Lakes in Northern Poland, Poland
Find lakes in Northern Poland: region page for 250 named lakes in Poland. Official surface phosphorus, chlorophyll-a, and Secchi, shown as the authority reports them; none is a swim-safety class.
Lake map
Map shows 250 lakes with coordinates
Named lakes
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Arklickie | LW30525 | 35 µg/L | 5.3 µg/L | 1.1 m | 2024 |
| Bądzkie | LW20758 | 89 µg/L | 30 µg/L | 0.7 m | 2025 |
| Bałądź | LW90100 | 38 µg/L | 2.4 µg/L | 4.7 m | 2024 |
| Balewskie | LW20769 | 62 µg/L | 22 µg/L | 1.4 m | 2026 |
| Barlewickie | LW20771 | 78 µg/L | 35 µg/L | 1.5 m | 2025 |
| Bartężek | LW20100 | 79 µg/L | 51 µg/L | 0.6 m | 2025 |
| Berżnik | LW30676 | 52 µg/L | 3.3 µg/L | 4.8 m | 2025 |
| Białe | LW20718 | 28 µg/L | 6.8 µg/L | 2.8 m | 2026 |
| Białe | LW20740 | 28 µg/L | 4.7 µg/L | 3.4 m | 2024 |
| Białe Augustowskie | LW30034 | 27 µg/L | — | 3.5 m | 2026 |
| Białe Filipowskie | LW30583 | 57 µg/L | 3.9 µg/L | 5.5 m | 2024 |
| Białe Wigierskie | LW30622 | 25 µg/L | 2.8 µg/L | 8.2 m | 2025 |
| Białowierśnie | LW30646 | — | — | 3.3 m | 2026 |
| Bielsko | LW10548 | 54 µg/L | — | 2.0 m | 2026 |
| Blizno | LW30027 | — | — | 3.5 m | 2026 |
| Bobięcińskie Wielkie | LW20887 | 13 µg/L | 5.2 µg/L | 5.3 m | 2025 |
| Boczne | LW30152 | 28 µg/L | — | 2.9 m | 2026 |
| Boczne | LW30588 | 46 µg/L | 7.7 µg/L | 3.1 m | 2024 |
| Boksze | LW30663 | 34 µg/L | 9.2 µg/L | 2.5 m | 2025 |
| Bolesty | LW30017 | 40 µg/L | 24 µg/L | 1.4 m | 2024 |
| Borzechowskie Wielkie | LW20695 | 36 µg/L | 14 µg/L | 2.6 m | 2026 |
| Borzyszkowskie | LW20313 | 27 µg/L | 8.6 µg/L | 3.7 m | 2024 |
| Boskie | LW30501 | 65 µg/L | 26 µg/L | 0.6 m | 2024 |
| Brzeźno | LW20331 | 32 µg/L | 19 µg/L | 1.4 m | 2025 |
| Bukowo | LW20912 | 128 µg/L | 114 µg/L | 0.3 m | 2024 |
| Buwełno | LW30146 | 23 µg/L | — | 1.6 m | 2024 |
| Chlewo | LW20899 | 16 µg/L | 9.2 µg/L | 3.0 m | 2025 |
| Choczewskie | LW21050 | 23 µg/L | 4.8 µg/L | 2.4 m | 2025 |
| Ciemno | LW20259 | 163 µg/L | 55 µg/L | 1.0 m | 2026 |
| Czarne | LW21051 | 47 µg/L | 32 µg/L | 0.3 m | 2024 |
| Dąbrówka | LW20770 | 141 µg/L | 281 µg/L | 0.3 m | 2026 |
| Dąbrze | LW21052 | 61 µg/L | 35 µg/L | 0.3 m | 2024 |
| Damaszka | LW20707 | 69 µg/L | 58 µg/L | 0.5 m | 2024 |
| Dargin | LW30538 | — | — | 3.5 m | 2026 |
| Dejguny | LW30129 | 22 µg/L | 6.5 µg/L | 3.0 m | 2025 |
| Długie | LW20528 | 43 µg/L | 9.8 µg/L | 0.7 m | 2026 |
| Długie | LW21029 | 36 µg/L | 11 µg/L | 2.4 m | 2026 |
