Retenue de Villerest
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Eau France publishes the water-quality measurements for Retenue de Villerest. Here is what has been measured.
- Limited data
Retenue de Villerest in France has official water-quality measurements, shown as reported. Phosphorus: 89 µg/L.
How Retenue de Villerest is classified
Retenue de Villerest in France 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 phosphorus, but not water clarity and algae (chlorophyll-a).
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the French water agencies, via UNEP GEMS/Water.
Retenue de Villerest is a lake in Unknown County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2022-10-20. 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 Retenue de Villerest is safe to swim in today is a call for the French water agencies, via UNEP GEMS/Water and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Retenue de Villerest
These are the measurements Eau France publishes for Retenue de Villerest. More on the source.
No clarity data. Phosphorus 89 µg/L. TSI 69.
| 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 | 89µg/L | Measured, not scored 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. | 69 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Retenue de Villerest
Where is Retenue de Villerest?
- Retenue de Villerest is a lake in France. This page reports official water-quality measurements, shown as reported.
What is the water quality of Retenue de Villerest?
- Retenue de Villerest in France has official water-quality measurements, shown as reported. Phosphorus: 89 µg/L.
Is Retenue de Villerest safe to swim in?
- Retenue de Villerest 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
32 measurements from 1 monitoring station, 2019–2022. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- European Environment Agency
europeanenvironmentagenc32 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
FRA00077
Authority classifications are shown as the authority published them. See where the data comes from and data sources.