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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 |  Ilion, Greece | 21.9 | 36.1 | 37.6 | 21.4 | 16.3 | 17.3 | 17.8 | 20.1 | 19.4 | 15.8 | 15.2 | 12.1 | 31.6 | 22 | 22.2 | -- | -- | -- | -- |
| 2 | Vasilika, Greece | 20.6 | 31.3 | 34.4 | 22.5 | 18.8 | 15.5 | 14 | 16.1 | 15.7 | 14.7 | 11.2 | 10.4 | 29.3 | 23.9 | 23.2 | -- | -- | -- | -- |
| 3 | Irakleio, Greece | 19.7 | 32.4 | 36 | 20.9 | 11.7 | 16 | 16.2 | 18.9 | 15.5 | 15.5 | 14.9 | 10.4 | 26.6 | 23.6 | 20.8 | -- | -- | -- | -- |
| 4 | Kardia, Greece | 19.6 | 26.8 | 28.2 | 20.9 | 16.5 | 14.9 | 14.6 | 17.4 | 20.7 | 30.7 | 13.2 | 8.5 | 21.7 | 22.6 | 22.1 | 22.3 | 22 | -- | -- |
| 5 | Pefki, Greece | 19.1 | 26 | 30.7 | 19.1 | 15.4 | 15.8 | 16.2 | 19.3 | 15.5 | 14.6 | -- | -- | 18 | 18.8 | 17.9 | 16.3 | -- | -- | -- |
| 6 | Plagiari, Greece | 19.1 | 28.8 | 33.5 | 19.5 | 17.8 | 16.2 | 15.1 | 16.7 | 16.2 | 14.9 | 11.7 | 9.8 | 32 | 22.9 | 22.1 | -- | -- | -- | -- |
| 7 | Xanthi, Greece | 19 | 30.7 | 31.3 | 22.3 | 19.7 | 13.5 | 10.8 | 14.8 | 10.1 | 1.7 | 7.5 | 5.5 | 2.2 | 21.2 | 22.5 | 21.6 | -- | -- | -- |
| 8 | Acharnes, Greece | 18.9 | 30.2 | 32.3 | 20.2 | 16.6 | 15.8 | 16.1 | 19 | 16.2 | 14.9 | 14 | 9.8 | 22.7 | 21.6 | 19.5 | -- | -- | -- | -- |
| 9 | Thessaloniki, Greece | 18.5 | 23.7 | 26.2 | 16.8 | 15.1 | 16.2 | 15.7 | 15 | 14.5 | 15.1 | 13.5 | 18.8 | 33.8 | 19.7 | 20.8 | 20.9 | 23.3 | -- | -- |
| 10 | Palaio Faliro, Greece | 18 | 27.4 | 28.9 | 15.3 | 10.9 | 13 | 15 | 22.7 | 22.8 | 22.7 | 16.4 | 8.1 | 17.5 | 15 | 18.5 | -- | -- | -- | -- |
| 11 | Peraia, Greece | 18 | 25 | 31.6 | 19.3 | 16.7 | 16.7 | 15.8 | 17 | 16 | 14.9 | 12 | 10.5 | 22.8 | 21.3 | 20.6 | -- | -- | -- | -- |
| 12 | Agrinio, Greece | 17.9 | 32.8 | 36.6 | 20 | 13.9 | 11.1 | 12.3 | 14.8 | 16 | 11.1 | 10.6 | 10 | 25.7 | 21 | 18.6 | -- | -- | -- | -- |
| 13 | Chalandri, Greece | 17 | 27.7 | 29.3 | 18.3 | 11.9 | 13.2 | 14.2 | 17.6 | 13.6 | 13.8 | 10.4 | 8.9 | -- | -- | -- | -- | -- | -- | -- |
| 14 | Peristeri, Greece | 16.9 | 21.8 | 25 | 16.7 | 14.2 | 15.3 | 16.1 | 19.2 | 18 | 15.5 | 12.8 | 7.9 | 20.2 | 20.2 | 21.4 | -- | -- | -- | -- |
| 15 | Demenika, Greece | 16.9 | 31 | 29.7 | 20.6 | 13 | 13.3 | 13.7 | 15.9 | 16.4 | 11.5 | 10.9 | 7.8 | 19.2 | -- | -- | -- | -- | -- | -- |
| 16 | Ano Liosia, Greece | 16.8 | 27.9 | 26.9 | 17.1 | 13.4 | 13.3 | 14.1 | 16.5 | 18 | 13.1 | 11.7 | 9.4 | 21.1 | 17.8 | 19.2 | 17.9 | 16.7 | -- | -- |
