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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 |  Mollet del Valles, Spain | 16.1 | 24.2 | 28.2 | 17.1 | 10.7 | 12.6 | 13.3 | 11.9 | 12.6 | 12.1 | 13.8 | 14 | 23.2 | 14.5 | 34.7 | -- | -- | -- | -- |
| 2 | Santa Perpetua de Mogoda, Spain | 16.1 | 17.4 | 15.7 | 17.7 | 16 | 14.2 | 16.1 | 19.4 | 18.2 | 14.1 | 14.5 | 15.1 | 15.8 | 16.6 | 16.4 | -- | -- | -- | -- |
| 3 | Granollers, Spain | 15.1 | 18.2 | 18.2 | 17.4 | 15.1 | 13.1 | 14.6 | 17.9 | 16.3 | 12.5 | 14.2 | 13.5 | 13.5 | -- | -- | -- | -- | -- | -- |
| 4 | Teguise, Spain | 14.1 | 7.5 | 29.5 | 12.3 | 17 | 13.2 | 12 | 12.5 | 15.3 | 8.8 | 13.8 | 12.2 | 17 | -- | -- | -- | -- | -- | -- |
| 5 | Alcantarilla, Spain | 13.9 | 14.5 | 17.3 | 14.6 | 14.6 | 10.1 | 10.9 | 15.2 | 12.7 | 12.6 | 15.6 | 16.2 | 14.4 | 13.8 | 13.6 | 13.8 | -- | -- | -- |
| 6 | Murcia, Spain | 13.7 | 18.8 | 18.9 | 11.2 | 9.8 | 9.2 | 10.5 | 14.1 | 11.1 | 13.4 | 12.4 | 12.6 | 22.4 | 15.2 | 15.1 | 16.1 | -- | -- | -- |
| 7 | Cuenca, Spain | 13.5 | 10.1 | 15.6 | 11.7 | 10.3 | 13 | 14.5 | 18 | 16.8 | 15.7 | 13 | 11.1 | 12.5 | 13 | 9.8 | -- | -- | -- | -- |
| 8 | Cuart de Poblet, Spain | 13.3 | 5.7 | 22.1 | 15 | 13.2 | 12.8 | 13.6 | 15.8 | 11.8 | 13.9 | 12.6 | 9.6 | 13.8 | -- | -- | -- | -- | -- | -- |
| 9 | San Roque, Spain | 13 | 9 | 10.8 | 9.1 | 12.4 | 12.5 | 14 | 17 | 15.1 | 13 | 15.9 | 13.4 | 13.1 | -- | -- | -- | -- | -- | -- |
| 10 | Bailen, Spain | 12.7 | 16.9 | 17.1 | 13.3 | 11.2 | 9 | 10.2 | 11.7 | 10.3 | 8.9 | 9.2 | 13.3 | 21.5 | -- | -- | -- | -- | -- | -- |
| 11 | Los Cortijillos, Spain | 12.7 | 9.1 | 9.6 | 8.8 | 11.9 | 13.5 | 14.5 | 16.5 | 15.6 | 14.5 | 14.5 | 11.3 | 11.9 | -- | -- | -- | -- | -- | -- |
| 12 | Puebla de Alfinden, Spain | 12.6 | 15.9 | 28.1 | 13.5 | 7 | 8.1 | 11.1 | 8.8 | 7.9 | 10 | 9.2 | 7.1 | 13.4 | 15.6 | 14 | -- | -- | -- | -- |
| 13 | Reus, Spain | 12.5 | 6.5 | 11.7 | 14.3 | 12.7 | 8.8 | 10.3 | 16.5 | 16.2 | 12.9 | 13.7 | 13.9 | 11.2 | -- | -- | -- | -- | -- | -- |
| 14 | Elche, Spain | 12.5 | 15.2 | 17.7 | 11.5 | 8.8 | 10.4 | 13.6 | 15.3 | 12.3 | 13.2 | 11.1 | 8.8 | 11.6 | 13.7 | 12.7 | -- | -- | -- | -- |
| 15 | Natahoyo, Spain | 12.3 | 10.2 | 19.5 | 16.7 | 11.2 | 18.1 | 11.5 | 8.5 | 7.4 | 10.5 | 12.5 | 9.4 | 13.2 | 13.7 | 10.2 | 9.5 | 9.8 | -- | -- |
| 16 | Valdemoro, Spain | 12.3 | 14.6 | 16.9 | 9.3 | 8.1 | 8 | 10.6 | 12.1 | 13.1 | 12.1 | 11.3 | 11.9 | 19.6 | 10.8 | 11.7 | 12.1 | 11 | -- | -- |
