Viljandi, Estonia
County page for 7 named lakes in Estonia. Official surface phosphorus, chlorophyll-a, and Secchi — not a swim-safety class and not a LakeQuality letter.
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Named lakes
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Kariste Järv | Viljandi | 65 µg/L | 30 µg/L | 1.4 m | 2023 |
| Mäeküla Järv | Viljandi | 54 µg/L | 21 µg/L | 1.5 m | 2025 |
| Õisu Järv | Viljandi | 40 µg/L | 17 µg/L | 1.4 m | 2025 |
| Parika Järv | Viljandi | 23 µg/L | 3.3 µg/L | 0.8 m | 2020 |
| Ruhijärv | Viljandi | 31 µg/L | 4.9 µg/L | 1.8 m | 2023 |
| Veisjärv | Viljandi | 44 µg/L | 24 µg/L | 0.8 m | 2021 |
| Viljandi Järv | Viljandi | 32 µg/L | 11 µg/L | 2.2 m | 2023 |
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