Retenue du Pont du Roi
Retenue du Pont du Roi in Saône-et-Loire, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.8 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 5.5 µg/L.
- Clarity
- 2.8 m
Why Retenue du Pont du Roi has no A–F grade
Retenue du Pont du Roi in France 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, 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: the French water agencies, via UNEP GEMS/Water.
Retenue du Pont du Roi is a lake in Saône-et-Loire County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2023-10-24. 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 Retenue du Pont du Roi
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 9.2 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 5.5 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 m | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 5.5 µg/L | Not graded |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Retenue du Pont du Roi
Compare lakeside cabins, hotels, and vacation rentals near Retenue du Pont du Roi in Saône-et-Loire, France — 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 Retenue du Pont du Roi
Frequently asked questions about Retenue du Pont du Roi
What is the water quality of Retenue du Pont du Roi?
- Retenue du Pont du Roi in Saône-et-Loire, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.8 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 5.5 µg/L.
Is Retenue du Pont du Roi safe to swim in?
- Retenue du Pont du Roi 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
24 measurements from 1 monitoring station, 2020–2023. 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-fr24 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
K123530
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.