Etangs D Ardres
Etangs D Ardres in Unknown, France has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 154 µg/L.
Why Etangs D Ardres has no A–F grade
Etangs D Ardres 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 phosphorus, but not water clarity 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.
Etangs D Ardres is a lake in Unknown County, France.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2018-09-26. Grade methodology: LakeGrade methodology.
Watch Etangs D Ardres 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 Etangs D Ardres
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 154 µg/L. Trophic State Index: 77.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 154 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 77 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Etangs D Ardres
Compare lakeside cabins, hotels, and vacation rentals near Etangs D Ardres in Unknown, 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 Etangs D Ardres
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Fishing Etangs D Ardres
Frequently asked questions about Etangs D Ardres
What is the water quality of Etangs D Ardres?
- Etangs D Ardres in Unknown, France has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 154 µg/L.
Is Etangs D Ardres safe to swim in?
- Etangs D Ardres 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 Etangs D Ardres across LakeGrade
More lakes in France
Where this data comes from
11 measurements from 1 monitoring station, 2016–2018. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- European Environment Agency
europeanenvironmentagenc11 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (1)
FRA00201
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See methodology and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2018-09-26
Monitoring stations: 1