Lac de la Prade
Lac de la Prade in Gironde, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.4 m visibility. Chlorophyll-a (algae): 20.5 µg/L.
- Clarity
- 0.4 m
Why Lac de la Prade has no A–F grade
Lac de la Prade 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.
Lac de la Prade is a lake in Gironde County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2023-09-28. 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 Lac de la Prade
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 1.2 ft of visibility. Chlorophyll-a: 20.5 µg/L. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.38 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 20.5 µg/L | Not graded |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lac de la Prade
Compare lakeside cabins, hotels, and vacation rentals near Lac de la Prade in Gironde, 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 Lac de la Prade
Frequently asked questions about Lac de la Prade
What is the water quality of Lac de la Prade?
- Lac de la Prade in Gironde, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.4 m visibility. Chlorophyll-a (algae): 20.5 µg/L.
Is Lac de la Prade safe to swim in?
- Lac de la Prade 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.
Explore Lac de la Prade across LakeGrade
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Where this data comes from
24 measurements from 1 monitoring station, 2017–2023. 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)
O9415013
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.