Barrage-Réservoir de L'Astarac
Barrage-Réservoir de L'Astarac in Gers, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.2 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4 µg/L.
- Clarity
- 1.2 m
Why Barrage-Réservoir de L'Astarac has no A–F grade
Barrage-Réservoir de L'Astarac in France is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: the French water agencies, via UNEP GEMS/Water.
Barrage-Réservoir de L'Astarac 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. Grade methodology: LakeGrade methodology.
Watch Barrage-Réservoir de L'Astarac water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Barrage-Réservoir de L'Astarac
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 3.8 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 4 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.16 m | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4 µg/L | Not graded |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Barrage-Réservoir de L'Astarac
Compare lakeside cabins, hotels, and vacation rentals near Barrage-Réservoir de L'Astarac in Gers, France — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Barrage-Réservoir de L'Astarac
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Barrage-Réservoir de L'Astarac
Frequently asked questions about Barrage-Réservoir de L'Astarac
What is the water quality of Barrage-Réservoir de L'Astarac?
- Barrage-Réservoir de L'Astarac in Gers, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.2 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4 µg/L.
Is Barrage-Réservoir de L'Astarac safe to swim in?
- Barrage-Réservoir de L'Astarac 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.
Explore Barrage-Réservoir de L'Astarac across LakeGrade
More lakes in France
Where this data comes from
53 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-fr53 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
O60-4003
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.