| 17 | Cartagena, Spain | 12.2 | 13.1 | 12.1 | 11.8 | 13.7 | 10.2 | 10.4 | 13 | 12.7 | 9.1 | 12.1 | 12.4 | 13.9 | 14.3 | 9.1 | 12.2 | -- | -- | -- |
| 18 | Barreda, Spain | 12.1 | 12.4 | 21.8 | 16.2 | 16 | 14.4 | 12 | 8.8 | 9.5 | 9.8 | 11 | 9.8 | 11.5 | 14.1 | 14.6 | -- | -- | -- | -- |
| 19 | Granadilla de Abona, Spain | 12 | 9.4 | 14.8 | 10.1 | 10.7 | 9 | 8.4 | 10 | 19.1 | 10.5 | 15.9 | 10.8 | 14.1 | 11.9 | 10.9 | 11.2 | 7.5 | -- | -- |
| 20 | San Nicolas, Spain | 12 | 8.7 | 18.6 | 9.2 | 18.5 | 12.5 | 8.7 | 13.5 | 12.7 | 8 | 10.7 | 7.6 | 15.3 | 11.9 | 8.5 | 6.3 | -- | -- | -- |
| 21 | Mislata, Spain | 11.9 | -- | 20.6 | 12.8 | 10.8 | 10.4 | 11.9 | 13.9 | 11.3 | 9.8 | 10.6 | 10.1 | 13.2 | -- | -- | -- | -- | -- | -- |
| 22 | La Aljorra, Spain | 11.8 | 10.2 | 14.7 | 12.1 | 13.5 | 11.2 | 9.6 | 14.1 | 13.6 | 10.3 | 12.5 | 11.7 | 9.6 | 12.8 | 11.9 | 14 | -- | -- | -- |
| 23 | Cordoba, Spain | 11.7 | 13.2 | 17.6 | 11.3 | 10.1 | 9.4 | 10.9 | 11.5 | 10.2 | 8.4 | 9.8 | 12.8 | 15.6 | -- | -- | -- | -- | -- | -- |
| 24 | Zaragoza, Spain | 11.7 | 8 | 17.5 | 13 | 11.6 | 12.9 | 9.5 | 13.2 | 14 | 12.7 | 12.8 | 8.1 | 7.7 | 12 | 11.4 | 7.3 | -- | -- | -- |
| 25 | Sevilla, Spain | 11.5 | 12.3 | 13.1 | 9.2 | 9.6 | 9.7 | 9.7 | 11.3 | 12.3 | 9.8 | 10.9 | 12.5 | 17.6 | -- | -- | -- | -- | -- | -- |
| 26 | Barcelona, Spain | 11.5 | 11.4 | 18.6 | 11.7 | 8.2 | 10.5 | 12.4 | 11.6 | 11.7 | 9.4 | 11.1 | 9.3 | 12.1 | 13 | 13.2 | -- | -- | -- | -- |
| 27 | Picanya, Spain | 11.5 | 8.8 | 14.8 | 11.3 | 11.1 | 11.7 | 12.6 | 15.1 | 11.4 | 10.9 | 12.4 | 8.7 | 11.2 | 10.4 | -- | -- | -- | -- | -- |
| 28 | Santa Cruz de Tenerife, Spain | 11.4 | 9 | 18.6 | 10 | 13.2 | 9.6 | 10.3 | 8.2 | 13 | 6 | 13.3 | 10 | 16.6 | 12.4 | 8.6 | 11.2 | 7.4 | 6.9 | 8 |
| 29 | Albacete, Spain | 11.4 | 11 | 12.4 | 9 | 9.1 | 8.4 | 9.1 | 16.3 | 13.9 | 14.4 | 13 | 10.5 | 9.8 | 10.1 | 8.7 | 9.3 | 7.9 | -- | -- |
| 30 | Arrecife, Spain | 11.3 | 8.6 | 28.2 | 8.1 | 12.2 | 9 | 8.3 | 9 | 12.7 | 6.3 | 11 | 9 | 14.6 | 10.6 | 9.5 | -- | -- | -- | -- |
| 31 | Vigo, Spain | 11.3 | 10.6 | 18.7 | 11.5 | 10.8 | 10.2 | 12 | 9.2 | 7.7 | 7.6 | 12.2 | 11.2 | 14.6 | 9.6 | 11 | 9.4 | 10.5 | 11 | 13.4 |
| 32 | Rubi, Spain | 11.2 | 10.6 | 12 | 12.2 | 11.4 | 10.9 | 11.7 | 13.7 | 12.6 | 9.8 | 10.4 | 9.2 | 9 | -- | -- | -- | -- | -- | -- |
| 33 | Coslada, Spain | 11.2 | 10.7 | 12.5 | 8.7 | 9 | 7.7 | 10.1 | 12.7 | 10.8 | 14.3 | 12.8 | 10.8 | 15.2 | 11.3 | 13.1 | 11.7 | 12 | -- | -- |
