Petraičių Tvenkinys
Petraičių Tvenkinys in Šiaulių, Lithuania has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.8 m visibility. Phosphorus: 210 µg/L. Chlorophyll-a (algae): 49.8 µg/L.
- Clarity
- 0.8 m
Why Petraičių Tvenkinys has no A–F grade
Petraičių Tvenkinys 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 water clarity, phosphorus and 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 Environmental Protection Agency of Lithuania (Aplinkos apsaugos agentūra).
Petraičių Tvenkinys is a lake in Šiaulių County, Lithuania.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-09-30. 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 Petraičių Tvenkinys
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 2.6 ft of visibility. Phosphorus level: 210 µg/L. Chlorophyll-a: 49.8 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.8 m | Not graded |
| Phosphorus | 210 µg/L | Not graded |
| Chlorophyll-a (Algae) | 49.8 µg/L | Not graded |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Petraičių Tvenkinys
Compare lakeside cabins, hotels, and vacation rentals near Petraičių Tvenkinys 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 Petraičių Tvenkinys
Frequently asked questions about Petraičių Tvenkinys
What is the water quality of Petraičių Tvenkinys?
- Petraičių Tvenkinys in Šiaulių, Lithuania has official water-quality measurements, not a LakeQuality A–F grade. Water clarity: 0.8 m visibility. Phosphorus: 210 µg/L. Chlorophyll-a (algae): 49.8 µg/L.
Is Petraičių Tvenkinys safe to swim in?
- Petraičių Tvenkinys 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
24 measurements from 1 monitoring station, 2017–2020. 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-lt24 samples · 2017–2020
Analytical methods
- AAA lake state monitoring
Monitoring station identifiers (1)
LTL545
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: 2020-09-30
Monitoring stations: 1