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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
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 |  Dudince, Slovakia | 20 | 34.3 | 33.1 | 24.2 | 14.4 | 9.8 | 10.1 | 11.4 | 12.3 | 10.9 | 14.4 | 19.5 | 47.1 | -- | -- | -- | -- | -- | -- |
| 2 | Veľká Ida, Slovakia | 20 | 20.8 | 29.1 | 22.7 | 21.8 | 24.4 | 17.7 | 16.8 | 15.8 | 16.5 | 14.7 | 14.1 | 25.9 | -- | -- | -- | -- | -- | -- |
| 3 | Jelsava, Slovakia | 19.3 | 28.5 | 36.6 | 21.7 | 17.1 | 13.2 | 8.2 | 9.7 | 11 | 9.7 | 14.5 | 22.9 | 39.7 | 21.3 | 23.7 | 19 | 21.4 | 24.3 | 26.7 |
| 4 | Krompachy, Slovakia | 17.2 | 22.5 | 35.1 | 20.3 | 12.8 | 12.3 | 12 | 12.8 | 12.4 | 10 | 10.9 | 10.4 | 36.8 | 13.2 | 19.3 | 16.4 | 18.1 | 18.9 | 20.7 |
| 5 | Žarnovica, Slovakia | 16.5 | 27.2 | 29.7 | 22.8 | 14 | 11.6 | 11.5 | 11.4 | 11.4 | 11.3 | 11 | -- | -- | 19.6 | 19.3 | -- | -- | -- | -- |
| 6 | Kosice, Slovakia | 16.2 | 18.4 | 26.7 | 19.3 | 15.1 | 14.9 | 15 | 15 | 13.6 | 11.3 | 12.8 | 12.2 | 21 | 17.1 | 19.2 | 17 | 19.4 | 17.6 | 21.2 |
| 7 | Presov, Slovakia | 16 | 17.3 | 24.8 | 18.4 | 14.6 | 13.9 | 14.4 | 15.4 | 16.4 | 12.4 | 11.8 | 11.8 | 21.8 | 17.1 | 18.6 | 16.1 | 18.3 | 20.2 | 24.3 |
| 8 | Lucenec, Slovakia | 15.5 | 21.4 | 28.3 | 17.4 | 12.5 | 9.5 | 10.1 | 11 | 12.4 | 13 | 12.8 | 12.7 | 26.2 | -- | -- | -- | -- | -- | -- |
| 9 | Cadca, Slovakia | 15.1 | 18.9 | 27.9 | 17.7 | 15.1 | 10.7 | 10.6 | 10 | 9.8 | 10.4 | 10.1 | 13.7 | 26.9 | -- | -- | -- | -- | -- | -- |
| 10 | Ruzomberok, Slovakia | 14.9 | 23.5 | 33.9 | 16.4 | 11.3 | 9.8 | 11.5 | 10.8 | 9.1 | 9.2 | 10.2 | 9.9 | 24.4 | 17.3 | 18.3 | 19.6 | 18.5 | 20.7 | 24.4 |
| 11 | Nad Jazerom, Slovakia | 14.8 | 16.4 | 22.5 | 17.5 | 11.9 | 10.8 | 12.2 | 13.6 | 14.8 | 12.6 | 12.3 | 11.9 | 21.4 | 10.3 | 18.4 | 15.1 | 14.4 | -- | -- |
| 12 | Martin, Slovakia | 14.7 | 16.4 | 25.5 | 16.3 | 12.8 | 11.2 | 13.2 | 13.4 | 11.3 | 12.8 | 11.5 | 10.4 | 22.4 | 17.3 | 20.6 | 15.7 | 16.1 | 18 | 22.1 |
| 13 | Zilina, Slovakia | 14.6 | 18.5 | 24.8 | 18.3 | 13.2 | 10.8 | 11.2 | 11.7 | 10.8 | 11 | 10.3 | 10.3 | 25 | 21.5 | 19.3 | 17.2 | 18.6 | 21.8 | 25.9 |
