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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2101 |  Shepherdstown, USA | 13.1 | 14.9 | 14 | 9.8 | 9.4 | 12.4 | 25.1 | 15.9 | 14.3 | 10.2 | 6.6 | 12.1 | -- | 12.6 | 13.4 | -- | -- | -- | -- |
| 2102 |  Heist-op-den-Berg, Belgium | 13 | 17.2 | 21.8 | 12.5 | 17.3 | 15.7 | 14.7 | 6.9 | 8.7 | 12.6 | 8.5 | 9 | 11.4 | 16.7 | 18.8 | -- | -- | -- | -- |
| 2103 |  Ribeirao Preto, Brazil | 13 | 6.5 | 6.8 | 8.9 | 10.3 | 16.8 | 15.8 | 15.5 | 19.8 | 17.3 | 13.5 | 12.3 | 9.4 | 13 | 11.8 | 7.2 | 8.2 | 11.3 | 5.9 |
| 2104 |  Castor, Canada | 13 | 14.1 | 7.3 | 12.6 | 5.7 | 23.5 | 15 | 26.7 | 16.4 | 17.2 | 4.3 | 6.1 | 3.6 | -- | -- | -- | -- | -- | -- |
| 2105 | Grande Prairie, Canada | 13 | 13.8 | 3.4 | 4.9 | 2.9 | 20 | 26.4 | 30.2 | 20.9 | 16.2 | 4 | 5.4 | 5.7 | 5.2 | 6.7 | 5.6 | 7.6 | -- | -- |
| 2106 |  Meirav, Israel | 13 | 16.1 | 10.1 | 10.7 | 8.6 | 13.2 | 13.5 | 13.9 | 12.4 | 11.5 | 11.3 | 15.5 | 20.8 | -- | -- | -- | -- | -- | -- |
| 2107 |  Kurume, Japan | 13 | 16.3 | 12.8 | 14.8 | 15.3 | 16 | 14.8 | 12.5 | 10.7 | 9.2 | 10.5 | 12.5 | 11.8 | 13.4 | 12.8 | -- | 13.7 | 14.5 | 15.9 |
| 2108 | Miyakonojo, Japan | 13 | 16.3 | 14.5 | 16.6 | 16.6 | 12.8 | 11.1 | 10.3 | 7.9 | 10.8 | 12.9 | 14.5 | 13.1 | 12.8 | 11.9 | 14 | 14.2 | 15.2 | 16.5 |
| 2109 |  Abasolo, Mexico | 13 | 18.4 | 14.7 | 13.6 | 15.4 | 21.2 | 14.6 | 10.4 | 8.5 | 10 | 7.4 | 9.5 | 12.1 | 12.7 | 13.9 | 12.1 | 13.6 | 13 | -- |
| 2110 | Santiago de Queretaro, Mexico | 13 | 18.4 | 14.6 | 15.7 | 16.7 | 20.7 | 13.8 | 10 | 9.8 | 10.4 | 7.6 | 7.9 | 10.2 | 12.9 | 6.7 | 6.3 | 9.2 | -- | -- |
| 2111 |  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 |
| 2112 | 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 | -- | -- | -- | -- | -- | -- |
| 2113 |  San Roque, Spain | 13 | 9 | 10.8 | 9.1 | 12.4 | 12.5 | 14 | 17 | 15.1 | 13 | 15.9 | 13.4 | 13.1 | -- | -- | -- | -- | -- | -- |
| 2114 |  Surbiton, United Kingdom | 13 | 17.8 | 18.7 | 13.7 | 11.1 | 8.4 | 11 | 12.2 | 12.3 | 17.2 | 10.7 | 9.5 | 9.3 | 15.3 | -- | -- | -- | -- | -- |
| 2115 | Hanford, USA | 13 | 14.9 | 16.5 | 6.8 | 7.3 | 6.5 | 8.7 | 10.4 | 11.6 | 12.3 | 13.7 | 20.8 | 27 | 14.8 | 15.4 | 20.4 | -- | -- | -- |
| 2116 | Wilmington, USA | 13 | 11.9 | 15 | 8.5 | 9.4 | 9.9 | 29.5 | 15.9 | 14.3 | 10.6 | 8.3 | 10.7 | 12.5 | 10.4 | 10.9 | 8.1 | 11.1 | 8.1 | 8.9 |
