2017-2023

World's most polluted cities

Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)

2023

World Air Quality Report

NEWSROOM
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PM2.5 legend

0-5

Meets WHO guideline

5.1-10

Exceeds by 1 to 2 times

10.1-15

Exceeds by 2 to 3 times

15.1-25

Exceeds by 3 to 5 times

25.1-35

Exceeds by 5 to 7 times

35.1-50

Exceeds by 7 to 10 times

>50.1

Exceeds by over 10 times

Rank
City
2023 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2022 2021 2020 2019 2018 2017
1 Czech Republic
Spešov, Czech Republic
20 29.1 33.6 26.2 19.9 12.1 11.5 9 11.1 22.4 17 17.1 35 -- -- -- -- -- --
2 Czech Republic
Hnevosice, Czech Republic
18.3 -- -- 13.3 25.9 19.4 15.9 12.2 13.6 17.8 14.4 18 28.4 -- -- -- -- -- --
3 Czech Republic
Karviná, Czech Republic
17.4 17.8 23.7 20.7 25.5 16.8 15.5 12 13 15.4 12.1 10.9 25.4 19.2 33 18.3 22.1 27.1 24.6
4 Czech Republic
Rychvald, Czech Republic
16.5 18.4 23 19.3 19.9 14.7 13.1 11.4 12.1 14.4 13.1 13 24.2 19.7 27.1 -- 17.1 -- --
5 Czech Republic
Dolní Lutyně, Czech Republic
15.9 19.1 23.4 20.8 18.8 13.7 11.7 10.1 10.9 12.5 12.7 11.5 25.2 20.7 22.8 20.9 27.7 35.8 32.3
6 Czech Republic
Havířov, Czech Republic
15.9 17.2 22.6 18.3 19.4 15.5 13.8 11.6 11.8 13 11.1 11.7 25.8 18.3 19.6 18 20.3 28.8 26.7
7 Czech Republic
Hodonín, Czech Republic
15.6 12.3 17.6 14.4 13.1 -- -- -- 22.2 21 10.9 10.2 20 11.8 9.9 -- 14.8 16.6 17.8
8 Czech Republic
Rostěnice-Zvonovice, Czech Republic
15.5 20.6 21.9 20.2 18.1 13.7 12.6 9.7 12.8 14.3 10.5 11.3 21 -- -- -- -- -- --
9 Czech Republic
Český Těšín, Czech Republic
15.3 16.7 21.7 17 18 14.8 14 11.6 12.5 14.1 10.6 10.1 22.9 -- -- -- -- -- --
10 Czech Republic
Frydlant, Czech Republic
15 16.2 25.4 21.2 19 16.5 14.4 9.9 10.2 12.7 10.8 11.6 14.9 20.2 22.2 19.3 19.1 -- --
11 Czech Republic
Děčín, Czech Republic
14.8 16.4 20.8 17.4 14.8 13.2 12.6 9.9 11.2 13.4 15.2 13.1 20.3 16 17.1 16.4 17.8 23.1 23
12 Czech Republic
Tesin, Czech Republic
14.7 16.8 28.5 22.6 17.5 14 12.4 9.7 9.3 11.4 9.3 10.2 35.8 17.6 19.5 17.9 20 29.6 27.2
13 Czech Republic
Ostrava, Czech Republic
14.6 18.1 22.9 17.5 17.5 12.8 10.9 8.6 9.7 12.2 11.8 10.9 22.8 18.7 19.6 16.8 20.9 30.1 27.8
14 Czech Republic
Frýdek-Místek, Czech Republic
14.2 16.5 20.5 18.1 17.3 14.1 12.4 10.7 11 11.5 9.6 9.5 20.2 17.2 17.8 16.2 17.6 26.9 25
15 Czech Republic
