Mäntyharju, Finland
County page for 54 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 |
|---|---|---|---|---|---|
| Ahvenjärvi | Mäntyharju | 11 µg/L | 6.2 µg/L | 2.4 m | 2023 |
| Aitjärvi | Mäntyharju | 16 µg/L | 9.3 µg/L | 1.3 m | 2024 |
| Ala-Pahkajärvi | Mäntyharju | 4.4 µg/L | 1.2 µg/L | 3.3 m | 2026 |
| Alimmainen Lake | Mäntyharju | 8.9 µg/L | 1.8 µg/L | 2.0 m | 2026 |
| Etelä-Tervajärvi | Mäntyharju | 14 µg/L | 7.1 µg/L | 1.1 m | 2023 |
| Harjulampi | Mäntyharju | 23 µg/L | 32 µg/L | 0.8 m | 2025 |
| Haukilampi | Mäntyharju | 10 µg/L | 7.1 µg/L | 2.0 m | 2017 |
| Herajärvi | Mäntyharju | 3.9 µg/L | 2.4 µg/L | 5.5 m | 2021 |
| Hietajärvi | Mäntyharju | 19 µg/L | 15 µg/L | 1.8 m | 2026 |
| Hietajärvi | Mäntyharju | 22 µg/L | 7.2 µg/L | 1.0 m | 2026 |
| Hietasenjärvi | Mäntyharju | 12 µg/L | 27 µg/L | 1.7 m | 2020 |
| Hiukkanen Lake | Mäntyharju | 5.4 µg/L | — | 1.3 m | 2020 |
| Iso Suojärvi | Mäntyharju | 12 µg/L | 5.8 µg/L | 1.5 m | 2021 |
| Juolasvesi-Sarkavesi | Mäntyharju | 4.8 µg/L | 2.7 µg/L | 4.8 m | 2023 |
| Kaitajärvi | Mäntyharju | 5.2 µg/L | 1.0 µg/L | 3.6 m | 2026 |
| Kaituu Lake | Mäntyharju | 16 µg/L | 17 µg/L | 1.4 m | 2025 |
| Kalettomanjärvi | Mäntyharju | 3.0 µg/L | 1.0 µg/L | 5.0 m | 2026 |
| Kaljujärvi-Kaita | Mäntyharju | 4.5 µg/L | 1.0 µg/L | 2.9 m | 2026 |
| Kelkyttee Lake | Mäntyharju | 11 µg/L | 6.1 µg/L | 1.8 m | 2021 |
| Keskinen Lake | Mäntyharju | 9.8 µg/L | 4.2 µg/L | 1.9 m | 2026 |
| Kihliänjärvi-Nuolinki | Mäntyharju | 7.1 µg/L | 2.9 µg/L | 2.1 m | 2022 |
| Kinnijärvi | Mäntyharju | — | — | 4.0 m | 2020 |
| Korpijärvi | Mäntyharju | 3.0 µg/L | 2.0 µg/L | 4.9 m | 2024 |
| Kotajärvi | Mäntyharju | 3.6 µg/L | 2.3 µg/L | 3.5 m | 2021 |
| Kousanjärvi-Keskinen | Mäntyharju | 4.0 µg/L | 3.0 µg/L | 4.1 m | 2024 |
| Lahnavesi | Mäntyharju | 5.0 µg/L | 3.3 µg/L | 3.2 m | 2026 |
| Lautjärvi | Mäntyharju | 19 µg/L | 3.5 µg/L | 1.9 m | 2026 |
| Lietjärvi | Mäntyharju | 15 µg/L | — | 1.4 m | 2019 |
| Lihava Lake | Mäntyharju | 11 µg/L | 5.1 µg/L | 2.9 m | 2026 |
| Mustajärvi | Mäntyharju | 4.3 µg/L | 1.1 µg/L | 3.0 m | 2026 |
| Partsimaanjärvi | Mäntyharju | 10 µg/L | 3.7 µg/L | 1.6 m | 2023 |
| Patajärvi | Mäntyharju | — | — | 2.2 m | 2020 |
| Pekkolanlampi | Mäntyharju | 31 µg/L | 13 µg/L | 1.6 m | 2019 |
| Peruvesi | Mäntyharju | 6.0 µg/L | 3.5 µg/L | 2.9 m | 2025 |
| Pieni Pyhävesi | Mäntyharju | 9.5 µg/L | 4.5 µg/L | 1.9 m | 2026 |
| Pieni-Sämpiä Lake | Mäntyharju | 5.8 µg/L | 3.1 µg/L | 1.6 m | 2025 |
| Pienivesi | Mäntyharju | 9.8 µg/L | 5.4 µg/L | 2.1 m | 2023 |
| Pitkäjärvi | Mäntyharju | 8.3 µg/L | 2.0 µg/L | 1.9 m | 2026 |
| Pyhävesi | Mäntyharju | 10 µg/L | 7.2 µg/L | 2.0 m | 2025 |
| Pyöreäjärvi | Mäntyharju | 5.7 µg/L | 3.4 µg/L | 3.0 m | 2026 |
| Sääskijärvi | Mäntyharju | 15 µg/L | 4.2 µg/L | 1.8 m | 2026 |
| Särkämänjärvi | Mäntyharju | 6.1 µg/L | 4.4 µg/L | 3.0 m | 2022 |
| Savon Hartonen Lake | Mäntyharju | 20 µg/L | 53 µg/L | 1.2 m | 2024 |
| Siikanen Lake | Mäntyharju | 4.3 µg/L | 1.0 µg/L | 3.5 m | 2026 |
| Siikasenjärvi-Pankajärvi | Mäntyharju | 14 µg/L | 5.0 µg/L | 1.9 m | 2026 |
| Suuri Varpasenjärvi | Mäntyharju | 7.0 µg/L | 1.3 µg/L | 3.1 m | 2026 |
| Tainavesi | Mäntyharju | 8.1 µg/L | — | 2.0 m | 2025 |
| Tervajärvi | Mäntyharju | 16 µg/L | 41 µg/L | 1.4 m | 2024 |
| Tuusjärvi | Mäntyharju | 5.3 µg/L | 4.5 µg/L | 2.5 m | 2021 |
| Vähä-Vehkajärvi | Mäntyharju | 8.5 µg/L | — | 1.8 m | 2020 |
| Vehkajärvi | Mäntyharju | 6.8 µg/L | 3.3 µg/L | 2.2 m | 2023 |
| Vessanjärvi | Mäntyharju | 4.1 µg/L | 2.5 µg/L | 3.7 m | 2018 |
| Vuorijärvi | Mäntyharju | 9.9 µg/L | 2.9 µg/L | 2.5 m | 2020 |
| Ylimmäinen Raajärvi | Mäntyharju | 20 µg/L | 27 µg/L | 1.1 m | 2024 |
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