Undu Laht
Saare, Estonia229 haView mapDirections
KAUR publishes the water-quality measurements for Undu Laht. Here is what has been measured.
- Limited data
Undu Laht in Saare, Estonia has official water-quality measurements, shown as reported. Water clarity: 1.2 m visibility. Phosphorus: 25.5 µg/L. Chlorophyll-a (algae): 5.8 µg/L. Surface area: 565.6 acres.
How Undu Laht is classified
Undu Laht in Estonia 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 Estonian Environment Agency (Keskkonnaagentuur).
Undu Laht is a 566-acre lake in Saare County, Estonia.
Source: the Estonian Environment Agency (Keskkonnaagentuur) — not the EPA Water Quality Portal, last sampled 2024-09-23. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Undu Laht is safe to swim in today is a call for the Estonian Environment Agency (Keskkonnaagentuur) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Undu Laht
These are the measurements KAUR publishes for Undu Laht. More on the source.
Murky, only visible to about 3.8 ft. Phosphorus 25.5 µg/L. Chlorophyll-a 5.8 µg/L. TSI 52.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.15m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 25.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 5.8µg/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. | 52 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Undu Laht
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
229 ha
The available depth estimate for Undu Laht is shallower than its measured water clarity, which cannot be right, so no depth is shown.
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Frequently asked questions about Undu Laht
Where is Undu Laht?
- Undu Laht is a lake in Saare, Estonia. This page reports official water-quality measurements, shown as reported.
What is the water quality of Undu Laht?
- Undu Laht in Saare, Estonia has official water-quality measurements, shown as reported. Water clarity: 1.2 m visibility. Phosphorus: 25.5 µg/L. Chlorophyll-a (algae): 5.8 µg/L. Surface area: 565.6 acres.
Is Undu Laht safe to swim in?
- Undu Laht 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.
How deep is Undu Laht?
- The available depth estimate for Undu Laht is shallower than its measured water clarity, which cannot be right, so no depth is shown. The lake covers 565.6 acres.
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Where this data comes from
24 measurements from 2 monitoring stations, 2018–2024. Retrieved from KESE / Estonian Environment Agency (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Estonian Environment Agency (Keskkonnaagentuur)
kese-ee24 samples · 2018–2024
Analytical methods
- KESE I-level monitoring
Monitoring station identifiers (2)
SJA5129003SJA5129000
Authority classifications are shown as the authority published them. See where the data comes from and data sources.