Lac de Joux
Lac de Joux in Vaud, Switzerland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.2 m visibility.
- Clarity
- 3.2 m
Why Lac de Joux has no A–F grade
Lac de Joux in Switzerland is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: Eawag (the Swiss Federal Institute of Aquatic Science and Technology) and cantonal lake-monitoring programmes.
Lac de Joux is a lake in Vaud County, Switzerland.
Source: Eawag (the Swiss Federal Institute of Aquatic Science and Technology) and cantonal lake-monitoring programmes — not the EPA Water Quality Portal, last sampled 2023-11-29. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lac de Joux
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 10.5 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.2 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lac de Joux
Compare lakeside cabins, hotels, and vacation rentals near Lac de Joux in Vaud, Switzerland — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Lac de Joux
Frequently asked questions about Lac de Joux
What is the water quality of Lac de Joux?
- Lac de Joux in Vaud, Switzerland has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.2 m visibility.
Is Lac de Joux safe to swim in?
- Lac de Joux 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
905 measurements from 1 monitoring station, 2016–2023. Retrieved from the listed programme (not the EPA Water Quality Portal). See data sources on 2026-08-20.
Collected and reported by
- Eawag
eawag-ch905 samples · —
Analytical methods
- Eawag long-term Swiss lake monitoring
Monitoring station identifiers (1)
LakeJoux
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.