Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy
Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy in Val-d'Oise, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.9 m visibility. Chlorophyll-a (algae): 1 µg/L.
- Clarity
- 3.9 m
Why Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy has no A–F grade
Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy 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 la Base de Plein Air Et de Loisirs de Cergy is a lake in Val-d'Oise County, France.
Source: the French water agencies, via UNEP GEMS/Water — not the EPA Water Quality Portal, last sampled 2025-09-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
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Water quality measurements for Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 12.8 ft. Chlorophyll-a: 1 µg/L. Trophic State Index: 35.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 m | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 1 µg/L | Not graded |
| Trophic State Index (TSI) | 35 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy
Compare lakeside cabins, hotels, and vacation rentals near Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy in Val-d'Oise, 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.
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Fishing Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy
Frequently asked questions about Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy
What is the water quality of Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy?
- Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy in Val-d'Oise, France has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 3.9 m visibility. Chlorophyll-a (algae): 1 µg/L.
Is Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy safe to swim in?
- Plan D'Eau de la Base de Plein Air Et de Loisirs de Cergy 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
20 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-fr20 samples · —
Analytical methods
- Hub'Eau / Naïades plans d'eau
Monitoring station identifiers (1)
H2299303
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.