Altmühlsee
Weißenburg-Gunzenhausen, BavariaView mapDirections
LfU publishes the water-quality measurements for Altmühlsee. Here is what has been measured.
- Limited data
Altmühlsee in Weißenburg-Gunzenhausen, Bavaria has official water-quality measurements, shown as reported. Water clarity: 0.6 m visibility. Phosphorus: 140 µg/L. Chlorophyll-a (algae): 26 µg/L.
How Altmühlsee is classified
Altmühlsee in Bavaria is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is 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. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Altmühlsee is safe to swim in today is a call for the Bavarian Environment Agency (LfU) Gewässerkundlicher Dienst and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Altmühlsee
These are the measurements LfU publishes for Altmühlsee. More on the source.
Very murky, less than 2 ft of visibility. Phosphorus 140 µg/L. Chlorophyll-a 26 µg/L. TSI 68.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.6m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 140µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 26µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 68 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Answers come straight from the public measurements and survey records on this page.
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Frequently asked questions about Altmühlsee
Where is Altmühlsee?
- Altmühlsee is a lake in Weißenburg-Gunzenhausen, Bavaria. This page reports official water-quality measurements, shown as reported.
What is the water quality of Altmühlsee?
- Altmühlsee in Weißenburg-Gunzenhausen, Bavaria has official water-quality measurements, shown as reported. 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 shown as the authority published them. See where the data comes from and data sources.