Altmühlsee
Altmühlsee in Weißenburg-Gunzenhausen, Bavaria has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.6 m visibility. Phosphorus: 140 µg/L. Chlorophyll-a (algae): 26 µg/L.
- Clarity
- 0.6 m
Why Altmühlsee has no A–F grade
Altmühlsee 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.
Altmühlsee is a lake in Weißenburg-Gunzenhausen County, Bavaria.
Source: the Bavarian Environment Agency (LfU) Gewässerkundlicher Dienst — not the EPA Water Quality Portal, last sampled 2024-12-09. 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 Altmühlsee
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 2 ft of visibility. Phosphorus level: 140 µg/L. Chlorophyll-a: 26 µg/L. Trophic State Index: 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.6 m | Not graded |
| Phosphorus | 140 µg/L | Not graded |
| Chlorophyll-a (Algae) | 26 µg/L | Not graded |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Altmühlsee
Compare lakeside cabins, hotels, and vacation rentals near Altmühlsee in Weißenburg-Gunzenhausen, 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 Altmühlsee
Frequently asked questions about Altmühlsee
What is the water quality of Altmühlsee?
- Altmühlsee in Weißenburg-Gunzenhausen, Bavaria has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.6 m visibility. Phosphorus: 140 µg/L. Chlorophyll-a (algae): 26 µg/L.
Is Altmühlsee safe to swim in?
- Altmühlsee 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
470 measurements from 1 monitoring station, 2016–2024. 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-by470 samples · —
Analytical methods
- LfU Bayern GKD lake chemistry
Monitoring station identifiers (1)
2175
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See how grades are calculated and data sources.