 ha |
Fishing Big Molly Upsim Lake
Nearby Lakes in Annapolis
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 it carries no A–F letter, because no reference condition exists for lakes in this region, so the assessment thresholds behind the A–F scale cannot be applied here.
What is the water quality grade for Big Molly Upsim Lake?
- Big Molly Upsim Lake in Annapolis, Nova Scotia has water-quality measurements published by NSECC and no A–F letter. The letter's EPA reference conditions stop at the US border. Water clarity: 1.8 m visibility. Maximum depth: 34.4 ft. Surface area: 1253.6 acres.
Is Big Molly Upsim Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
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.
Explore Big Molly Upsim Lake across LakeQuality
More lakes in Nova Scotia
Other Lakes in Nova Scotia
Eutrophic Lakes in Nova Scotia
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 Forests
Lands and Forests1 sample · 1975
Monitoring station identifiers (1)
988
Canadian lakes are published with the measurements their provincial programme reports, and without a LakeQuality A–F letter. The letter is scored against EPA reference conditions for a lake’s ecoregion, and the EPA does not survey these lakes. See how grades are calculated and data sources.