Complexe de Guerledan
Complexe de Guerledan in Morbihan, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.6 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4 µg/L.
- Clarity
- 2.6 m
Why Complexe de Guerledan has no A–F grade
Complexe de Guerledan 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.
Complexe de Guerledan is a lake in Morbihan County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2025-10-08. Grade methodology: LakeGrade methodology.
Watch Complexe de Guerledan 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 Complexe de Guerledan
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 8.4 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 4 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.57 m | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4 µg/L | Not graded |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Complexe de Guerledan
Compare lakeside cabins, hotels, and vacation rentals near Complexe de Guerledan in Morbihan, 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 Complexe de Guerledan
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Complexe de Guerledan
Frequently asked questions about Complexe de Guerledan
What is the water quality of Complexe de Guerledan?
- Complexe de Guerledan in Morbihan, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 2.6 m visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4 µg/L.
Is Complexe de Guerledan safe to swim in?
- Complexe de Guerledan 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 Complexe de Guerledan across LakeGrade
More lakes in France
Where this data comes from
35 measurements from 1 monitoring station, 2019–2025. 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-fr35 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
J541500R
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.