| Długie Augustowskie | LW30029 | 29 µg/L | 8.5 µg/L | 2.9 m | 2025 |
| Długie Krasnopolskie | LW30640 | 47 µg/L | 3.9 µg/L | 5.2 m | 2024 |
| Długie Wigierskie | LW30619 | 33 µg/L | 5.3 µg/L | 2.3 m | 2026 |
| Dmitrowo | LW30637 | 52 µg/L | 5.0 µg/L | 4.0 m | 2025 |
| Dobskie | LW30075 | 22 µg/L | 4.3 µg/L | 3.6 m | 2025 |
| Dobskie | LW30534 | 22 µg/L | 5.2 µg/L | 3.1 m | 2024 |
| Dowcień | LW30632 | 27 µg/L | 8.3 µg/L | 2.6 m | 2024 |
| Druglin | LW30247 | 27 µg/L | 16 µg/L | 1.1 m | 2025 |
| Druzno | LW20779 | 248 µg/L | 102 µg/L | 0.3 m | 2025 |
| Dybrzk | LW20362 | 60 µg/L | 21 µg/L | 1.8 m | 2024 |
| Dymno | LW20265 | 18 µg/L | 4.1 µg/L | 4.8 m | 2025 |
| Dzierzgoń | LW20764 | 73 µg/L | 49 µg/L | 1.1 m | 2026 |
| Ełckie | LW30114 | 34 µg/L | — | 1.6 m | 2026 |
| Ewingi | LW20115 | 112 µg/L | 157 µg/L | 0.2 m | 2024 |
| Gaładuś | LW30611 | 24 µg/L | 4.7 µg/L | 4.1 m | 2024 |
| Garbas | LW30009 | 33 µg/L | 13 µg/L | 2.1 m | 2025 |
| Gardno | LW21028 | 203 µg/L | 130 µg/L | 0.3 m | 2026 |
| Gatno | LW20668 | 46 µg/L | 13 µg/L | 1.1 m | 2026 |
| Gawlik | LW30099 | 34 µg/L | — | 1.9 m | 2024 |
| Gieret | LW30671 | 24 µg/L | — | 2.4 m | 2024 |
| Głębockie | LW30365 | 96 µg/L | 21 µg/L | 0.9 m | 2024 |
| Głębokie | LW20257 | 41 µg/L | 6.9 µg/L | 3.6 m | 2024 |
| Głębokie | LW20980 | 49 µg/L | 15 µg/L | 1.8 m | 2026 |
| Glinno | LW20970 | 24 µg/L | 4.5 µg/L | 3.7 m | 2025 |
| Godziszewskie | LW20711 | 77 µg/L | 19 µg/L | 2.0 m | 2024 |
| Gołdapiwo | LW30552 | 33 µg/L | — | 2.7 m | 2026 |
| Gowidlińskie | LW20956 | 36 µg/L | 6.7 µg/L | 4.6 m | 2026 |
| Gremzdel | LW30634 | 51 µg/L | 18 µg/L | 1.4 m | 2026 |
| Gremzdy | LW30639 | 36 µg/L | 19 µg/L | 1.8 m | 2024 |
| Gwiazdy | LW20317 | 20 µg/L | 4.2 µg/L | 4.3 m | 2025 |
| Hańcza | LW30614 | 29 µg/L | 3.0 µg/L | 6.0 m | 2025 |
| Harsz | LW30570 | 27 µg/L | 17 µg/L | 1.9 m | 2025 |
| Hołny | LW30612 | — | — | 3.6 m | 2026 |
| Hutowe | LW20669 | 46 µg/L | 37 µg/L | 0.8 m | 2024 |
| Iławki | LW30128 | 49 µg/L | 28 µg/L | 0.9 m | 2025 |
| Ilińsk | LW20103 | 126 µg/L | — | 1.9 m | 2026 |
| Isąg | LW30338 | 66 µg/L | 14 µg/L | 1.8 m | 2025 |
| Jagodne | LW30153 | 30 µg/L | — | 1.6 m | 2026 |
| Jamno | LW20904 | 199 µg/L | 81 µg/L | 0.3 m | 2025 |
| Jasień Pd. | LW21008 | 59 µg/L | 10 µg/L | 2.3 m | 2026 |
| Jasień Pn. | LW21009 | 51 µg/L | 7.1 µg/L | 3.0 m | 2026 |
| Jeleń | LW20991 | — | 4.7 µg/L | 6.3 m | 2026 |
| Jemieliste | LW30019 | 28 µg/L | — | 3.4 m | 2024 |
| Junno | LW21022 | 34 µg/L | 4.6 µg/L | 3.8 m | 2024 |
| Kamienica | LW20867 | — | — | 3.8 m | 2026 |
