Hopfensee
Hopfensee in Ostallgäu, Bavaria has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.6 m visibility. Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 12 µg/L.
- Clarity
- 1.6 m
Why Hopfensee has no A–F grade
Hopfensee in Bavaria 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 Bavarian Environment Agency (LfU) Gewässerkundlicher Dienst.
Hopfensee is a lake in Ostallgäu County, Bavaria.
Source: the Bavarian Environment Agency (LfU) Gewässerkundlicher Dienst — not the EPA Water Quality Portal, last sampled 2022-11-08. 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
Water quality measurements for Hopfensee
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 5.2 ft. Phosphorus level: 27.5 µg/L. Chlorophyll-a: 12 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 m | Not graded |
| Phosphorus | 27.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 12 µg/L | Not graded |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hopfensee
Compare lakeside cabins, hotels, and vacation rentals near Hopfensee in Ostallgäu, Bavaria — 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 Hopfensee
Frequently asked questions about Hopfensee
What is the water quality of Hopfensee?
- Hopfensee in Ostallgäu, Bavaria has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 1.6 m visibility. Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 12 µg/L.
Is Hopfensee safe to swim in?
- Hopfensee 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 Hopfensee across LakeGrade
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Where this data comes from
108 measurements from 1 monitoring station, 2016–2022. Retrieved from the listed programme (not the EPA Water Quality Portal). See data sources on 2026-08-20.
Collected and reported by
- Bayerisches Landesamt für Umwelt (LfU) — Gewässerkundlicher Dienst
gkd-by108 samples · —
Analytical methods
- LfU Bayern GKD lake chemistry
Monitoring station identifiers (1)
2007
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.