Studénka, Czech Republic
14 14.9 19.9 16.8 15.2 12.1 12 11.2 11.2 11.5 10.6 11.3 21.2 15.8 17.2 16.2 18 25.4 24.3
16 Czech Republic
Olomouc, Czech Republic
13.9 13.4 19.7 18.2 16.4 11.2 11.3 9.5 10 13.2 13 10.7 20.1 14.6 17.7 15.8 16.1 19 20.4
17 Czech Republic
Klatovy, Czech Republic
13.6 15.8 28.7 16.5 14.8 10.6 5.8 6.4 8.9 10.7 10 7.1 14.7 16.7 20.9 -- 10.8 -- --
18 Czech Republic
Třinec, Czech Republic
13.5 16.2 21.1 17.3 17.3 12.6 11.7 9.9 10.4 11.3 8.4 8.5 17.5 17.5 18.2 15.1 18.2 26.5 26.7
19 Czech Republic
Přerov, Czech Republic
13.5 15.1 20.2 16.1 13.6 11.5 11.3 11.1 10.2 12.7 10.6 10.1 20.3 15.5 16.2 15.5 17.9 22.9 24.4
20 Czech Republic
Valasske Mezirici, Czech Republic
13.5 15.5 20.8 17.5 15.7 11.7 11.4 9.9 9.6 11.3 9.8 9.9 18.8 15.4 17.4 15 17.2 24.8 24.9
21 Czech Republic
Rožnov pod Radhoštěm, Czech Republic
13.4 17.1 25.4 19.6 17.5 12.1 10.4 8.8 9 10.3 9.6 8.2 19.3 16.8 -- -- -- -- --
22 Czech Republic
Bělotín, Czech Republic
13.2 13.8 19 15.3 14.6 11.9 11.1 10.5 10.2 12.4 8.9 9.9 18.7 15.1 16.5 -- 17.6 23.7 23.4
23 Czech Republic
Opava, Czech Republic
12.9 15.5 18.3 15.6 15.9 12.6 10.2 8.9 9.2 11.4 10.3 8.7 18.7 15.2 15.8 14.9 16.9 24.5 22.7
24 Czech Republic
Moravska Trebova, Czech Republic
12.9 18 21.7 16.3 13.9 10.7 10.8 9 8.5 9.8 10.7 8.3 17.7 15.8 17 16.2 18.9 23 18.9
25 Czech Republic
Zlín, Czech Republic
12.7 15.5 21.3 16.1 13.9 10 9.7 9.1 9 10.4 9 9.6 18.9 15.7 14.7 13 16.5 21.7 21.3
26 Czech Republic
Beroun, Czech Republic
12.4 13.8 18.2 14.3 12.4 12.1 12.6 9.6 9.3 11.6 11.9 8.3 15.6 14.2 15.3 14 15.6 22.5 18.8
27 Czech Republic
Choceň, Czech Republic
12.4 16 18.3 15.3 15.2 11.7 11.7 7.1 9.6 11.6 9.1 8.8 15.5 14.2 -- -- -- -- --
28 Czech Republic
Nizbor, Czech Republic
12.2 -- 10.1 16 16.1 13.5 14 7.1 11.7 12.9 9.5 7.7 14.4 -- -- -- -- -- --
29 Czech Republic
Teplice, Czech Republic
12.2 13.7 17.7 14 12.5 10.4 11.1 8.4 9.6 12 11.8 10.1 16 13.3 13.3 13.4 14.2 19.1 18.8
30 Czech Republic
Hradec Kralove, Czech Republic
12 13.8 17.8 12.9 12.9 11.1 11.8 9.5 9.6 12 11.2 7.4 14.2 13.3 14.5 13.7 14.8 19.7 19
31 Czech Republic
Znojmo, Czech Republic
11.9 14.3 16.2 14.1 12.2 10.6 10.4 8.7 9.4 11.7 10.9 9.3 16 12.2 11.8 11.9 14.2 19.7 17.4
32 Czech Republic
Měňany, Czech Republic
11.8 11.5 16 13.4 10.5 11.8 13.3 11.1 11.2 10.9 11.3 8.5 12.8 13.6 -- -- -- -- --
33 Czech Republic