| Kamienickie | LW21016 | 122 µg/L | 87 µg/L | 0.4 m | 2025 |
| Kamienno | LW20896 | 37 µg/L | 4.4 µg/L | 4.3 m | 2024 |
| Karsińskie | LW20310 | 54 µg/L | 26 µg/L | 2.1 m | 2024 |
| Kiedrowickie | LW20350 | 32 µg/L | 13 µg/L | 1.7 m | 2026 |
| Kielsk | LW20349 | 34 µg/L | 9.5 µg/L | 3.9 m | 2024 |
| Kiermas | LW30452 | 109 µg/L | — | 0.7 m | 2026 |
| Kinkajmskie | LW30475 | 88 µg/L | 50 µg/L | 0.8 m | 2024 |
| Kirsajty | LW30543 | 27 µg/L | — | 2.7 m | 2026 |
| Kisajno | LW30530 | — | — | 2.5 m | 2026 |
| Klasztorne Duże | LW20734 | 32 µg/L | 20 µg/L | 1.8 m | 2025 |
| Kopań | LW20950 | 78 µg/L | 64 µg/L | 0.3 m | 2025 |
| Koprowo | LW20807 | 119 µg/L | — | 0.3 m | 2024 |
| Kościelne | LW30587 | 47 µg/L | — | 1.2 m | 2024 |
| Kosobudno | LW20363 | 60 µg/L | 17 µg/L | 1.8 m | 2024 |
| Kozie | LW21043 | 26 µg/L | 10 µg/L | 3.8 m | 2024 |
| Krąg | LW20657 | 85 µg/L | 23 µg/L | 0.6 m | 2026 |
| Kruklin | LW30551 | — | — | 1.1 m | 2026 |
| Kruszyńskie | LW20329 | 42 µg/L | 34 µg/L | 1.0 m | 2026 |
| Krzywa Kuta | LW30557 | 29 µg/L | — | 1.4 m | 2026 |
| Krzywe | LW30199 | 41 µg/L | — | 0.7 m | 2026 |
| Krzywe Filipowskie | LW30585 | 63 µg/L | 5.5 µg/L | 2.3 m | 2024 |
| Krzywe Wigierskie | LW30627 | 33 µg/L | — | 1.9 m | 2024 |
| Kwiecko | LW20895 | 32 µg/L | 9.3 µg/L | 3.2 m | 2024 |
| Łąckie | LW20361 | 61 µg/L | 28 µg/L | 1.7 m | 2024 |
| Lampackie | LW30191 | 56 µg/L | — | 1.2 m | 2026 |
| Lampasz | LW30192 | 42 µg/L | — | 0.8 m | 2026 |
| Łaśmiady | LW30089 | 26 µg/L | — | 2.5 m | 2026 |
| Łaźno | LW30066 | 33 µg/L | 15 µg/L | 2.4 m | 2025 |
| Łebsko | LW21045 | 133 µg/L | 98 µg/L | 0.5 m | 2026 |
| Legińskie | LW30521 | — | — | 1.1 m | 2026 |
| Łękuk | LW30097 | 47 µg/L | — | 0.7 m | 2026 |
| Lemięt | LW30569 | 40 µg/L | 16 µg/L | 1.4 m | 2025 |
| Limajno | LW30461 | 19 µg/L | 8.6 µg/L | 2.9 m | 2025 |
| Lipczyno Wielkie | LW20282 | 32 µg/L | 6.9 µg/L | 5.2 m | 2024 |
| Lipińskie | LW30243 | 18 µg/L | — | 1.9 m | 2024 |
| Litygajno | LW30070 | 30 µg/L | — | 1.1 m | 2026 |
| Liwia Łuża | LW20809 | 176 µg/L | 71 µg/L | 0.3 m | 2026 |
| Lubiatowo Pn. | LW20909 | 28 µg/L | 14 µg/L | 1.3 m | 2026 |
| Łuknajno | LW30235 | 24 µg/L | 6.0 µg/L | 2.7 m | 2025 |
| Luterskie | LW30465 | 19 µg/L | 7.4 µg/L | 2.5 m | 2025 |
| Mądrzechowskie | LW20982 | 136 µg/L | 98 µg/L | 0.7 m | 2025 |
| Mamry | LW30544 | 17 µg/L | — | 3.2 m | 2026 |
| Marąg | LW30346 | 80 µg/L | 31 µg/L | 0.9 m | 2024 |
| Mausz | LW20967 | 45 µg/L | 10 µg/L | 2.6 m | 2026 |
