Neusiedler See
Neusiedler See in Unknown, Austria has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.2 m visibility. Phosphorus: 31 µg/L.
- Clarity
- 0.2 m
Why Neusiedler See has no A–F grade
Neusiedler See in Austria 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 and phosphorus, but not 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 Environment Agency Austria (Umweltbundesamt), via UNEP GEMS/Water.
Neusiedler See is a lake in Unknown County, Austria.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-10-18. 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 Neusiedler See
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 0.8 ft of visibility. Phosphorus level: 31 µg/L. Trophic State Index: 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.24 m | Not graded |
| Phosphorus | 31 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Neusiedler See
Compare lakeside cabins, hotels, and vacation rentals near Neusiedler See in Unknown, Austria — 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 Neusiedler See
Frequently asked questions about Neusiedler See
What is the water quality of Neusiedler See?
- Neusiedler See in Unknown, Austria has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.2 m visibility. Phosphorus: 31 µg/L.
Is Neusiedler See safe to swim in?
- Neusiedler See 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
171 measurements from 4 monitoring stations, 2016–2021. Retrieved from UNEP GEMS/Water GFQA (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- European Environment Agency
europeanenvironmentagenc171 samples · —
Analytical methods
- GEMStat OPEN / CC BY 4.0
Monitoring station identifiers (4)
AUT00231AUT00232AUT00233AUT00234
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See methodology and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2021-10-18
Monitoring stations: 4