| 34 | Algeciras, Spain | 11.1 | 10.2 | 9.3 | 8.9 | 10.7 | 11.5 | 13 | 13.5 | 14.6 | 9.6 | 10.5 | 9.2 | 12.4 | -- | -- | -- | -- | -- | -- |
| 35 | Las Palmas de Gran Canaria, Spain | 11.1 | 8.4 | 21.2 | 8.8 | 13.4 | 11.1 | 8.1 | 10.1 | 12 | 6.6 | 12.1 | 7.5 | 14.5 | 11.6 | 11.6 | 31 | -- | -- | -- |
| 36 | Consuegra, Spain | 11.1 | 12.9 | 18.1 | 8 | 6.9 | 6.3 | 10.4 | 12.6 | 11.2 | 10 | 9.9 | 10.9 | 16.9 | 8.2 | -- | -- | -- | -- | -- |
| 37 | Collado Villalba, Spain | 11.1 | 11.9 | 14.8 | 8.8 | 9.1 | 9.3 | 10.8 | 13.1 | 13.2 | 9.5 | 9 | 8.9 | 15.1 | 10.2 | 11.1 | 12.3 | 10.2 | 9 | 10.3 |
| 38 | Alcorcon, Spain | 11 | 10.6 | 12.6 | 8.1 | 8.3 | 8.6 | 11.3 | 14.2 | 13.8 | 12.4 | 10.4 | 8.6 | 13.5 | 8.4 | 9.7 | 10.7 | 9.4 | -- | -- |
| 39 | Lomo de Arico, Spain | 10.9 | 6.7 | 16.1 | 9.3 | 11.2 | 9.4 | 8.8 | 8.4 | 12.3 | 7.9 | 12.3 | 11.9 | 16.7 | 10 | 9.5 | 9.9 | 7.5 | -- | -- |
| 40 | Torrelavega, Spain | 10.9 | 10.7 | 17.3 | 14.1 | 13.3 | 13.7 | 10.3 | 8.6 | 10.5 | 9 | 10.1 | 9.4 | 9.5 | 11.8 | 10.9 | -- | -- | -- | -- |
| 41 | Alcala de Henares, Spain | 10.9 | 9.1 | 12.8 | 8.5 | 9.6 | 8.7 | 11.6 | 13.5 | 13.2 | 11.4 | 10.7 | 9.5 | 12.6 | 9.4 | 10.3 | 12.4 | 12.3 | -- | -- |
| 42 | Huelva, Spain | 10.7 | 6.3 | 8.5 | 8.7 | 12.2 | 10.9 | 11.4 | 11.5 | 13.1 | 10.1 | 12.4 | 10.4 | 12.1 | -- | -- | -- | -- | -- | -- |
| 43 | San Sebastian de la Gomera, Spain | 10.6 | 9.3 | 15.9 | 11.4 | 13.2 | 7.1 | 6.5 | 5.3 | 14.5 | 5.2 | 12.4 | 8.5 | 17.4 | 11.6 | 9 | 9.6 | 9.3 | -- | -- |
| 44 | Puertollano, Spain | 10.6 | 8.8 | 11.1 | 8.1 | 6 | 6.9 | 9.7 | 13.6 | 13.4 | 9.8 | 9.6 | 10.4 | 20 | 13.6 | 14.1 | 14.4 | 17.5 | -- | -- |
| 45 | Tarragona, Spain | 10.5 | 9.2 | 16.7 | 12.4 | 8.8 | 8.9 | 9.8 | 10.1 | 10.7 | 8.8 | 10.9 | 9.2 | 10.6 | 12.4 | 14 | 10 | -- | -- | -- |
| 46 | Torrevieja, Spain | 10.5 | 12.1 | 15.8 | 10.7 | 8.3 | 8.9 | 9.1 | 11.4 | 8.2 | 9.7 | 9 | 8.2 | 14.6 | 7.7 | 4.6 | 5.3 | -- | -- | -- |
| 47 | Arucas, Spain | 10.4 | 11.6 | 18.2 | 8.4 | 10.4 | 9.8 | 8 | 9 | 9.9 | 6.7 | 11.4 | 8.3 | 13.4 | 8.9 | 8.2 | 22.8 | 7.8 | 7.8 | 11.4 |
| 48 | El Medano, Spain | 10.4 | 9 | 15.6 | 11 | 17.9 | 10 | 9.9 | 7.4 | 7.6 | 5.1 | 11.3 | 6.8 | 14.1 | -- | -- | -- | -- | -- | -- |
| 49 | Igualada, Spain | 10.4 | 7.2 | 8.2 | 12.4 | 9.5 | 11.3 | 12.1 | 13 | 10.6 | 9.9 | 11.2 | 9.1 | 12 | 11.4 | 24.5 | -- | -- | -- | -- |
| 50 | Oviedo, Spain | 10.2 | 9.8 | 17.8 | 16.6 | 10.4 | 9.8 | 9.1 | 6.3 | 6.9 | 8.1 | 9.8 | 8.2 | 10.6 | 12.3 | 10 | 8.8 | 10.1 | 13.6 | -- |
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