| 2117 | Cartersville, USA | 13 | 12 | 11.3 | 13.7 | 10.9 | 12.8 | 19.9 | 16.6 | 15.5 | 15.5 | 8.7 | 10.7 | 8.5 | 12.7 | 14.4 | 11.6 | 14 | -- | -- |
| 2118 | LaGrange, USA | 13 | -- | 14.4 | 14.9 | 8.5 | 14.6 | 18.4 | 16.2 | 15.1 | 16.7 | 8.6 | 10.6 | 7.7 | -- | -- | -- | -- | -- | -- |
| 2119 | Hayden, USA | 13 | 6.4 | 3.1 | 2.9 | 4.7 | 8.4 | 7.1 | 8.6 | 45 | 10.2 | 10 | 17.3 | 10.5 | 10.4 | 10.4 | -- | -- | -- | -- |
| 2120 | Chicago, USA | 13 | 14.6 | 9.4 | 10.1 | 9 | 9.8 | 28.4 | 17.4 | 16.8 | 12.6 | 7.9 | 9.9 | 9.8 | 11.8 | 13.4 | 11.1 | 12.8 | 9.4 | 6.7 |
| 2121 | Newark, USA | 13 | 15.6 | 11.9 | 12 | 10.5 | 11.3 | 32.1 | 14.5 | 15.6 | 11.1 | 6.8 | 7.9 | 7.8 | 11.6 | 12.4 | -- | -- | -- | -- |
| 2122 | Davenport, USA | 13 | 17.4 | 9.7 | 11.8 | 8.9 | 10.4 | 29.1 | 15.4 | 15.9 | 13.2 | 7.1 | 8.1 | 8.4 | 10.5 | 12.1 | 10.8 | 9.5 | 10.4 | 10.4 |
| 2123 | Fairborn, USA | 13 | 14.9 | 11.5 | 11.1 | 10.3 | 10.3 | 27.8 | 16.7 | 16.5 | 10.5 | 6.5 | 9.3 | 8.8 | 10.8 | -- | -- | -- | -- | -- |
| 2124 | Bethlehem, USA | 13 | 12.5 | 15.2 | 8.7 | 9.6 | 9.3 | 31.1 | 18.8 | 13.7 | 10.2 | 6.6 | 9.6 | 12.5 | 11.4 | 13.8 | 12 | 13.8 | -- | -- |
| 2125 | Friedens, USA | 13 | 14.1 | 11.8 | 10.2 | 10.9 | 11.6 | 26.1 | 18.1 | 16 | 11.3 | 6.5 | 10.4 | 8.8 | 13.3 | -- | -- | -- | -- | -- |
| 2126 | Glenside, USA | 13 | 12.4 | 13.8 | 9.6 | 8.9 | 10.2 | 32.1 | 18.2 | 13.7 | 10.4 | 6.8 | 8.9 | 11.6 | 8.7 | -- | -- | -- | -- | -- |
| 2127 | Waynesboro, USA | 13 | 13.2 | 11.7 | 9 | 9.5 | 10.4 | 28.3 | 16.5 | 15.3 | 11 | 6.8 | 12.2 | 12.5 | 10.4 | -- | -- | -- | -- | -- |
| 2128 |  Kirchstetten, Austria | 12.9 | 18.9 | 20.4 | 16 | 14.2 | 11.4 | 10.2 | 9.1 | 10.2 | 12.3 | 8.2 | 8.2 | 18.9 | -- | -- | -- | -- | -- | -- |
| 2129 |  Sveta Nedelja, Croatia | 12.9 | 18 | 39.1 | 16.5 | 10.6 | 8 | 8.4 | 6.2 | 8.6 | 7.7 | 8.4 | 10.1 | 14.6 | 25.7 | -- | -- | -- | -- | -- |
| 2130 |  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 |
| 2131 | 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 |
| 2132 |  Komárno, Hungary | 12.9 | 16.6 | 17.6 | 13.1 | 11.4 | 10.7 | 12 | 16.1 | 13.5 | 11.9 | 7.7 | 7.8 | 15.6 | -- | -- | -- | -- | -- | -- |
| 2133 |  Torino, Italy | 12.9 | 15.8 | 22.1 | 14.8 | 8.7 | 7.3 | 9.4 | 11.6 | 9.1 | 10.9 | 11.5 | 10.5 | 21.3 | 7 | 7.2 | 7.1 | 8.5 | 12.1 | 12.9 |
| 2134 | Laives, Italy | 12.9 | 18 | 22.1 | 13.6 | 7.9 | 7.2 | 10.1 | 11.5 | 11.3 | 12.5 | 12.3 | 9.9 | 16.7 | -- | -- | -- | -- | -- | -- |
