Lake St Clair
NSW, AustraliaView mapDirections
CSIRO publishes the water-quality measurements for Lake St Clair. Here is what has been measured.
- Limited data
Lake St Clair in NSW, Australia has official water-quality measurements, shown as reported. Water clarity: 4.8 m visibility. Chlorophyll-a (algae): 2.3 µg/L.
How Lake St Clair is classified
Lake St Clair in Australia is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: CSIRO (Commonwealth Scientific and Industrial Research Organisation).
Lake St Clair is a lake in NSW County, Australia.
Source: CSIRO (Commonwealth Scientific and Industrial Research Organisation) — not the EPA Water Quality Portal, last sampled 2016-03-03. Methodology: how these readings are compared.
What Lake St Clair is good for
From access and monitoring records, not editorial picks.
- Clear water15.6 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake St Clair is safe to swim in today is a call for CSIRO (Commonwealth Scientific and Industrial Research Organisation) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake St Clair
These are the measurements CSIRO publishes for Lake St Clair. More on the source.
Crystal clear, you can see 15.6 ft down. Chlorophyll-a 2.3 µg/L. TSI 38.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.75m | 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) | 2.3µg/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. | 38 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lake St Clair
Answers come straight from the public measurements and survey records on this page.
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Fishing Lake St Clair
Frequently asked questions about Lake St Clair
Where is Lake St Clair?
- Lake St Clair is a lake in NSW, Australia. This page reports official water-quality measurements, shown as reported.
What is the water quality of Lake St Clair?
- Lake St Clair in NSW, Australia has official water-quality measurements, shown as reported. Water clarity: 4.8 m visibility. Chlorophyll-a (algae): 2.3 µg/L.
Is Lake St Clair safe to swim in?
- Lake St Clair has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.
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Where this data comes from
14 measurements from 7 monitoring stations, 2016. Retrieved from CSIRO inland waters bio-optical sampling (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- CSIRO
csiro-inland-biooptical14 samples · 2016
Analytical methods
- CSIRO inland waters bio-optical (surface HPLC chlorophyll-a, Secchi)
Monitoring station identifiers (7)
LS_01LS_02LS_03LS_04LS_05LS_06LS_07
Authority classifications are shown as the authority published them. See where the data comes from and data sources.