Where is Grüntensee?

Grüntensee is a lake in Oberallgäu, Bavaria. This page reports official water-quality measurements, shown as reported.

Is Grüntensee safe to swim in?

Grüntensee 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.

Grüntensee

Oberallgäu, BavariaView map Directions

LfU publishes the water-quality measurements for Grüntensee. Here is what has been measured.

Clarity

1.5 m

Murkier than most

Secchi · sampled 2023

Phosphorus

24 µg/L

More phosphorus than most

Measured by LfU

Chlorophyll-a

3 µg/L

Typical for Bavaria

Measured by LfU

Limited data

See the measurements Directions Where to stay

Grüntensee in Oberallgäu, Bavaria has official water-quality measurements, shown as reported. Water clarity: 1.5 m visibility. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 3 µg/L.

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How Grüntensee is classified

Grüntensee 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.

Grüntensee is a lake in Oberallgäu County, Bavaria.

Source: the Bavarian Environment Agency (LfU) Gewässerkundlicher Dienst — not the EPA Water Quality Portal, last sampled 2023-10-19. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Grüntensee 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.

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Water quality measurements for Grüntensee

These are the measurements LfU publishes for Grüntensee. More on the source.

Murky, only visible to about 4.9 ft. Phosphorus 24 µg/L. Chlorophyll-a 3 µg/L. TSI 49.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	1.5m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	24µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	3µg/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.	49	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Grüntensee

Answers come straight from the public measurements and survey records on this page.

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Fishing Grüntensee

→ Grüntensee fishing regulations (limits, seasons, special rules)

Frequently asked questions about Grüntensee

Where is Grüntensee?: Grüntensee is a lake in Oberallgäu, Bavaria. This page reports official water-quality measurements, shown as reported.
What is the water quality of Grüntensee?: Grüntensee in Oberallgäu, Bavaria has official water-quality measurements, shown as reported. Water clarity: 1.5 m visibility. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 3 µg/L.
Is Grüntensee safe to swim in?: Grüntensee 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

95 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 Dienstgkd-by95 samples · —

Analytical methods

LfU Bayern GKD lake chemistry

Monitoring station identifiers (1)

2243

Authority classifications are shown as the authority published them. See where the data comes from and data sources.