Lac Bleu
Hautes-Pyrénées, FranceView mapDirections
Eau France publishes the water-quality measurements for Lac Bleu. Here is what has been measured.
- Limited data
Lac Bleu in Hautes-Pyrénées, France has official water-quality measurements, shown as reported. Water clarity: 14.8 m visibility. Chlorophyll-a (algae): 1 µg/L.
How Lac Bleu is classified
Lac Bleu in France is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the French water agencies, via UNEP GEMS/Water.
Lac Bleu is a lake in Hautes-Pyrénées County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2022-11-07. Methodology: how these readings are compared.
What Lac Bleu is good for
From access and monitoring records, not editorial picks.
- Clear water48.6 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lac Bleu is safe to swim in today is a call for the French water agencies, via UNEP GEMS/Water and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lac Bleu
These are the measurements Eau France publishes for Lac Bleu. More on the source.
Crystal clear, you can see 48.6 ft down. Chlorophyll-a 1 µg/L. TSI 26.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 14.8m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 1µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 26 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
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Answers come straight from the public measurements and survey records on this page.
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Fishing Lac Bleu
Frequently asked questions about Lac Bleu
Where is Lac Bleu?
- Lac Bleu is a lake in Hautes-Pyrénées, France. This page reports official water-quality measurements, shown as reported.
What is the water quality of Lac Bleu?
- Lac Bleu in Hautes-Pyrénées, France has official water-quality measurements, shown as reported. Water clarity: 14.8 m visibility. Chlorophyll-a (algae): 1 µg/L.
Is Lac Bleu safe to swim in?
- Lac Bleu 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
48 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-fr48 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
Q0035033
Authority classifications are shown as the authority published them. See where the data comes from and data sources.