| 14 | Trebišov, Slovakia | 14.3 | 18 | 24.8 | 16.9 | 12.2 | 10.2 | 9.4 | 13 | 14.5 | 11.2 | 11.2 | 11.4 | 19.3 | 16.1 | 17 | -- | -- | -- | -- |
| 15 | Strazske, Slovakia | 14.1 | 16.6 | 22.2 | 15.9 | 12 | 12.7 | 11.5 | 12.1 | 13.2 | 11.7 | 10.9 | 10.6 | 20.9 | 16.8 | 17.5 | 15.8 | 18.7 | 19.5 | 21.6 |
| 16 | Trnava, Slovakia | 14 | 14.6 | 16.4 | 15.2 | 13.3 | 13.1 | 14.6 | 15.7 | 13.1 | 14 | 11.8 | 8.6 | 17.6 | 13.4 | 15.8 | 16.3 | 16.7 | 20.5 | 16.8 |
| 17 | Puchov, Slovakia | 13.9 | 18.5 | 22.3 | 17.3 | 11.8 | 10.1 | 10.4 | 10.9 | 9.8 | 8.7 | 9.8 | 12.3 | 25.3 | -- | -- | -- | -- | -- | -- |
| 18 | Senec, Slovakia | 13.6 | 16.7 | 17.5 | 14.9 | 12.1 | 12.3 | 13.5 | 15.6 | 13.7 | 13.6 | 10 | 7.6 | 14.9 | -- | -- | -- | -- | -- | -- |
| 19 | Bardejov, Slovakia | 13.5 | 15.5 | 22.1 | 15.2 | 11.6 | 11 | 11.6 | 11.2 | 12.9 | 11.4 | 10.5 | 10.9 | 18.7 | 14.8 | 15.6 | -- | -- | -- | -- |
| 20 | Humenne, Slovakia | 13.5 | 13.2 | 21.6 | 16 | 11.2 | 11.3 | 11 | 11.2 | 16.3 | 10.1 | 11.1 | 8.8 | 20.7 | 12.2 | 14.4 | 11.7 | 14 | 19.1 | 21.7 |
| 21 | Senica, Slovakia | 13.2 | 15.9 | 18.3 | 16.3 | 13.6 | 12.6 | 14.6 | 11.7 | 13.8 | 12 | 9.1 | 6.4 | 15.6 | 7 | 14.9 | 13.8 | 14.3 | 16.7 | 16.5 |
| 22 | Vranov nad Toplou, Slovakia | 13 | 14.4 | 21.7 | 14.1 | 10 | 11.2 | 10.4 | 11.5 | 13.7 | 10 | 10.1 | 11 | 18.5 | 15.1 | 16.6 | 14.4 | 16.2 | 18.7 | 19.7 |
| 23 | TopolnÃky, Slovakia | 13 | 15.4 | 18.5 | 17.5 | 14.9 | 11 | 10.7 | 11.4 | 10.1 | 13.1 | 10.3 | 7.6 | 17.4 | -- | -- | -- | -- | -- | -- |
| 24 | Zvolen-Motova, Slovakia | 12.9 | 17.6 | 20.3 | 13.7 | 9.9 | 9.4 | 10.3 | 10.9 | 11.1 | 10.1 | 9.6 | 11.2 | 20.8 | 15 | 15.1 | 12.5 | 15.2 | 15.9 | 17.7 |
| 25 | Chrabrany, Slovakia | 12.8 | 15.7 | 18.4 | 13.5 | 10 | 11.4 | 12.4 | 14.8 | 12.7 | 11.5 | 9.4 | 7.7 | 15 | -- | -- | -- | -- | -- | -- |
| 26 | Hnúšťa, Slovakia | 12.6 | 19.6 | 21.3 | 14.4 | 10.5 | 8.3 | 8.6 | 9 | 9.4 | 8 | 7.5 | 12.5 | 22.9 | 14.4 | 16 | 14 | 16.2 | 18.9 | 19 |
| 27 | Malacky, Slovakia | 12.3 | 16.7 | 18 | 15.7 | 11.7 | 10 | 10.2 | 13 | 12.4 | 9.8 | 7.8 | 7.6 | 14.8 | 14.1 | 14.9 | 16.8 | 16.1 | 18.1 | 17.2 |
| 28 | Nitra, Slovakia | 12.3 | 15.1 | 16.4 | 12.1 | 10.7 | 10.2 | 11.8 | 13.7 | 11.5 | 11.9 | 9.2 | 8.7 | 16.1 | 10.1 | 15.1 | 14.1 | 15.1 | 17.6 | 17 |
