Biržulis Lake
Biržulis Lake in Šiaulių, Lithuania has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 43.5 µg/L. Chlorophyll-a (algae): 3.3 µg/L.
Why Biržulis Lake has no A–F grade
Biržulis Lake in Lithuania 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 phosphorus and algae (chlorophyll-a), but not water clarity.
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 Environmental Protection Agency of Lithuania (Aplinkos apsaugos agentūra).
Biržulis Lake is a lake in Šiaulių County, Lithuania.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2017-09-26. 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 Biržulis Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 43.5 µg/L. Chlorophyll-a: 3.3 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 43.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 3.3 µg/L | Not graded |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Biržulis Lake
Compare lakeside cabins, hotels, and vacation rentals near Biržulis Lake in Šiaulių, Lithuania — 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 Biržulis Lake
Frequently asked questions about Biržulis Lake
What is the water quality of Biržulis Lake?
- Biržulis Lake in Šiaulių, Lithuania has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 43.5 µg/L. Chlorophyll-a (algae): 3.3 µg/L.
Is Biržulis Lake safe to swim in?
- Biržulis Lake 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
8 measurements from 1 monitoring station, 2017. Retrieved from Lithuanian lake state monitoring (AAA; not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Environmental Protection Agency of Lithuania (Aplinkos apsaugos agentūra)
aaa-lt8 samples · 2017
Analytical methods
- AAA lake state monitoring
Monitoring station identifiers (1)
LTL208
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: 2017-09-26
Monitoring stations: 1