2017-2024
World's most polluted cities
The most polluted cities according to data aggregated from over 80,000 data points.
2024
World Air Quality Report
2024
World Air Quality Report
PM2.5 legend
0-5Meets WHO guideline
5.1-10Exceeds by 1 to 2 times
10.1-15Exceeds by 2 to 3 times
15.1-25Exceeds by 3 to 5 times
25-35Exceeds by 5 to 7 times
35.1-50Exceeds by 7 to 10 times
>50.1Exceeds by over 10 times
| Rank | City | 2024 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 101 |  Guaratingueta, Brazil | 13.4 | 9 | 10 | 9.3 | 13.6 | 15.8 | 17 | 16.2 | 18.2 | 28.8 | 10.2 | 6.7 | 6.4 | 10.2 | -- | -- | -- | -- | -- | -- |
| 102 |  San Carlos, Chile | 13.4 | 7.6 | 8.6 | 9.7 | 17.4 | 32.2 | 17.2 | 28.7 | -- | -- | 10.7 | 5.9 | 6.6 | 14.5 | -- | -- | -- | -- | -- | -- |
| 103 | Talca, Chile | 13.4 | 4.4 | 5.1 | 6 | 9.4 | 36.2 | 18.8 | 36.9 | 21.7 | 10.6 | 5.8 | 2.8 | 3.5 | 15.9 | 15.9 | 17.2 | 14.6 | 17.6 | 13.7 | 14.3 |
| 104 | Vina del Mar, Chile | 13.2 | 10.7 | 14.4 | 12 | 11.1 | 18.5 | 17 | 26.7 | 11.4 | 10.2 | 8.5 | 7.9 | 9.5 | 13.1 | 16.2 | 14.3 | 12.1 | 13.8 | 11.9 | 9.6 |
| 105 | Santos, Brazil | 13.1 | 12.3 | 10.7 | 10.9 | 13 | 13.4 | 18.1 | 14.4 | 18.2 | 16.4 | 12.2 | 9.4 | 8.6 | 13.1 | 12.1 | 12 | 13.7 | 15.4 | 14.8 | 15.9 |
| 106 | Maceio, Brazil | 12.9 | 12.2 | 13.1 | 10.1 | 8.3 | 11.3 | 14.7 | 15.7 | 18.1 | 19.5 | 12 | 10.1 | 10 | 10.3 | -- | -- | -- | -- | -- | -- |
| 107 | Francisco Beltrao, Brazil | 12.9 | -- | 4.1 | 4.8 | 6.9 | 6.4 | 10.1 | 11.2 | 17.9 | 35.5 | 50.1 | -- | -- | 4 | -- | -- | -- | -- | -- | -- |
| 108 | Taubate, Brazil | 12.9 | 6.8 | 8 | 8 | 12.2 | 14.7 | 16.3 | 16.1 | 18.9 | 31.3 | 10.6 | 7.5 | 7.4 | 10.6 | 10.9 | 11.6 | 11.7 | 11.5 | 11.4 | -- |
| 109 |  Cucunuba, Colombia | 12.8 | 12.9 | 12.1 | 31.7 | 19.6 | 10.5 | 7.6 | 6.2 | 12.1 | 10.2 | 10 | 8.5 | 12 | 8 | -- | -- | -- | -- | -- | -- |
| 110 | Sao Jose dos Campos, Brazil | 12.7 | 7.8 | 8.1 | 7.9 | 12.5 | 13.6 | 17.2 | 16.1 | 18.2 | 27.2 | 9.9 | 7.5 | 6.7 | 11 | 10.2 | 15 | 11.5 | 11.8 | -- | -- |
