Barrage de Couesque
Barrage de Couesque in Aveyron, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.7 m visibility. Chlorophyll-a (algae): 1 µg/L.
- Clarity
- 2.7 m
Why Barrage de Couesque has no A–F grade
Barrage de Couesque 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.
Barrage de Couesque is a lake in Aveyron County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2020-09-30. 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 Barrage de Couesque
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 8.8 ft. Chlorophyll-a: 1 µg/L. Trophic State Index: 38.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.69 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 1 µg/L | Not graded |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Barrage de Couesque
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Fishing Barrage de Couesque
Frequently asked questions about Barrage de Couesque
What is the water quality of Barrage de Couesque?
- Barrage de Couesque in Aveyron, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.7 m visibility. Chlorophyll-a (algae): 1 µg/L.
Is Barrage de Couesque safe to swim in?
- Barrage de Couesque 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
16 measurements from 1 monitoring station, 2020. 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-fr16 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
O77-5013
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.