Lac des Graoussettes
Lac des Graoussettes in Lot-et-Garonne, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.6 m visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 12 µg/L.
- Clarity
- 0.6 m
Why Lac des Graoussettes has no A–F grade
Lac des Graoussettes 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.
Lac des Graoussettes is a lake in Lot-et-Garonne County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2022-09-27. 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 des Graoussettes
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 2.1 ft of visibility. Phosphorus level: 40 µg/L. Chlorophyll-a: 12 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.64 m | Not graded |
| Phosphorus | 40 µg/L | Not graded |
| Chlorophyll-a (Algae) | 12 µg/L | Not graded |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lac des Graoussettes
Compare lakeside cabins, hotels, and vacation rentals near Lac des Graoussettes in Lot-et-Garonne, 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 des Graoussettes
Frequently asked questions about Lac des Graoussettes
What is the water quality of Lac des Graoussettes?
- Lac des Graoussettes in Lot-et-Garonne, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.6 m visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 12 µg/L.
Is Lac des Graoussettes safe to swim in?
- Lac des Graoussettes 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
58 measurements from 1 monitoring station, 2016–2022. 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-fr58 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
O9305023
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.