| 111 | Los Maitenes, Chile | 12.7 | 11.1 | 11.8 | 12.9 | 11.8 | 13.6 | 11.2 | 19.8 | 11.7 | 12.5 | 9.6 | 12.9 | 12.6 | 14 | 11.4 | 12.2 | 11.1 | 13.2 | -- | -- |
| 112 | Bogota, Colombia | 12.7 | 17 | 16.5 | 24.9 | 19.4 | 8 | 8.3 | 4.5 | 8.7 | 11.4 | 9.9 | 10.7 | 13.6 | 13.4 | 15.1 | 13.7 | 14.3 | 13.1 | 13.9 | 15.7 |
| 113 | Tome, Chile | 12.6 | 9.5 | 9.5 | 9.2 | 14.3 | 22 | 11.9 | 23.7 | 16.6 | 9.9 | 10.4 | 6.6 | 7.6 | 15 | 13.2 | 13.8 | 11.5 | 15.7 | 20.9 | 14.8 |
| 114 | Valdivia, Chile | 12.6 | 4.4 | 3.7 | 5.6 | 11.1 | 23.7 | 14.4 | 28 | 25.8 | 17.4 | 8.8 | 4.2 | 3.8 | 12.6 | 14.9 | 12.7 | 13.5 | 14.5 | 33.3 | 33.5 |
| 115 | Casablanca, Chile | 12.6 | 15.2 | 14.6 | 14.2 | 14.3 | 10.9 | -- | 27.5 | 12.9 | 11.2 | 9.5 | 9.6 | 10 | 10.7 | -- | -- | -- | -- | -- | -- |
| 116 |  Whim, Guyana | 12.6 | 24.8 | 30.9 | 15.6 | 20.6 | 13.4 | 4.9 | 7 | 11.1 | 10.7 | 8.2 | 8.8 | 19.4 | 10.1 | -- | -- | -- | -- | -- | -- |
| 117 | Camacari, Brazil | 12.5 | 15.4 | 11.8 | 12.4 | 5.7 | 7.9 | 11.9 | 10.3 | 13.1 | 18.1 | 13.3 | 15.1 | 14.5 | 16.2 | 18.8 | -- | -- | -- | -- | -- |
| 118 | Guarne, Colombia | 12.5 | 15.6 | 15.8 | 26.4 | 17.4 | 7.3 | 6.4 | 7.2 | 9.9 | 12.3 | 7.8 | 6.1 | 30.5 | 10 | 9.8 | 9.4 | 12 | 8.5 | -- | -- |
| 119 |  Paramaribo, Suriname | 12.5 | 18.7 | 25.9 | 15.9 | 21.7 | 11.1 | 3.9 | 6 | 11.3 | 9.6 | 6.5 | 5.3 | 14.9 | 10.6 | 7 | 8.2 | -- | -- | -- | -- |
| 120 | Manaus, Brazil | 12.2 | 4.8 | 5.8 | 5.5 | 3.2 | 3.7 | 6.1 | 9.2 | 30.3 | 25.8 | 15.9 | 27.8 | 8.2 | 16.8 | 12.7 | 10.3 | -- | -- | -- | -- |
| 121 | Cartagena, Colombia | 12.2 | -- | -- | -- | 12 | 13.6 | 10.3 | 12.3 | 13.4 | 15.5 | 11.6 | 8.2 | 12.4 | -- | -- | -- | -- | -- | -- | -- |
| 122 | Cubatao, Brazil | 11.8 | 7.2 | 7.1 | 7.9 | 12.4 | 10.1 | 14.5 | 18.8 | 20.5 | 20.6 | 7.6 | 8.6 | 6.9 | 15.4 | 17.1 | 17 | -- | -- | -- | -- |
| 123 |  La Grama, Peru | 11.8 | 6.4 | 8.1 | 7.2 | 7.3 | 8.6 | 10.8 | 12 | 18.7 | 31.2 | 11.8 | 12.8 | 6 | 7.7 | -- | -- | -- | -- | -- | -- |
