Plan D'Eau de Montbel Amont
Plan D'Eau de Montbel Amont in Ariège, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.9 m visibility. Chlorophyll-a (algae): 2 µg/L.
- Clarity
- 2.9 m
Why Plan D'Eau de Montbel Amont has no A–F grade
Plan D'Eau de Montbel Amont 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 and algae (chlorophyll-a), but not phosphorus.
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.
Plan D'Eau de Montbel Amont is a lake in Ariège 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 Plan D'Eau de Montbel Amont 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 Plan D'Eau de Montbel Amont
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 9.4 ft. Chlorophyll-a: 2 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.85 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 2 µg/L | Not graded |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Plan D'Eau de Montbel Amont
Compare lakeside cabins, hotels, and vacation rentals near Plan D'Eau de Montbel Amont in Ariège, 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 Plan D'Eau de Montbel Amont
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Plan D'Eau de Montbel Amont
Frequently asked questions about Plan D'Eau de Montbel Amont
What is the water quality of Plan D'Eau de Montbel Amont?
- Plan D'Eau de Montbel Amont in Ariège, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.9 m visibility. Chlorophyll-a (algae): 2 µg/L.
Is Plan D'Eau de Montbel Amont safe to swim in?
- Plan D'Eau de Montbel Amont 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 Plan D'Eau de Montbel Amont across LakeGrade
More lakes in France
Where this data comes from
41 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-fr41 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
O1475103
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.