2017-2025
World's most polluted cities
The most polluted cities according to data aggregated from over 80,000 data points.
2025
World Air Quality Report
2025
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
25.1-35Exceeds by 5 to 7 times
35.1-50Exceeds by 7 to 10 times
>50.1Exceeds by over 10 times
| Rank | City | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8211 |  Rockville USA | 5 | 5.3 | 8.3 | 8.9 | 9.3 | 7.8 | 7.7 | -- | -- |
| 8212 | Lancaster USA | 5 | 4.7 | 5.1 | 5.7 | 7.9 | -- | -- | -- | -- |
| 8213 | New Bedford USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8214 | Chester USA | 5 | 5.8 | 7.8 | 4.6 | 7.2 | -- | -- | -- | -- |
| 8215 | Columbus USA | 5 | 6.4 | 5.8 | -- | -- | -- | -- | -- | -- |
| 8216 | Havre USA | 5 | 5.1 | 9.6 | -- | -- | -- | -- | -- | -- |
| 8217 | Johnson Lane USA | 5 | 5.6 | 6.5 | 6.9 | 22.3 | -- | -- | -- | -- |
| 8218 | Sandwich USA | 5 | 4.8 | 7.8 | -- | -- | -- | -- | -- | -- |
| 8219 | Rio Arriba USA | 5 | 5.4 | -- | -- | -- | -- | -- | -- | -- |
| 8220 | Eden USA | 5 | 6.8 | 7.5 | -- | -- | -- | -- | -- | -- |
| 8221 | Fishers Island USA | 5 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 8222 | Chillicothe USA | 5 | 5.3 | 10.6 | 10.5 | 12.9 | -- | -- | -- | -- |
| 8223 | Dallas USA | 5 | 4.6 | 5 | 5.2 | 3.6 | -- | -- | -- | -- |
| 8224 | Halsey USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8225 | Lake Oswego USA | 5 | 4.4 | 6.4 | 9.7 | 7.1 | 11.7 | 7.4 | -- | -- |
| 8226 | Moro USA | 5 | 5.8 | -- | -- | -- | -- | -- | -- | -- |
| 8227 | Mount Hood USA | 5 | 4.3 | 3.5 | 2.8 | -- | -- | -- | -- | -- |
| 8228 | East Greenwich USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8229 | Canyon Rim USA | 5 | 5.9 | 5.8 | 6.4 | -- | -- | -- | -- | -- |
| 8230 | Cedar City USA | 5 | 5.4 | 5.2 | 2.8 | 4.6 | -- | -- | -- | -- |
| 8231 | Centerville USA | 5 | 6.7 | 6.8 | 7.4 | 10.3 | -- | 6.8 | -- | -- |
| 8232 | Farr West USA | 5 | 7 | 7.1 | 7.7 | 11.9 | 9.8 | 7.3 | -- | -- |
| 8233 | Henefer USA | 5 | 5.7 | 5 | 4 | 10.9 | 8.1 | 6.3 | -- | -- |
| 8234 | San Juan USA | 5 | 4.4 | 3.6 | 2 | 9.6 | -- | -- | -- | -- |
| 8235 | Waterbury USA | 5 | 4.4 | 6.8 | 6.4 | 8 | -- | -- | -- | -- |
| 8236 | Battle Ground USA | 5 | 4.7 | 7 | 10.3 | 7.8 | -- | -- | -- | -- |
| 8237 | Mill Creek USA | 5 | 4.5 | 6 | 9.1 | -- | -- | -- | -- | -- |
| 8238 | Mirrormont USA | 5 | 5 | 5.9 | 4.2 | -- | -- | -- | -- | -- |
| 8239 | Mountlake Terrace USA | 5 | 4 | 5.5 | 8.5 | 6.2 | 9.2 | 6.4 | -- | -- |
| 8240 | Ritzville USA | 5 | 4.1 | 5.8 | 5 | 5.4 | -- | 4.1 | 5.8 | 6.3 |
| 8241 | Rosalia USA | 5 | 4.7 | 6.1 | 5.7 | 6.3 | -- | 4.8 | 6.5 | 6.9 |
| 8242 | Wauna USA | 5 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 8243 | Cheyenne USA | 5 | 5.3 | 4.8 | 3.5 | 8.5 | 6.4 | 3.6 | 4.9 | -- |
| 8244 | Ethete USA | 5 | 6.1 | 6.5 | -- | -- | -- | -- | -- | -- |
| 8245 |  Darlinghurst Australia | 4.9 | 6.4 | -- | -- | -- | -- | -- | -- | -- |
| 8246 | North MacLean Australia | 4.9 | 6.9 | 7.6 | 5.4 | 6.5 | -- | -- | -- | -- |
| 8247 | Oxenford Australia | 4.9 | 5.9 | 6.5 | -- | -- | -- | -- | -- | -- |
| 8248 | Southport Australia | 4.9 | 5.6 | 5.8 | 4.6 | 5.2 | 5.8 | 8.6 | -- | -- |
| 8249 | The Gap Australia | 4.9 | 5.7 | 6 | 4.2 | 6.8 | -- | -- | -- | -- |
| 8250 | Chidlow Australia | 4.9 | 4.5 | 9.2 | 8.6 | -- | -- | -- | -- | -- |
| 8251 |  Coquitlam Canada | 4.9 | 4.8 | 8.9 | 7 | 6.2 | -- | -- | -- | -- |
| 8252 | Harrison Mills Canada | 4.9 | 4.7 | 4.6 | -- | -- | -- | -- | -- | -- |
| 8253 | Sicamous Canada | 4.9 | 5.4 | 21.9 | 11.2 | 8.3 | -- | -- | -- | -- |
| 8254 | Yekooche Canada | 4.9 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 8255 | Bonner Lake Canada | 4.9 | 2.6 | -- | -- | -- | -- | -- | -- | -- |
| 8256 | Manawan Canada | 4.9 | 5 | -- | -- | -- | -- | -- | -- | -- |
| 8257 |  Varkaus Finland | 4.9 | 4.8 | 4.4 | 4.5 | 5 | -- | 5.2 | 5.9 | 4.4 |
| 8258 | Taipalsaari Finland | 4.9 | 4.6 | 4.5 | 4.6 | -- | -- | -- | -- | -- |
| 8259 | Savonlinna Finland | 4.9 | 4.7 | 5.4 | 3 | -- | -- | -- | -- | -- |
| 8260 |  Netphen Germany | 4.9 | 5 | 5.3 | 9.1 | 8.9 | -- | -- | -- | -- |