Pardubice, Czech Republic
11.7 13.9 17.7 11.8 13.1 11.6 11.3 8.8 8.2 12.5 10.1 7.9 14.6 12.8 13.8 12.5 14.7 19.4 18.3
34 Czech Republic
Štětí, Czech Republic
11.7 13.4 20.9 14.3 12.7 10.1 9.8 7.7 7.6 10 10.8 8.5 14.6 15 13 -- 16.3 -- --
35 Czech Republic
Mladá Boleslav, Czech Republic
11.6 14.1 16.9 12.3 10.9 10.6 11.3 8.5 8.9 11 10.6 8.4 15.5 13.1 13.4 13 15.6 19.1 15.9
36 Czech Republic
Rožďalovice, Czech Republic
11.6 13.9 18.3 12.9 11.6 10.5 10.2 8.5 8.3 9.4 9.5 10.1 16 12.7 13.4 13.6 13 19.2 18.6
37 Czech Republic
Brno, Czech Republic
11.6 13.9 15.9 13.8 11.4 9.3 9.2 7.7 8.4 10.6 10.4 10 18.1 13.9 15.4 13.5 15.7 20.4 18.8
38 Czech Republic
Most, Czech Republic
11.6 10.4 15.7 12.1 11.9 10.9 12.7 9.3 10.6 13.1 10.5 6.4 16.2 12.9 14.1 13.8 15.1 21.7 18.3
39 Czech Republic
Mariánské Radčice, Czech Republic
11.4 11.5 14.4 11.5 10.9 10.2 11.9 9 10.6 11.8 10 8.5 16.5 13.3 14.5 14.9 15.5 20.5 18.7
40 Czech Republic
Kolín, Czech Republic
11.3 11.3 18.3 13.2 13.4 11.2 9.9 7.1 8.3 9.7 10.7 8.2 15.5 12.6 -- -- -- -- --
41 Czech Republic
Usti nad Labem, Czech Republic
11.3 13.4 17.3 13.7 11.9 9.7 10.9 7 8.1 10.3 10.6 8.4 15 13.8 12.9 12 14.1 18.3 17
42 Czech Republic
Kutná Hora, Czech Republic
10.8 10.7 16.4 12 11.9 10.8 10.6 8.1 8.4 9.9 9.6 7.6 12.6 13 16 -- 12 -- --
43 Czech Republic
Liberec, Czech Republic
10.5 10.2 14.5 11 12.1 10.6 10.7 8.9 9 10.4 9.3 7.8 12 11.7 11.4 11.6 12.5 18.4 15.8
44 Czech Republic
Kladno, Czech Republic
10.4 9.9 14.8 10.7 10.8 11 10.6 7.9 8.8 10.6 9.7 6.4 15.3 13.1 12 12.3 12.2 19 18
45 Czech Republic
Kadaň, Czech Republic
10.3 9.1 13.2 10.9 9.8 11.6 12.4 8.7 8.8 12.1 9.3 5.9 12.5 11.5 11.9 11.2 12.8 18.8 14.8
46 Czech Republic
Litoměřice, Czech Republic
10.3 10.2 15.4 12.4 11.1 10.3 10.6 7.7 9.3 10.4 9.8 7.9 16.4 16.9 19 12.4 -- -- --
47 Czech Republic
Kuchařovice, Czech Republic
10.2 9.8 12.8 12.5 9 9.1 9.7 9.9 8.8 11.1 9.5 9.2 8.9 11.4 -- -- -- -- --
48 Czech Republic
Kroměříž, Czech Republic
10.2 11.3 15.1 12.5 11.7 9.1 9 8.4 8.4 10.2 6.9 5.7 13.8 11.6 13.2 12 14.3 20.8 18.5
49 Czech Republic
Chomutov, Czech Republic
10.1 9.5 12.5 10.2 10.6 10.6 10.5 7.6 8.3 10.4 9.8 7.8 18.7 11.8 11.3 11.9 -- -- --
50 Czech Republic
Sedlec, Czech Republic
10 10.2 12.6 12.4 10.6 9.2 9.4 9 8.6 10.4 8.1 6.6 12.9 10.5 10.5 10.3 12.6 18.6 16.2

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