Big Brook Lake
Guysborough, Nova ScotiaView mapDirections
NSECC publishes the water-quality measurements for Big Brook Lake. Here is what has been measured.
- Limited data
Big Brook Lake in Guysborough, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
Big Brook Lake is a lake in Guysborough County, Nova Scotia.
Source: Nova Scotia Environment and Climate Change — not the EPA Water Quality Portal, last sampled 1996-07-30. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Big Brook 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.
Water quality measurements for Big Brook Lake
These are the measurements NSECC publishes for Big Brook Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 7 µg/L. Chlorophyll-a 2.4 µg/L. TSI 36.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 7µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2.4µg/L | Measured, not scored 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. | 36 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
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Frequently asked questions about Big Brook Lake
Where is Big Brook Lake?
- Big Brook 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 Big Brook Lake?
- Big Brook Lake in Guysborough, Nova Scotia has water-quality measurements published by NSECC, shown here as reported. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
Is Big Brook Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
2 measurements from 1 monitoring station, 1996. Retrieved from Nova Scotia open data (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- NS Dept. of Fisheries
NS Dept. of Fisheries1 sample · 1996
Monitoring station identifiers (1)
232
Canadian lakes are published with the measurements their provincial programme reports. See where the data comes from and data sources.