| 124 | Curitiba, Brazil | 11.7 | 4.2 | 5.8 | 6.3 | 8.4 | 9 | 17.2 | 14.9 | 23.8 | 30.4 | 6.8 | 5.1 | 3.7 | 11.9 | 12 | 12 | -- | -- | -- | -- |
| 125 |  Rafaela, Argentina | 11.5 | 7.2 | 9.5 | 8.4 | 7.1 | 9.8 | 15 | 17.5 | 15.7 | 15.3 | 9.9 | 11 | 11 | 10.8 | 10.7 | 10.4 | -- | -- | -- | -- |
| 126 | Concon, Chile | 11.5 | 8.4 | 9.5 | 10.9 | 10.2 | 14.4 | 13.3 | 19 | 11.5 | 10.3 | 9.6 | 10.2 | 10 | 12.3 | 14.2 | 14.4 | 12.4 | 14.1 | -- | -- |
| 127 |  Montevideo, Uruguay | 11.5 | 7.8 | 8.2 | 8.5 | 8.4 | 15.5 | 14.4 | 26.8 | 11.1 | 11.2 | 10.2 | 8.7 | 7.3 | 11.7 | 11.3 | 14.2 | -- | -- | -- | -- |
| 128 | Sao Mateus do Sul, Brazil | 11.4 | 5.2 | 6.8 | 7.3 | 8.2 | 7.6 | 14.9 | 14.6 | 24.4 | 30.9 | 7.7 | 5 | 4.6 | 6.7 | -- | -- | -- | -- | -- | -- |
| 129 | Caqueza, Colombia | 11.4 | -- | -- | 33.1 | 18.7 | 6.3 | 4.5 | 5.5 | 10.9 | 10.8 | 5.7 | 5.2 | 9 | -- | -- | -- | -- | -- | -- | -- |
| 130 |  Sucre, Bolivia | 11.1 | 6.8 | 7.1 | 5.4 | 6.5 | 7.3 | 11.9 | 10.8 | 17.2 | 32.8 | 15.8 | 6.3 | 6.2 | 12.2 | 14.1 | -- | -- | -- | -- | -- |
| 131 | Ponta Grossa, Brazil | 11.1 | -- | -- | -- | 6.2 | 6.7 | 10.2 | 10.8 | 21.6 | 29.7 | 7.5 | 4.2 | 3.3 | -- | -- | -- | -- | -- | -- | -- |
| 132 | Chiguayante, Chile | 11 | 4.9 | 4.3 | 3.9 | 8.1 | 25.2 | 14.9 | 27.7 | 16.5 | 10.9 | 8.3 | 4.5 | 5.3 | 11.5 | 14.6 | 15.9 | 14.9 | 19.8 | 17 | 16.1 |
| 133 | Antofagasta, Chile | 10.8 | 5.9 | 5.6 | 7 | 9.2 | 13.8 | 14.8 | 15.3 | 13.3 | 12.7 | 11 | 10.3 | 10.7 | 11.2 | 10.6 | 10.7 | 9.4 | 12.2 | 9.1 | 10.6 |
| 134 | Tumbes, Peru | 10.8 | -- | -- | 7 | 8.9 | 10.6 | 12.2 | 12.4 | 12.2 | 13.5 | 10 | 10.8 | 9.5 | -- | -- | -- | -- | -- | -- | -- |
| 135 | Curacavi, Chile | 10.6 | 7.7 | 8.7 | 7.5 | 7.2 | 12.9 | 10.8 | 29.1 | 14.6 | 8.3 | 7.3 | 5.2 | 7.1 | 12.5 | 14 | 7.1 | -- | -- | -- | -- |
| 136 | Novo Airão, Brazil | 10.5 | 3 | 4.3 | 4.1 | 1.8 | 2.1 | 4.9 | 10 | 34.3 | 32.5 | 9.7 | 17 | 10 | 5.3 | -- | -- | -- | -- | -- | -- |
