Retenue de L'Estrade
Retenue de L'Estrade in Aude, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.5 m visibility. Chlorophyll-a (algae): 1 µg/L.
- Clarity
- 1.5 m
Why Retenue de L'Estrade has no A–F grade
Retenue de L'Estrade 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 and algae (chlorophyll-a), but not phosphorus.
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 L'Estrade is a lake in Aude County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2024-10-10. 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 L'Estrade
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 4.9 ft. Chlorophyll-a: 1 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 1 µg/L | Not graded |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Retenue de L'Estrade
Compare lakeside cabins, hotels, and vacation rentals near Retenue de L'Estrade in Aude, 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 L'Estrade
Frequently asked questions about Retenue de L'Estrade
What is the water quality of Retenue de L'Estrade?
- Retenue de L'Estrade in Aude, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.5 m visibility. Chlorophyll-a (algae): 1 µg/L.
Is Retenue de L'Estrade safe to swim in?
- Retenue de L'Estrade 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
39 measurements from 1 monitoring station, 2018–2024. 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-fr39 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
O2215003
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.