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Light pollution in Poland

73 cities · estimated Bortle class at each city centre
8 of 73 cities read Bortle 8–9 · 29 of 73 cities read Bortle 7–8 · 36 of 73 cities read Bortle 6–7. The darkest city centre on the list is Bełchatów (Bortle 6–7).
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Cities, brightest first

#CityBortle (est.)Brightness2 classes darker
1Warsaw8–9255~25 km WNW
2Katowice8–9255~25 km NNE
3Pruszków8–9255~25 km NW
4Poznań8–9255~25 km S
5Kraków8–9255~25 km SSW
6Dąbrowa Górnicza8–9255~25 km NNW
7Wrocław8–9255~25 km E
8Łódź8–9255~25 km WNW
9Gdańsk7–8255~25 km ENE
10Gliwice7–8255~25 km N
11Legionowo7–8255~25 km WSW
12Lublin7–8255~25 km NNW
13Jaworzno7–8253~25 km E
14Bydgoszcz7–8255~25 km ESE
15Szczecin7–8255~25 km NNW
16Jastrzębie Zdrój7–8242~25 km NNW
17Tarnowskie Góry7–8252~25 km NNE
18Gdynia7–8255~25 km E
19Bielsko-Biala7–8255~25 km ESE
20Rybnik7–8254~25 km NNW
21Kielce7–8255~25 km ESE
22Radom7–8255~25 km E
23Białystok7–8255~25 km ENE
24Toruń7–8255~25 km ENE
25Częstochowa7–8255~25 km W
26Rzeszów7–8255~25 km SSE
27Tarnów7–8255~25 km SE
28Kalisz7–8255~25 km NNE
29Płock7–8255~25 km W
30Opole7–8255~25 km NE
31Włocławek7–8255~25 km ESE
32Nowy Sącz7–8254~25 km SSE
33Legnica7–8255~25 km SSW
34Zielona Góra7–8255~25 km WSW
35Olsztyn7–8255~25 km SSE
36Ostrów Wielkopolski7–8255~25 km SW
37Inowrocław7–8255~25 km NNE
38Kędzierzyn-Koźle6–7223~25 km NNE
39Świdnica6–7255~25 km SSW
40Piotrków Trybunalski6–7247~25 km SSE
41Gorzów Wielkopolski6–7255~25 km SSW
42Wałbrzych6–7234~25 km WNW
43Tczew6–7255~25 km W
44Gniezno6–7242~25 km NNW
45Siedlce6–7255~25 km SSW
46Stalowa Wola6–7254~25 km E
47Konin6–7240~25 km SW
48Ostrowiec Świętokrzyski6–7247~25 km E
49Mielec6–7255~25 km NE
50Grudziądz6–7255~25 km NW
51Racibórz6–7251~25 km NE
52Ostrołęka6–7255~25 km NW
53Leszno6–7252~25 km W
54Elbląg6–7253~25 km NNE
55Lubin6–7255~25 km W
56Zamość6–7255~25 km SW
57Tomaszów Mazowiecki6–7255~25 km E
58Głogów6–7255~25 km NNW
59Biała Podlaska6–7249~25 km NNW
60Słupsk6–7255~25 km N
61Suwałki6–7255~25 km SE
62Przemyśl6–7255~25 km SSW
63Koszalin6–7255~25 km NNW
64Jelenia Góra6–7248~25 km WSW
65Zawiercie6–7215~25 km N
66Stargard6–7236~25 km N
67Łomża6–7255~25 km S
68Starachowice6–7252~25 km SSE
69Chełm6–7214~25 km N
70Piła6–7255~25 km NNW
71Ełk6–7247~25 km W
72Tarnobrzeg6–7238~25 km NE
73Bełchatów6–7141~25 km SE

Brightness is the NASA VIIRS Black Marble 2016 value at the city centre on a 0–255 scale; 255 is saturated. Cities are ordered by estimated sky brightness, which also counts the light within 30 km.