| Mieruńskie Wielkie | LW30010 | 36 µg/L | 16 µg/L | 1.7 m | 2024 |
| Mikaszewo | LW30658 | 29 µg/L | 9.2 µg/L | 1.6 m | 2024 |
| Mikołajskie | LW30175 | 31 µg/L | 14 µg/L | 1.8 m | 2026 |
| Mildzie | LW30358 | 53 µg/L | 31 µg/L | 1.6 m | 2025 |
| Młosino Wielkie | LW20333 | 38 µg/L | 13 µg/L | 1.6 m | 2025 |
| Necko | LW30031 | 27 µg/L | — | 2.0 m | 2026 |
| Nicemino | LW20902 | 35 µg/L | — | 1.6 m | 2026 |
| Niedack | LW20688 | 25 µg/L | 4.4 µg/L | 4.5 m | 2024 |
| Niegocin | LW30134 | 30 µg/L | — | 3.4 m | 2026 |
| Obłęskie | LW20942 | 52 µg/L | 14 µg/L | 2.4 m | 2025 |
| Okmin | LW30020 | 33 µg/L | 12 µg/L | 2.8 m | 2025 |
| Olecko Wielkie | LW30045 | 25 µg/L | 6.1 µg/L | 3.6 m | 2025 |
| Ołówka | LW30108 | 41 µg/L | — | 1.3 m | 2026 |
| Orło | LW30162 | 37 µg/L | — | 2.6 m | 2026 |
| Orzysz | LW30252 | 19 µg/L | — | 2.3 m | 2024 |
| Ostrowite | LW20299 | 18 µg/L | 3.1 µg/L | 6.3 m | 2024 |
| Ostrowo | LW20794 | 71 µg/L | 31 µg/L | 0.9 m | 2025 |
| Ostrzyckie | LW20721 | 37 µg/L | 8.2 µg/L | 1.9 m | 2026 |
| Ożewo | LW30021 | 36 µg/L | 6.5 µg/L | 4.8 m | 2025 |
| Parnowskie | LW20905 | 56 µg/L | 21 µg/L | 1.1 m | 2025 |
| Patulskie | LW20727 | 49 µg/L | 30 µg/L | 1.6 m | 2026 |
| Piaski | LW20795 | 60 µg/L | 18 µg/L | 1.7 m | 2026 |
| Piaszno | LW20312 | 16 µg/L | 4.0 µg/L | 6.9 m | 2024 |
| Pierty | LW30626 | 26 µg/L | 7.3 µg/L | 3.4 m | 2025 |
| Pierwój | LW30203 | 29 µg/L | 14 µg/L | 1.8 m | 2025 |
| Piłakno | LW30201 | 26 µg/L | 4.5 µg/L | 3.9 m | 2024 |
| Piłwąg | LW30065 | 54 µg/L | 40 µg/L | 0.6 m | 2025 |
| Pisz | LW30425 | 37 µg/L | — | 1.2 m | 2026 |
| Płaskie | LW30650 | 24 µg/L | 4.3 µg/L | 3.8 m | 2025 |
| Płęsno | LW20360 | 32 µg/L | 5.2 µg/L | 5.2 m | 2025 |
| Pobondzie | LW30603 | — | — | 2.1 m | 2026 |
| Polaszkowskie | LW20670 | 63 µg/L | 42 µg/L | 0.8 m | 2024 |
| Pomorze | LW30670 | 36 µg/L | — | 2.5 m | 2026 |
| Pozezdrze | LW30560 | 40 µg/L | — | 1.4 m | 2026 |
| Pozorty | LW20114 | 102 µg/L | 39 µg/L | 1.1 m | 2024 |
| Przytulskie | LW30110 | 26 µg/L | — | 2.5 m | 2026 |
| Przywłoczno | LW20652 | 83 µg/L | 33 µg/L | 1.0 m | 2026 |
| Raduńskie Dolne | LW20715 | 21 µg/L | 5.8 µg/L | 2.5 m | 2024 |
| Raduńskie Górne | LW20713 | 37 µg/L | 9.4 µg/L | 3.2 m | 2025 |
| Rekąty | LW30104 | 70 µg/L | — | 0.8 m | 2026 |
| Rekowo | LW20717 | 24 µg/L | 8.9 µg/L | 1.6 m | 2024 |
| Resko Przymorskie | LW20865 | 85 µg/L | 40 µg/L | 0.6 m | 2025 |
| Rospuda Augustowska | LW30030 | 63 µg/L | — | 1.3 m | 2024 |
| Rospuda Filipowska | LW30004 | 36 µg/L | 7.4 µg/L | 3.9 m | 2025 |
