Le Lac des Vieilles Forges
Ardennes, FranceView mapDirections
Eau France publishes the water-quality measurements for Le Lac des Vieilles Forges. Here is what has been measured.
- Limited data
Le Lac des Vieilles Forges in Ardennes, France has official water-quality measurements, shown as reported. Water clarity: 1.1 m visibility. Chlorophyll-a (algae): 5 µg/L.
How Le Lac des Vieilles Forges is classified
Le Lac des Vieilles Forges 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 des Vieilles Forges is a lake in Ardennes County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2017-07-25. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Le Lac des Vieilles Forges 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 des Vieilles Forges
These are the measurements Eau France publishes for Le Lac des Vieilles Forges. More on the source.
Murky, only visible to about 3.6 ft. Chlorophyll-a 5 µg/L. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.1m | 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) | 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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Le Lac des Vieilles Forges
Where is Le Lac des Vieilles Forges?
- Le Lac des Vieilles Forges is a lake in Ardennes, France. This page reports official water-quality measurements, shown as reported.
What is the water quality of Le Lac des Vieilles Forges?
- Le Lac des Vieilles Forges in Ardennes, France has official water-quality measurements, shown as reported. Water clarity: 1.1 m visibility. Chlorophyll-a (algae): 5 µg/L.
Is Le Lac des Vieilles Forges safe to swim in?
- Le Lac des Vieilles Forges 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
6 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-fr6 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
B7025203
Authority classifications are shown as the authority published them. See where the data comes from and data sources.