La Grande Mare
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Eau France publishes the water-quality measurements for La Grande Mare. Here is what has been measured.
- Limited data
La Grande Mare in France has official water-quality measurements, shown as reported. Phosphorus: 110 µg/L.
How La Grande Mare is classified
La Grande Mare 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 phosphorus, but not water clarity and algae (chlorophyll-a).
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.
La Grande Mare is a lake in Unknown County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2023-09-27. 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 La Grande Mare 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 La Grande Mare
These are the measurements Eau France publishes for La Grande Mare. More on the source.
No clarity data. Phosphorus 110 µg/L. TSI 72.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 110µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading 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. | 72 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about La Grande Mare
Answers come straight from the public measurements and survey records on this page.
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Fishing La Grande Mare
Frequently asked questions about La Grande Mare
Where is La Grande Mare?
- La Grande Mare is a lake in France. This page reports official water-quality measurements, shown as reported.
What is the water quality of La Grande Mare?
- La Grande Mare in France has official water-quality measurements, shown as reported. Phosphorus: 110 µg/L.
Is La Grande Mare safe to swim in?
- La Grande Mare 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
4 measurements from 1 monitoring station, 2023. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- European Environment Agency
europeanenvironmentagenc4 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
FRA01811
Authority classifications are shown as the authority published them. See where the data comes from and data sources.