| 2135 |  Bydgoszcz, Poland | 12.9 | 13 | 17.9 | 13.7 | 11 | 8.8 | 9.6 | 7 | 6.1 | 13.2 | 14.1 | 18.7 | 22.6 | 13 | 13.1 | 15.8 | 21.7 | 24.2 | 20.7 |
| 2136 | 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 |
| 2137 |  Pyeongchang, South Korea | 12.9 | 22.6 | 22.2 | 19.3 | 12.7 | 8.3 | 2.9 | 8.6 | 9.2 | 7.9 | 11.3 | -- | 17.8 | 15.1 | 13.7 | -- | 25.2 | -- | -- |
| 2138 |  Nugegoda, Sri Lanka | 12.9 | 32.9 | 23.4 | 23.8 | 15.4 | 9.8 | 8.2 | 8.7 | 8.9 | 3.1 | 4.9 | 5.8 | 10 | -- | -- | -- | -- | -- | -- |
| 2139 |  Na Wang, Thailand | 12.9 | -- | -- | -- | 27 | 23 | 9.1 | 4.9 | 7 | 4.4 | 10.4 | 18.4 | 21.6 | 42.2 | -- | -- | -- | -- | -- |
| 2140 |  Gazipasa, Turkey | 12.9 | 11.9 | 8.6 | 11.6 | 9.1 | 13.7 | 15.5 | 14.8 | 21.4 | 12.7 | 12.3 | 13.7 | 8.3 | -- | -- | -- | -- | -- | -- |
| 2141 | Uniontown, USA | 12.9 | 7.6 | 9.3 | 16.1 | 10.5 | 15 | 18.2 | 17.4 | 16.6 | 18.2 | 9.5 | 9.2 | 7.9 | 12.1 | 13.1 | -- | -- | -- | -- |
| 2142 | Pomona, USA | 12.9 | 8.9 | 7.6 | 8.7 | 16.2 | 14.3 | 15.9 | 19.9 | 13.7 | 19.7 | 9.5 | 8.4 | 12.3 | 13 | 15.8 | 17 | 14.5 | -- | -- |
| 2143 | Saint Charles, USA | 12.9 | 11.9 | 9.4 | 10.1 | 11 | 10.3 | 32.6 | 16.5 | 12.7 | 9.9 | 8.5 | 9.8 | 8.8 | 41.2 | -- | -- | -- | -- | -- |
| 2144 | Cedar Rapids, USA | 12.9 | 13.5 | 17.8 | 9.2 | 9.5 | 10.8 | 27.9 | 13.9 | 15.5 | 13.7 | 6.5 | 7.9 | 9 | 9.8 | 12.2 | 8.9 | 7.9 | 8.4 | 7.4 |
| 2145 | Shreveport, USA | 12.9 | 10 | 10.6 | 12.6 | 8.9 | 17.5 | 20 | 14.4 | 15.4 | 16.8 | 9.6 | 10.1 | 8.9 | 12.5 | 12.3 | 7.5 | 6.6 | 6.6 | 7.3 |
| 2146 | Detroit, USA | 12.9 | 12.9 | 10.4 | 11.1 | 11.9 | 10.3 | 29.9 | 13.8 | 15.2 | 11.1 | 7.3 | 10.2 | 10.6 | 10 | 12.3 | 9.8 | 9.9 | 9.4 | 9.1 |
| 2147 | Grandville, USA | 12.9 | 15.9 | 11.2 | 10.7 | 9.5 | 9.1 | 28.4 | 15.5 | 15.8 | 11.4 | 6.9 | 10.3 | 9.6 | 11.4 | -- | -- | -- | -- | -- |
| 2148 | Oak Park, USA | 12.9 | 16.7 | 12.3 | 11.4 | 11.1 | 9.3 | 28 | 15.8 | 14.7 | 11.4 | 6.9 | 8.8 | 9.2 | 11.6 | 14.4 | -- | -- | -- | -- |
| 2149 | Downingtown, USA | 12.9 | 13.2 | 13.2 | 9.5 | 8.9 | 10 | 27.8 | 16.9 | 13.8 | 9.9 | 6.9 | 10.4 | 12.7 | 11.9 | -- | -- | -- | -- | -- |
| 2150 | Inchelium, USA | 12.9 | 13.5 | 12.8 | 5.7 | 4.9 | 7.8 | 8.2 | 8.4 | 41.1 | 9.6 | 9.2 | 13.1 | 14.9 | 8.5 | 30.7 | -- | -- | -- | -- |
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