| Rucewo Wielkie | LW20117 | 53 µg/L | 11 µg/L | 2.5 m | 2025 |
| Ruda Woda | LW20096 | 109 µg/L | — | 1.9 m | 2026 |
| Rydwągi | LW30503 | 85 µg/L | 29 µg/L | 1.1 m | 2025 |
| Rydzówka | LW30527 | 32 µg/L | 6.3 µg/L | 2.4 m | 2025 |
| Sajenek | LW30036 | 65 µg/L | — | 1.1 m | 2024 |
| Sajno | LW30037 | 32 µg/L | — | 3.3 m | 2026 |
| Salęt | LW30499 | 47 µg/L | 34 µg/L | 0.8 m | 2024 |
| Sambród | LW20095 | 82 µg/L | 73 µg/L | 0.5 m | 2025 |
| Sarbsko | LW21047 | 134 µg/L | 61 µg/L | 0.6 m | 2026 |
| Schodno | LW20469 | 49 µg/L | 37 µg/L | 1.6 m | 2025 |
| Sedraneckie | LW30043 | — | — | 3.1 m | 2026 |
| Sejwy | LW30662 | 45 µg/L | 25 µg/L | 1.8 m | 2025 |
| Selmęt Wielki | LW30047 | 32 µg/L | — | 1.7 m | 2026 |
| Serwy | LW30652 | 30 µg/L | — | 3.3 m | 2026 |
| Sianowskie | LW21034 | — | 16 µg/L | 1.5 m | 2026 |
| Skąpe | LW20926 | 25 µg/L | 6.3 µg/L | 2.0 m | 2026 |
| Skiertąg | LW20097 | 100 µg/L | 80 µg/L | 0.5 m | 2024 |
| Skotawsko Wielkie | LW21000 | 72 µg/L | 21 µg/L | 1.5 m | 2026 |
| Słupinko | LW20495 | 119 µg/L | 79 µg/L | 0.7 m | 2026 |
| Sobąckie | LW20663 | 42 µg/L | 27 µg/L | 1.2 m | 2025 |
| Sołtmany | LW30548 | 25 µg/L | 11 µg/L | 1.5 m | 2025 |
| Somińskie | LW20327 | 69 µg/L | 30 µg/L | 0.9 m | 2026 |
| Spore | LW10527 | 17 µg/L | 4.2 µg/L | 3.8 m | 2024 |
| Stare Orle | LW21055 | 45 µg/L | 18 µg/L | 1.1 m | 2025 |
| Stręgiel | LW30562 | 37 µg/L | — | 0.9 m | 2026 |
| Studnica | LW10518 | 42 µg/L | 23 µg/L | 1.7 m | 2026 |
| Studzieniczne | LW30032 | 32 µg/L | — | 3.2 m | 2026 |
| Studzieniczno | LW20346 | 39 µg/L | 15 µg/L | 2.1 m | 2024 |
| Studzieniczno | LW20931 | 33 µg/L | 19 µg/L | 2.1 m | 2026 |
| Sudomie | LW20483 | 73 µg/L | 38 µg/L | 1.1 m | 2026 |
| Sumińskie | LW20697 | 43 µg/L | 21 µg/L | 1.2 m | 2026 |
| Sumowo Bakałarzewskie | LW30012 | 61 µg/L | 20 µg/L | 1.7 m | 2025 |
| Sunowo | LW30118 | 21 µg/L | — | 2.8 m | 2024 |
| Święcajty | LW30545 | 20 µg/L | — | 1.2 m | 2024 |
| Szejpiszki | LW30665 | 42 µg/L | 22 µg/L | 1.4 m | 2025 |
| Szelment Mały | LW30607 | — | — | 2.9 m | 2026 |
| Szelment Wielki | LW30606 | — | — | 2.6 m | 2026 |
| Szóstak | LW30093 | — | — | 2.1 m | 2026 |
| Sztabinki | LW30673 | 21 µg/L | 4.9 µg/L | 4.5 m | 2025 |
| Sztynorckie | LW30537 | 67 µg/L | 62 µg/L | 0.6 m | 2026 |
| Szurpiły | LW30591 | 42 µg/L | 4.6 µg/L | 3.0 m | 2025 |
| Szwałk Mały | LW30064 | 42 µg/L | — | 0.6 m | 2026 |
| Szwałk Wielki | LW30063 | 44 µg/L | — | 0.8 m | 2026 |
| Szymon | LW30156 | 38 µg/L | 16 µg/L | 0.9 m | 2025 |