| 17 | Athens, Greece | 16.7 | 26.9 | 26.7 | 16.8 | 13.4 | 15.8 | 15.8 | 18.2 | 14.7 | 14.3 | 14 | 7.9 | 16.7 | 19.2 | 19.2 | 17.7 | 22.3 | -- | -- |
| 18 | Thermi, Greece | 16.7 | 24.9 | 26.6 | 16.7 | 14.2 | 14.8 | 13.9 | 15.8 | 15 | 13.7 | 11.3 | 10 | 23.9 | 20.9 | 20 | 23.9 | 21.3 | -- | -- |
| 19 | Piraeus, Greece | 16.4 | 26.6 | 31.8 | 16.7 | 12.6 | 15 | 15.7 | 18.5 | 14.5 | 13.6 | 11.9 | 6.6 | 14.4 | 2.2 | 15.5 | 16 | 18.2 | -- | -- |
| 20 | Psychiko, Greece | 16 | 23.1 | 27.3 | 16.7 | 13.8 | 15.4 | 15.8 | 19.2 | 14.9 | 14.4 | 13 | 6.7 | 12.8 | 18.2 | 17.5 | -- | -- | -- | -- |
| 21 | Griva, Greece | 16 | 23.9 | 29.6 | 19 | 17.9 | 11.1 | 10.8 | 12.3 | 10.5 | 11.5 | 13.7 | 13.2 | 21.4 | -- | -- | -- | -- | -- | -- |
| 22 | Keratsini, Greece | 15.9 | 21.2 | 24.8 | 15.3 | 13.2 | 16.2 | 16.6 | 20.6 | 16.8 | 15.5 | 10.8 | 6.4 | 11.1 | 18 | 17.8 | 16.7 | -- | -- | -- |
| 23 | Pyli, Greece | 15.9 | 22.4 | 24.8 | 13.7 | 11.7 | 14.8 | 15.8 | 17.1 | 15.4 | 14.9 | 15.9 | 2.4 | 2.9 | -- | -- | -- | -- | -- | -- |
| 24 | Egaleo, Greece | 15.6 | 24.8 | 29.1 | 15.8 | 11.2 | 11.6 | 12.8 | 16.9 | -- | -- | 8.4 | 6.7 | 16.3 | -- | -- | -- | -- | -- | -- |
| 25 | Neapoli, Greece | 14.7 | 22.2 | 22.1 | 27.8 | -- | 16.1 | 18.7 | -- | 16.7 | 13.3 | 11.1 | 5.4 | 8.3 | 17.5 | -- | -- | -- | -- | -- |
| 26 | Paliopanagia, Greece | 14.6 | 18.9 | 21.8 | 15.5 | 12 | 12.3 | 12.9 | 15 | 16.6 | 12.9 | 13.3 | 9.1 | 10.7 | -- | -- | -- | -- | -- | -- |
| 27 | Vrilissia, Greece | 14.5 | 22.2 | 26.1 | 16.2 | 13 | 12.9 | 13.7 | 15.2 | 12.9 | 12.4 | 10.3 | 5.4 | 13.5 | 17.7 | 17.5 | -- | -- | -- | -- |
| 28 | Peristera, Greece | 14.4 | 19.4 | 18.2 | 16.5 | 14.1 | 13.5 | 14.1 | 15.4 | 15.4 | 12.3 | 9.9 | 8.3 | 15.8 | 16.6 | 17.7 | -- | -- | -- | -- |
| 29 | Orestiada, Greece | 14.3 | 26.3 | 27.4 | 20 | 14.3 | 8.3 | 8.4 | 10.4 | 9.6 | 7.7 | 10.4 | 8.9 | 10.8 | 20 | 24.2 | -- | -- | -- | -- |
| 30 | Glyfada, Greece | 14.2 | 13.2 | 25.7 | 13.8 | 11.3 | 14.5 | 15.6 | 17.9 | 14.1 | 14.6 | 12.2 | 5.5 | 12.5 | 16.5 | 16.3 | -- | -- | -- | -- |
| 31 | Metamorfosi, Greece | 14.2 | 21.2 | 23.2 | 14.2 | 12.6 | 11.4 | 11.4 | 13.4 | 11.1 | 10.4 | 12.4 | 10.2 | 18.1 | 13.9 | 15.5 | -- | -- | -- | -- |
| 32 | Sitia, Greece | 13.9 | 21.7 | 21.7 | 15.1 | 12.2 | 14.1 | 15.1 | 17.3 | 15.3 | 13.2 | 9.3 | 3.3 | 5.2 | 17.7 | -- | -- | -- | -- | -- |
| 33 | Tsoukalaiika, Greece | 13.6 | 14.8 | 15.1 | 12.9 | 9.6 | 12.5 | 12.8 | 16 | 14.8 | 12.6 | 15.4 | 12.4 | 14 | -- | -- | -- | -- | -- | -- |
