Lac de Verdon
Maine-et-Loire, FranceView mapDirections
Eau France publishes the water-quality measurements for Lac de Verdon. Here is what has been measured.
- Limited data
Lac de Verdon in Maine-et-Loire, France has official water-quality measurements, shown as reported. Water clarity: 0.7 m visibility. Phosphorus: 75 µg/L. Chlorophyll-a (algae): 13 µg/L.
How Lac de Verdon is classified
Lac de Verdon 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 water clarity, phosphorus 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.
Lac de Verdon is a lake in Maine-et-Loire County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2019-10-28. 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 Lac de Verdon 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 Lac de Verdon
These are the measurements Eau France publishes for Lac de Verdon. More on the source.
Very murky, less than 2.3 ft of visibility. Phosphorus 75 µg/L. Chlorophyll-a 13 µg/L. TSI 62.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.7m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 75µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 13µg/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. | 62 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Lac de Verdon
Where is Lac de Verdon?
- Lac de Verdon is a lake in Maine-et-Loire, France. This page reports official water-quality measurements, shown as reported.
What is the water quality of Lac de Verdon?
- Lac de Verdon in Maine-et-Loire, France has official water-quality measurements, shown as reported. Water clarity: 0.7 m visibility. Phosphorus: 75 µg/L. Chlorophyll-a (algae): 13 µg/L.
Is Lac de Verdon safe to swim in?
- Lac de Verdon 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
373 measurements from 1 monitoring station, 2016–2019. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-20.
Collected and reported by
- Office français de la biodiversité (Hub'Eau)
hubeau-fr373 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
M720510
Authority classifications are shown as the authority published them. See where the data comes from and data sources.