Großer Ostersee
Weilheim-Schongau, BavariaView mapDirections
LfU publishes the water-quality measurements for Großer Ostersee. Here is what has been measured.
- Limited data
Großer Ostersee in Weilheim-Schongau, Bavaria has official water-quality measurements, shown as reported. Water clarity: 3.4 m visibility. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 2 µg/L.
How Großer Ostersee is classified
Großer Ostersee 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.
Großer Ostersee is a lake in Weilheim-Schongau County, Bavaria.
Source: the Bavarian Environment Agency (LfU) Gewässerkundlicher Dienst — not the EPA Water Quality Portal, last sampled 2023-10-23. Methodology: how these readings are compared.
What Großer Ostersee is good for
From access and monitoring records, not editorial picks.
- Clear water11 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Großer Ostersee 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 Großer Ostersee
These are the measurements LfU publishes for Großer Ostersee. More on the source.
Good clarity, visible to about 11 ft. Phosphorus 7 µg/L. Chlorophyll-a 2 µg/L. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.35m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 7µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2µg/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. | 37 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Großer Ostersee
Answers come straight from the public measurements and survey records on this page.
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Frequently asked questions about Großer Ostersee
Where is Großer Ostersee?
- Großer Ostersee is a lake in Weilheim-Schongau, Bavaria. This page reports official water-quality measurements, shown as reported.
What is the water quality of Großer Ostersee?
- Großer Ostersee in Weilheim-Schongau, Bavaria has official water-quality measurements, shown as reported. Water clarity: 3.4 m visibility. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 2 µg/L.
Is Großer Ostersee safe to swim in?
- Großer Ostersee 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
107 measurements from 1 monitoring station, 2017–2023. 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-by107 samples · —
Analytical methods
- LfU Bayern GKD lake chemistry
Monitoring station identifiers (1)
2046
Authority classifications are shown as the authority published them. See where the data comes from and data sources.