Le Lac de Longemer
Vosges, FranceView mapDirections
Eau France publishes the water-quality measurements for Le Lac de Longemer. Here is what has been measured.
- Limited data
Le Lac de Longemer in Vosges, France has official water-quality measurements, shown as reported. Water clarity: 5 m visibility. Chlorophyll-a (algae): 2.5 µg/L.
How Le Lac de Longemer is classified
Le Lac de Longemer 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.
Le Lac de Longemer is a lake in Vosges County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2017-09-27. Methodology: how these readings are compared.
What Le Lac de Longemer is good for
From access and monitoring records, not editorial picks.
- Clear water16.4 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Le Lac de Longemer 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 Le Lac de Longemer
These are the measurements Eau France publishes for Le Lac de Longemer. More on the source.
Crystal clear, you can see 16.4 ft down. Chlorophyll-a 2.5 µg/L. TSI 38.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5m | 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) | 2.5µg/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. | 38 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Le Lac de Longemer
Answers come straight from the public measurements and survey records on this page.
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Fishing Le Lac de Longemer
Frequently asked questions about Le Lac de Longemer
Where is Le Lac de Longemer?
- Le Lac de Longemer is a lake in Vosges, France. This page reports official water-quality measurements, shown as reported.
What is the water quality of Le Lac de Longemer?
- Le Lac de Longemer in Vosges, France has official water-quality measurements, shown as reported. Water clarity: 5 m visibility. Chlorophyll-a (algae): 2.5 µg/L.
Is Le Lac de Longemer safe to swim in?
- Le Lac de Longemer 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
8 measurements from 1 monitoring station, 2017. 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-fr8 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
A4306203
Authority classifications are shown as the authority published them. See where the data comes from and data sources.