Ilomantsi, Finland
County page for 44 named lakes in Finland. Official surface phosphorus, chlorophyll-a, and Secchi — not a swim-safety class and not a LakeQuality letter.
Lake map
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Named lakes
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Alinen Hietajärvi | Ilomantsi | 26 µg/L | 3.7 µg/L | 0.9 m | 2025 |
| Eteläinen Pitkäjärvi | Ilomantsi | 15 µg/L | 3.8 µg/L | 1.5 m | 2025 |
| Haapojärvi | Ilomantsi | 18 µg/L | 8.4 µg/L | 1.2 m | 2024 |
| Harkkojärvi | Ilomantsi | 18 µg/L | 7.4 µg/L | 1.4 m | 2022 |
| Hattujärvi | Ilomantsi | 24 µg/L | 5.9 µg/L | 1.2 m | 2025 |
| Hoikka Lake | Ilomantsi | 18 µg/L | 6.3 µg/L | 1.8 m | 2025 |
| Ilajanjärvi | Ilomantsi | 33 µg/L | 9.1 µg/L | 0.7 m | 2025 |
| Ilomantsinjärvi | Ilomantsi | 28 µg/L | 17 µg/L | 0.7 m | 2025 |
| Iso Ahvenjärvi | Ilomantsi | 4.4 µg/L | 1.5 µg/L | 4.5 m | 2025 |
| Iso Kivijärvi | Ilomantsi | 12 µg/L | 6.5 µg/L | 1.2 m | 2021 |
| Iso Simolampi | Ilomantsi | 14 µg/L | 4.2 µg/L | 1.9 m | 2023 |
| Kälkäjärvi | Ilomantsi | 23 µg/L | 6.4 µg/L | 1.3 m | 2021 |
| Kätkänjärvi | Ilomantsi | 38 µg/L | 16 µg/L | 1.1 m | 2025 |
| Kauniinjärvi | Ilomantsi | 15 µg/L | 6.6 µg/L | 1.3 m | 2021 |
| Koitere Lake | Ilomantsi | 8.9 µg/L | 3.8 µg/L | 2.2 m | 2026 |
| Konnukka Lake | Ilomantsi | 20 µg/L | 6.3 µg/L | 1.5 m | 2025 |
| Kultajärvi | Ilomantsi | 25 µg/L | 4.1 µg/L | 1.6 m | 2025 |
| Kulujärvi | Ilomantsi | 16 µg/L | 7.9 µg/L | 1.4 m | 2022 |
| Lahnajärvi | Ilomantsi | 17 µg/L | 1.7 µg/L | 1.9 m | 2025 |
| Lapiojärvi | Ilomantsi | 15 µg/L | 6.2 µg/L | 1.4 m | 2023 |
| Mekrijärvi | Ilomantsi | 24 µg/L | 17 µg/L | 0.7 m | 2025 |
| Naarvanjärvi | Ilomantsi | 20 µg/L | 4.3 µg/L | 0.9 m | 2024 |
| Niemijärvi | Ilomantsi | 15 µg/L | 4.2 µg/L | 1.7 m | 2023 |
| Niettaanselkä Lake | Ilomantsi | 14 µg/L | 4.5 µg/L | 1.3 m | 2023 |
| Nuorajärvi | Ilomantsi | 20 µg/L | 9.5 µg/L | 1.1 m | 2024 |
| Oskajärvi | Ilomantsi | 22 µg/L | 14 µg/L | 1.2 m | 2023 |
| Petkeljärvi | Ilomantsi | 15 µg/L | 8.6 µg/L | 1.3 m | 2024 |
| Pieni Tetrijärvi | Ilomantsi | 13 µg/L | 4.4 µg/L | 1.6 m | 2018 |
| Pirttijärvi | Ilomantsi | 19 µg/L | 9.1 µg/L | 1.1 m | 2023 |
| Pyöreä Lake | Ilomantsi | 19 µg/L | 2.0 µg/L | 1.4 m | 2026 |
| Ravajärvet Lake | Ilomantsi | 11 µg/L | 3.0 µg/L | 2.7 m | 2022 |
| Särkkäjärvi | Ilomantsi | 3.0 µg/L | 1.0 µg/L | 10 m | 2023 |
| Satulainen Lake | Ilomantsi | 17 µg/L | 6.6 µg/L | 0.8 m | 2018 |
| Sonkajanjärvi | Ilomantsi | 14 µg/L | 4.7 µg/L | 1.5 m | 2024 |
| Suuri Tetrijärvi | Ilomantsi | 7.7 µg/L | 2.5 µg/L | 2.8 m | 2026 |
| Suuri-Miela Lake | Ilomantsi | 16 µg/L | 4.0 µg/L | 1.1 m | 2018 |
| Sysmä Lake | Ilomantsi | 10 µg/L | 3.9 µg/L | 2.2 m | 2025 |
| Syväjärvi | Ilomantsi | 21 µg/L | 7.5 µg/L | 1.2 m | 2021 |
| Umpijärvi | Ilomantsi | 18 µg/L | 12 µg/L | 0.8 m | 2026 |
| Valkeajärvi | Ilomantsi | 6.4 µg/L | 2.2 µg/L | 4.6 m | 2025 |
| Valkiajärvi | Ilomantsi | 12 µg/L | 4.9 µg/L | 2.0 m | 2026 |
| Vänskänjärvi | Ilomantsi | 11 µg/L | 3.9 µg/L | 1.5 m | 2017 |
| Viiksinselkä Lake | Ilomantsi | 20 µg/L | 8.7 µg/L | 1.0 m | 2023 |
| Viinijärvi | Ilomantsi | 24 µg/L | 11 µg/L | 1.4 m | 2021 |
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