| 137 | Boa Vista, Brazil | 10.5 | 7.8 | 19.9 | 38.4 | 22.7 | 1.6 | 1.6 | 2.7 | 6.6 | 6.9 | 5.7 | 5.5 | 3.9 | 7.2 | 4.5 | 5.6 | -- | -- | -- | -- |
| 138 | San Gabriel, Chile | 10.5 | 11.3 | 11 | 8.7 | 12 | 13.6 | 8.3 | 11.9 | 15.8 | 10.3 | 8.9 | 8 | 7.3 | 11.9 | -- | -- | -- | -- | -- | -- |
| 139 | Coquimbo, Chile | 10.1 | 9 | 8.6 | 8.6 | 10.2 | 15.2 | 11.8 | 15.3 | 9 | 10.9 | 6.6 | 8.4 | 7.3 | 12.4 | 10.5 | 12.2 | 10.6 | 12 | 12.8 | 17.1 |
| 140 | Foz do Iguacu, Brazil | 10 | 6.5 | 6.4 | 6.4 | 8.1 | 6.8 | 11.5 | 13 | 20 | 24.2 | 11.7 | 6 | 5.8 | 6.6 | -- | -- | -- | -- | -- | -- |
| 141 | Arica, Chile | 10 | 9.8 | 8.8 | 9.5 | 10.9 | 9 | 11.4 | 12.5 | 9.8 | 8.8 | 9.3 | 8.9 | 10.7 | 10.7 | 11.9 | 11.5 | 11.8 | 10.8 | 12.5 | 12 |
| 142 | La Paz, Bolivia | 9.9 | 4.3 | 4 | 4.3 | 6.3 | 7.7 | 9.8 | 12.3 | 12.7 | 33.4 | 14.8 | 4.7 | 4.3 | 12.6 | 7.3 | 5.5 | -- | -- | -- | -- |
| 143 | Tocopilla, Chile | 9.9 | 10.7 | 9.3 | 9.5 | 8.9 | 9.6 | 11 | 9.3 | 9.2 | 9.4 | 10.3 | 10.6 | 11.2 | 10.7 | 9.3 | 10.7 | -- | -- | -- | -- |
| 144 |  Quito, Ecuador | 9.7 | 8.7 | 6 | 8.4 | 10 | 7.7 | 8.7 | 6.2 | 10.3 | 15.9 | 11.2 | 14.2 | 9.1 | 7.4 | 12.8 | 8.4 | 7.6 | 8.6 | -- | -- |
| 145 | Chupaca, Peru | 9.5 | 2.2 | 4 | 3.7 | 5.7 | 7.7 | 12.5 | 11.7 | 16.3 | 24.3 | 10.9 | 5.6 | 6 | 7.9 | 11.5 | 8.3 | 14.4 | 14.8 | -- | -- |
| 146 | Moquegua, Peru | 9.4 | 7.9 | 8.1 | 8.6 | 10 | 10.3 | 10.1 | 10.6 | 10 | 10.6 | 9.1 | 7.8 | 9.7 | 12 | 12.2 | -- | -- | -- | -- | -- |
| 147 | Medianeira, Brazil | 9.3 | 4 | 4.3 | 3.6 | 6 | 4.6 | 7.1 | 8.6 | 15 | 32.5 | 10.8 | 4.4 | 3.6 | 4.4 | -- | -- | -- | -- | -- | -- |
| 148 | Copiapo, Chile | 9.2 | 7.7 | 7 | 7.6 | 9 | 11.4 | 11.6 | 13.2 | 9.4 | 10.3 | 7.3 | 7.8 | 7.9 | 10.7 | 10.1 | 12 | 11.5 | 12.4 | 13.8 | 16.7 |
| 149 | Marechal Candido Rondon, Brazil | 9.1 | 4.4 | 4.8 | 4.6 | 5.8 | 6.2 | 8.7 | 10.3 | 15.4 | 32.1 | 12.2 | 4.7 | 3.8 | 4.7 | -- | -- | -- | -- | -- | -- |
| 150 | Timbo, Brazil | 9.1 | 4.2 | 5.7 | 5.4 | 7.2 | 7.5 | 13.2 | 12.4 | 18.5 | 25.1 | 7.6 | 5.4 | 4 | -- | -- | -- | -- | -- | -- | -- |