| 34 | Chaidari, Greece | 13.4 | 16.5 | 19.7 | 12.8 | 10.3 | 12.1 | 13.4 | 16.9 | 15.4 | 13 | 12.2 | 7.1 | 11.5 | 16.1 | 17.4 | 16.5 | -- | -- | -- |
| 35 | Patras, Greece | 13.4 | 22.1 | 21.6 | 14.5 | 9.5 | 10.6 | 11.4 | 13.6 | 14.4 | 10 | 10.2 | 5.8 | 17.3 | 15.8 | 14.7 | -- | -- | -- | -- |
| 36 | Papagou, Greece | 12.8 | 16.1 | 21.2 | 12.2 | 10.8 | 12.7 | 13.7 | 16.4 | 12.8 | 12.7 | 11 | 5.2 | 8.3 | 14.6 | 14.5 | 14.2 | 15.5 | -- | -- |
| 37 | Larisa, Greece | 12.7 | -- | 16.7 | 12.6 | 13 | 9.5 | 9.5 | 12.1 | 10 | 11.2 | 13.4 | 13.2 | 21.2 | -- | -- | -- | -- | -- | -- |
| 38 | Linaria, Greece | 12.3 | 12.2 | 15.5 | 10.4 | 10.7 | 12.2 | 11.7 | 14 | 11.5 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 39 | Arta, Greece | 12.2 | 16 | 19.4 | 14 | 10 | 8.6 | 11.4 | 13.5 | 13.6 | 11.1 | 10.8 | 6.2 | 11.6 | 12.4 | -- | -- | -- | -- | -- |
| 40 | Kalamaria, Greece | 12 | 1.4 | 7.1 | 1.5 | 1.6 | 1.9 | 1.8 | 15.2 | 16.4 | 16.3 | 12.6 | 12.8 | 25.3 | 1.7 | 13.2 | -- | -- | -- | -- |
| 41 | Sapes, Greece | 11.7 | 15 | 17.3 | 11.6 | 11.1 | 12.3 | 11.6 | 14.3 | 13.4 | 10.8 | 10 | 5.2 | 7.7 | 13.1 | -- | -- | -- | -- | -- |
| 42 | Vouliagmeni, Greece | 11.6 | 14 | 18.3 | 10.8 | 9.9 | 12 | 13.1 | 16.1 | 11.8 | 11.8 | 8.1 | 2.1 | 4.9 | 13.2 | 12.8 | 12.5 | -- | -- | -- |
| 43 | Rio, Greece | 11.5 | 14.4 | 17.9 | 11 | 9.2 | 11.1 | 12.3 | 14.6 | 15.8 | 10.4 | 9.9 | 3.8 | 6.3 | 11 | 11.6 | 13.4 | 14.6 | -- | -- |
| 44 | Dio Choria, Greece | 10.8 | 10.4 | 12 | 9.7 | 9.6 | 12.9 | 12.7 | 14.5 | 14.3 | 12.1 | 8.1 | 3 | 3.2 | -- | -- | -- | -- | -- | -- |
| 45 | Achaea, Greece | 10.8 | -- | 19.2 | 13.6 | 9.4 | 9 | 10.3 | 13.5 | 14.1 | 9.6 | 9.8 | 4.5 | 10.2 | -- | -- | -- | -- | -- | -- |
| 46 | Agios Nikolaos, Greece | 10 | 11.7 | 13.5 | 10.1 | 8.4 | 11.1 | 11.6 | 12.9 | 12.9 | 9.7 | 9.5 | 4.5 | 5.1 | -- | -- | -- | -- | -- | -- |
| 47 | Panepistimioupoli Patron, Greece | 10 | 10.5 | 14.7 | 9.7 | 7.8 | 9.8 | 10.7 | 12.7 | 14.5 | 9 | 8.3 | 2.9 | 5.5 | -- | -- | -- | -- | -- | -- |
| 48 | Platani, Greece | 9.2 | 10.3 | 12.9 | 8.6 | 7.1 | 8.5 | 9.4 | 11.7 | 13.5 | 9 | 8.4 | 3.1 | 5.1 | -- | -- | -- | -- | -- | -- |
| 49 | Agios Pavlos, Greece | 7.9 | 4.8 | 13.1 | 7.4 | 8.4 | 9.1 | 10.5 | 7.9 | 6 | 5.1 | 6.1 | 5.5 | 8.6 | -- | -- | -- | -- | -- | -- |
| 50 | Akteo, Greece | 4.5 | 2.7 | 4.6 | 8.5 | 6.2 | 5.6 | 4.7 | 4.6 | 5.5 | 2.1 | 2.6 | 3.1 | 4.4 | -- | -- | -- | -- | -- | -- |
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