Retenue de Sidiailles
Retenue de Sidiailles in Cher, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.6 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6.8 µg/L.
- Clarity
- 1.6 m
Why Retenue de Sidiailles has no A–F grade
Retenue de Sidiailles 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 de Sidiailles is a lake in Cher County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2025-09-22. 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 de Sidiailles
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 5.2 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 6.8 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 m | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 6.8 µg/L | Not graded |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Retenue de Sidiailles
Compare lakeside cabins, hotels, and vacation rentals near Retenue de Sidiailles in Cher, 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 de Sidiailles
Frequently asked questions about Retenue de Sidiailles
What is the water quality of Retenue de Sidiailles?
- Retenue de Sidiailles in Cher, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.6 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6.8 µg/L.
Is Retenue de Sidiailles safe to swim in?
- Retenue de Sidiailles 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
27 measurements from 1 monitoring station, 2020–2025. 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-fr27 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
K60-410
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.