Where is Barrage de Lunax?

Barrage de Lunax is a lake in Gers, France. This page reports official water-quality measurements, shown as reported.

Is Barrage de Lunax safe to swim in?

Barrage de Lunax 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.

Barrage de Lunax

Gers, FranceView map Directions

Eau France publishes the water-quality measurements for Barrage de Lunax. Here is what has been measured.

Clarity

2.8 m

Clearer than most

Secchi · sampled 2024

Phosphorus

10 µg/L

Less phosphorus than most

Measured by Eau France

Chlorophyll-a

1.5 µg/L

Less algae than most

Measured by Eau France

Limited data

See the measurements Directions Where to stay

Barrage de Lunax in Gers, France has official water-quality measurements, shown as reported. Water clarity: 2.8 m visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1.5 µg/L.

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How Barrage de Lunax is classified

Barrage de Lunax 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, phosphorus 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.

Barrage de Lunax is a lake in Gers County, France.

Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2024-09-26. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Barrage de Lunax 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.

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Water quality measurements for Barrage de Lunax

These are the measurements Eau France publishes for Barrage de Lunax. More on the source.

Moderate clarity, visible to about 9.3 ft. Phosphorus 10 µg/L. Chlorophyll-a 1.5 µg/L. TSI 39.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	2.84m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	10µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	1.5µg/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.	39	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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Stays near Barrage de Lunax

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Fishing Barrage de Lunax

→ Barrage de Lunax fishing regulations (limits, seasons, special rules)

Frequently asked questions about Barrage de Lunax

Where is Barrage de Lunax?: Barrage de Lunax is a lake in Gers, France. This page reports official water-quality measurements, shown as reported.
What is the water quality of Barrage de Lunax?: Barrage de Lunax in Gers, France has official water-quality measurements, shown as reported. Water clarity: 2.8 m visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1.5 µg/L.
Is Barrage de Lunax safe to swim in?: Barrage de Lunax 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

76 measurements from 1 monitoring station, 2018–2024. 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-fr76 samples · —

Analytical methods

Hub'Eau / Naïades plans d'eau

Monitoring station identifiers (1)

O2705023

Authority classifications are shown as the authority published them. See where the data comes from and data sources.