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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1055 |  Carstairs Canada | 8 | 7.9 | 11.8 | -- | -- | -- | -- | -- | -- |
| 1056 | Chestermere Canada | 8 | 10.8 | -- | -- | -- | -- | -- | -- | -- |
| 1057 | Cremona Canada | 8 | 8.7 | -- | -- | -- | -- | -- | -- | -- |
| 1058 | Lac la Hache Canada | 8 | 5 | -- | -- | -- | -- | -- | -- | -- |
| 1059 | Chatham Canada | 8 | 6.8 | 10.1 | -- | -- | -- | -- | -- | -- |
| 1060 | Innisfil Canada | 8 | 6.8 | 9.9 | -- | -- | -- | -- | -- | -- |
| 1061 | Metabetchouan-Lac-a-la-Croix Canada | 8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1062 | Quebec Canada | 8 | 6.6 | 8.3 | 6.2 | 8.5 | 9.9 | 8.3 | 8.9 | 9 |
| 1063 |  Casa Grande USA | 8 | 8.5 | 6.8 | 6.5 | 7.9 | 7.1 | -- | -- | -- |
| 1064 | McCloud USA | 8 | 7.9 | 9.5 | 8.5 | 23.2 | 22.7 | 16 | -- | -- |
| 1065 | Quincy USA | 8 | 6.5 | 6.7 | 8.8 | 21.1 | 25.4 | 8.2 | 11.4 | 13.3 |
| 1066 | Seal Beach USA | 8 | 7.9 | 8.9 | 10.5 | 12.4 | 14.2 | 11.1 | -- | -- |
| 1067 | Edgemoor USA | 8 | 6.6 | 10.5 | -- | -- | -- | -- | -- | -- |
| 1068 | Wilmington USA | 8 | 7.8 | 13 | 10.4 | 10.9 | 8.1 | 11.1 | 8.1 | 8.9 |
| 1069 | Lapwai USA | 8 | 7.8 | 8 | 11.7 | 11.2 | 7.8 | -- | -- | -- |
| 1070 | DeKalb USA | 8 | 6.7 | 12.8 | 10.7 | 12.3 | -- | -- | -- | -- |
| 1071 | Hartford USA | 8 | 6.3 | 10.5 | 10 | 12.6 | -- | -- | -- | -- |
| 1072 | Normal USA | 8 | 6.6 | 11.5 | 9.8 | 10.7 | 8.7 | 10.1 | 9.8 | 9.6 |
| 1073 | Northbrook USA | 8 | 7.2 | 10.8 | 8.1 | 9.3 | 7.3 | 8.8 | 9.1 | 8.8 |
| 1074 | Skokie USA | 8 | 7.2 | 12.6 | 10.6 | 13.6 | 11.2 | 10.5 | -- | -- |
| 1075 | Dale USA | 8 | 6.2 | 11 | 9 | 11.2 | -- | -- | -- | -- |
| 1076 | Ferdinand USA | 8 | 6.6 | 10.7 | 8.6 | 11 | -- | -- | -- | -- |
| 1077 | Newburgh USA | 8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1078 | Wynnedale USA | 8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1079 | Dubuque USA | 8 | 7.2 | 13.9 | 10.8 | 13.7 | 11.6 | 12 | -- | -- |
| 1080 | Topeka USA | 8 | 7.7 | 9.8 | 9 | 10.3 | 9.3 | 9.2 | 9.6 | -- |
| 1081 | Louisville USA | 8 | 7.5 | 11 | 9 | 10.3 | 9.1 | 9.7 | 9.4 | 8.8 |
| 1082 | Lansdowne USA | 8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1083 | Middletown USA | 8 | 8 | 9.2 | -- | -- | -- | -- | -- | -- |
| 1084 | Allen Park USA | 8 | 7.2 | 11 | 8.8 | 10.9 | 8.7 | 8.4 | 9.1 | 8.8 |
| 1085 | Oak Park USA | 8 | 7.6 | 12.9 | 11.6 | 14.4 | -- | -- | -- | -- |
| 1086 | South Haven USA | 8 | 6.8 | 9.8 | -- | -- | -- | -- | -- | -- |
| 1087 | Eagan USA | 8 | 6.1 | 12.6 | 8.8 | 11.3 | -- | -- | -- | -- |
| 1088 | North Mankato USA | 8 | 13.9 | -- | -- | -- | -- | -- | -- | -- |
| 1089 | Charlo USA | 8 | 8.6 | -- | -- | -- | -- | -- | -- | -- |
| 1090 | Columbia Falls USA | 8 | 8.4 | 10.4 | 8.7 | 8.9 | 7.5 | 7 | 10.5 | 11 |
| 1091 | Middlesex USA | 8 | 7.7 | 12.2 | -- | -- | -- | -- | -- | -- |
| 1092 | Rahway USA | 8 | 7.4 | 9.4 | 7.7 | 8.2 | 7.6 | 7.5 | 7.5 | 8.1 |
| 1093 | Rockwell USA | 8 | 7.7 | 8.9 | 8.1 | 8.2 | -- | -- | -- | -- |
| 1094 | Bucyrus USA | 8 | 7.6 | -- | -- | -- | -- | -- | -- | -- |
| 1095 | Gallipolis USA | 8 | 7.5 | 7.8 | -- | -- | -- | -- | -- | -- |
| 1096 | The Plains USA | 8 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 1097 | Tulsa USA | 8 | 8.3 | 11 | 10.3 | 11.9 | 9.7 | 11.6 | 11.6 | 10.3 |
| 1098 | Aliquippa USA | 8 | 7.7 | 10.8 | 8 | 11.4 | -- | -- | -- | -- |
| 1099 | Columbus USA | 8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1100 | Maple Glen USA | 8 | 7.7 | 11.4 | -- | -- | -- | -- | -- | -- |
| 1101 | Roslyn USA | 8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1102 | West Chester USA | 8 | 6.9 | 10.5 | 8.2 | 11.2 | -- | -- | -- | -- |
| 1103 | Aiken USA | 8 | 7.7 | 11.5 | 12.4 | 14.8 | -- | -- | -- | -- |
| 1104 | Summit USA | 8 | -- | -- | -- | -- | -- | -- | -- | -- |
