Where is Didžiulis Lake?

Didžiulis Lake is a lake in Vilniaus, Lithuania. This page reports official water-quality measurements, shown as reported.

Is Didžiulis Lake safe to swim in?

Didžiulis 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.

Didžiulis Lake

Vilniaus, LithuaniaView map Directions

AAA publishes the water-quality measurements for Didžiulis Lake. Here is what has been measured.

Clarity

0.8 m

Murkier than most

Secchi · sampled 2022

Phosphorus

87 µg/L

More phosphorus than most

Measured by AAA

Chlorophyll-a

33.8 µg/L

More algae than most

Measured by AAA

Limited data

See the measurements Directions Where to stay

Didžiulis Lake in Vilniaus, Lithuania has official water-quality measurements, shown as reported. Water clarity: 0.8 m visibility. Phosphorus: 87 µg/L. Chlorophyll-a (algae): 33.8 µg/L.

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How Didžiulis Lake is classified

Didžiulis Lake in Lithuania 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 Environmental Protection Agency of Lithuania (Aplinkos apsaugos agentūra).

Didžiulis Lake is a lake in Vilniaus County, Lithuania.

Source: the Environmental Protection Agency of Lithuania (Aplinkos apsaugos agentūra) — not the EPA Water Quality Portal, last sampled 2022-10-05. 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 Didžiulis Lake is safe to swim in today is a call for the Environmental Protection Agency of Lithuania (Aplinkos apsaugos agentūra) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Didžiulis Lake

These are the measurements AAA publishes for Didžiulis Lake. More on the source.

Very murky, less than 2.6 ft of visibility. Phosphorus 87 µg/L. Chlorophyll-a 33.8 µg/L. TSI 66.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	0.8m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	87µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	33.8µg/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.	66	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

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Fishing Didžiulis Lake

→ Didžiulis Lake fishing regulations (limits, seasons, special rules)

Frequently asked questions about Didžiulis Lake

Where is Didžiulis Lake?: Didžiulis Lake is a lake in Vilniaus, Lithuania. This page reports official water-quality measurements, shown as reported.
What is the water quality of Didžiulis Lake?: Didžiulis Lake in Vilniaus, Lithuania has official water-quality measurements, shown as reported. Water clarity: 0.8 m visibility. Phosphorus: 87 µg/L. Chlorophyll-a (algae): 33.8 µg/L.
Is Didžiulis Lake safe to swim in?: Didžiulis 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

47 measurements from 2 monitoring stations, 2017–2022. 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-lt47 samples · 2017–2022

Analytical methods

AAA lake state monitoring

Monitoring station identifiers (2)

LTL274
LTL134

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