| 29 | Prievidza, Slovakia | 12.3 | 15.5 | 18.6 | 14.4 | 10.2 | 8.4 | 9.1 | 10.2 | 9.9 | 10 | 9 | 11.6 | 20.9 | 9.2 | 15.9 | 15.9 | 15.5 | 18.2 | 18.4 |
| 30 | Ganovce, Slovakia | 12.2 | 14.5 | 16.8 | 12.1 | 12.2 | 11.3 | 13.3 | 12.8 | 13.4 | 11 | 8.5 | 7.1 | 14.1 | -- | -- | -- | -- | -- | -- |
| 31 | Stupava, Slovakia | 12.1 | 18.1 | 18.8 | 16.6 | 14.2 | 10.6 | 8.6 | 7.7 | 10.1 | 9.5 | 5.7 | 7.5 | 16.4 | 16.3 | 23.8 | -- | -- | -- | -- |
| 32 | Trencin, Slovakia | 12.1 | 14.6 | 20 | 16.6 | 9.9 | 5.6 | 10.1 | 9.7 | 8.8 | 9 | 10.3 | 9.1 | 19 | 14.1 | 15.1 | 15.6 | 17.9 | 19.8 | 13.2 |
| 33 | Liptovsky Mikulas, Slovakia | 12.1 | 17.5 | 23 | 12.4 | 9.5 | 8.4 | 9.5 | 9.7 | 10.1 | 9.9 | 8.3 | 7.2 | 21.1 | -- | -- | -- | -- | -- | -- |
| 34 | Banska Bystrica, Slovakia | 12 | 15.1 | 23 | 14.7 | 9.3 | 8.5 | 9.3 | 9.7 | 10.1 | 8.8 | 7.6 | 8 | 20.5 | 12.3 | 16.5 | 15.8 | 15.3 | 17.6 | 19.7 |
| 35 | Novaky, Slovakia | 11.9 | 14 | 19.1 | 13.4 | 10.1 | 8.5 | 9.8 | 11 | 10.7 | 9.7 | 7.8 | 8.9 | 20.8 | 20.2 | 17.4 | 16.3 | 11.4 | -- | -- |
| 36 | Bratislava, Slovakia | 11.8 | 13.1 | 15.3 | 13.3 | 10.4 | 10.3 | 11.8 | 12.7 | 11.8 | 10.6 | 9.7 | 7.4 | 14.9 | 13.4 | 13.8 | 14.2 | 13.6 | 17.2 | 14.9 |
| 37 | Sereď, Slovakia | 11.4 | 14.3 | 15.6 | 11.9 | 12 | 10.1 | 10.6 | 10.9 | 10.8 | 11.4 | 7.9 | 6.9 | 15 | -- | -- | -- | -- | -- | -- |
| 38 | Petrzalka, Slovakia | 10.8 | 12.6 | 14.7 | 13 | 9.6 | 10.5 | 11.4 | 11.6 | 10.4 | 9.1 | 5.5 | 7.4 | 13.8 | 13.6 | 14.1 | 14.2 | 13.5 | -- | -- |
| 39 | Handlova, Slovakia | 10.8 | 11.7 | 18.2 | 13.4 | 8.6 | 9.6 | 7.8 | 9.4 | 9.8 | 8.1 | 6.6 | 8.4 | 19.3 | 11 | 17.9 | 16.2 | 13.8 | 16.7 | 18 |
| 40 | Ziar nad Hronom, Slovakia | 10.6 | 13.3 | 14.4 | 11 | 9.1 | 8 | 9.6 | 10.5 | 9.7 | 10 | 7.8 | 7.7 | 15.8 | 12 | 12.7 | 12.3 | 13.3 | 16.6 | 15.5 |
| 41 | Pezinok, Slovakia | 10.2 | 14.1 | 15.2 | 11.5 | 6.6 | 7 | 9 | 9.5 | 8.7 | 7.6 | 6.6 | 9.6 | 17.9 | 12.9 | 10.3 | -- | -- | -- | -- |
| 42 | Poprad, Slovakia | 8 | 6.8 | 9.1 | 6.5 | 7.8 | 8.3 | 9.8 | 9.9 | 9.5 | 8.4 | 5.8 | 4.9 | 8.8 | 6 | 8.3 | 9.5 | 11.2 | -- | -- |
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