| Tajty | LW30131 | 35 µg/L | — | 0.8 m | 2026 |
| Tauty | LW30362 | 46 µg/L | — | 0.7 m | 2026 |
| Tobołowo | LW30024 | — | — | 2.1 m | 2026 |
| Tonka | LW30361 | 85 µg/L | 83 µg/L | 0.4 m | 2025 |
| Trackie | LW30456 | 54 µg/L | 50 µg/L | 0.8 m | 2024 |
| Trzebiechowo | LW20871 | 58 µg/L | 57 µg/L | 0.7 m | 2025 |
| Trzebielsk | LW20315 | 18 µg/L | 6.0 µg/L | 5.3 m | 2025 |
| Trzemeszno | LW20364 | 99 µg/L | 79 µg/L | 0.7 m | 2025 |
| Tuchlin | LW30238 | 37 µg/L | — | 0.8 m | 2026 |
| Tuchomskie | LW20742 | 208 µg/L | 103 µg/L | 0.7 m | 2025 |
| Tumiańskie | LW30415 | 32 µg/L | — | 1.3 m | 2026 |
| Ukiel | LW30402 | 32 µg/L | 6.4 µg/L | 2.8 m | 2025 |
| Umląg | LW30450 | 164 µg/L | — | 0.6 m | 2026 |
| Wdzydze Pd. | LW20503 | 28 µg/L | 16 µg/L | 1.9 m | 2024 |
| Wdzydze Pn. | LW20500 | 46 µg/L | 16 µg/L | 1.6 m | 2024 |
| Węgorzyno | LW20962 | 40 µg/L | 14 µg/L | 2.3 m | 2026 |
| Wieckie | LW20461 | 48 µg/L | 6.5 µg/L | 3.3 m | 2025 |
| Wiejskie | LW20311 | 24 µg/L | 7.6 µg/L | 4.3 m | 2025 |
| Wielatowo | LW20870 | 37 µg/L | — | 0.6 m | 2026 |
| Wielki Ocypel | LW20527 | 52 µg/L | 17 µg/L | 1.9 m | 2026 |
| Wielochowskie | LW90142 | 40 µg/L | 8.7 µg/L | 2.5 m | 2024 |
| Wierzbowskie | LW30486 | 45 µg/L | — | 1.1 m | 2026 |
| Wierzchowo | LW10520 | 36 µg/L | 9.9 µg/L | 3.0 m | 2026 |
| Wierzysko | LW20647 | 502 µg/L | 105 µg/L | 0.5 m | 2025 |
| Wigry | LW30616 | 31 µg/L | 7.0 µg/L | 2.5 m | 2025 |
| Wiżajny | LW30579 | 33 µg/L | — | 1.5 m | 2026 |
| Wojnowo | LW30147 | 39 µg/L | — | 1.1 m | 2026 |
| Wuksniki | LW30359 | 43 µg/L | 8.1 µg/L | 3.0 m | 2026 |
| Wydmińskie | LW30100 | 32 µg/L | 15 µg/L | 1.4 m | 2024 |
| Wysokie | LW21059 | 39 µg/L | 32 µg/L | 0.8 m | 2024 |
| Wytoczno | LW20323 | 88 µg/L | 28 µg/L | 1.7 m | 2024 |
| Zagnanie | LW20650 | 268 µg/L | 38 µg/L | 1.4 m | 2025 |
| Żarnowieckie | LW21049 | 58 µg/L | 5.5 µg/L | 3.1 m | 2025 |
| Zduńskie | LW20706 | 65 µg/L | 63 µg/L | 0.6 m | 2024 |
| Zelwa | LW30685 | — | — | 4.5 m | 2026 |
| Żubrowo | LW30631 | — | — | 2.7 m | 2026 |
Frequently asked questions
- How many named lakes are in Northern Poland?
- 250 named lakes in Northern Poland, Poland, have official phosphorus, chlorophyll-a, and Secchi, 2024–2026. Values are the authority's measurements, shown as reported.
- Where do the Northern Poland readings come from?
- Northern Poland pages show official phosphorus, chlorophyll-a, and Secchi from the publishing authority, with the year each was taken.
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