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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3020 |  Kaiminani USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3021 | Boise USA | 5.5 | 10.3 | 6.4 | 8.5 | 10.7 | 9.3 | 6.9 | -- | -- |
| 3022 | Twin Falls USA | 5.5 | 7.5 | 5.1 | 6.4 | 8.6 | 7 | 5 | 8.4 | 9.5 |
| 3023 | Bangor USA | 5.5 | 5 | 5.3 | 5 | 4.8 | 4.7 | 4.9 | 5.3 | 5.5 |
| 3024 | Brunswick USA | 5.5 | 5.3 | 9.2 | -- | -- | -- | -- | -- | -- |
| 3025 | Fall River USA | 5.5 | 5.3 | 7.6 | 6.3 | 7.2 | 7.5 | 7.2 | 7.5 | 7.2 |
| 3026 | North Reading USA | 5.5 | 5.6 | 8.6 | 7.7 | 9 | -- | -- | -- | -- |
| 3027 | Pepperell USA | 5.5 | 5.3 | 7 | 6.3 | 9.4 | -- | -- | -- | -- |
| 3028 | Sharon USA | 5.5 | 5.6 | 7.9 | 6.6 | 8.6 | -- | -- | -- | -- |
| 3029 | Weymouth Town USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3030 | Cut Bank USA | 5.5 | 5.7 | 4.5 | 8.5 | 9.4 | -- | -- | -- | -- |
| 3031 | Miles City USA | 5.5 | 6.6 | 8.5 | -- | -- | -- | -- | -- | -- |
| 3032 | Fallon USA | 5.5 | 6.6 | 5 | 7.4 | 19.4 | -- | -- | -- | -- |
| 3033 | Monmouth USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3034 | Albuquerque USA | 5.5 | 5.6 | 4 | 4.2 | 6.5 | 6.9 | 6.1 | 5.6 | 5.7 |
| 3035 | Clifton USA | 5.5 | 4.7 | 7.3 | -- | -- | -- | -- | -- | -- |
| 3036 | Norwich USA | 5.5 | 5.5 | 7.9 | -- | -- | -- | -- | -- | -- |
| 3037 | Ravena USA | 5.5 | 5.2 | 7.4 | -- | -- | -- | -- | -- | -- |
| 3038 | Shokan USA | 5.5 | 4.9 | 8.4 | 6.4 | 8.8 | -- | -- | -- | -- |
| 3039 | Buncombe USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3040 | Ashland USA | 5.5 | 5.7 | 9.8 | 7.8 | 15.2 | 12.4 | 6.4 | 14.8 | 10.9 |
| 3041 | Independence USA | 5.5 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 3042 | Keizer USA | 5.5 | 4.9 | 7.8 | 10.2 | 8 | 15.2 | 9.9 | -- | -- |
| 3043 | La Grande USA | 5.5 | 6.3 | 6.1 | 8.7 | 6.1 | 7.8 | 5.6 | 8.5 | -- |
| 3044 | Sisters USA | 5.5 | 7.5 | 11.7 | 6.8 | 8.9 | 16 | 5.7 | 7.3 | 12 |
| 3045 | Springfield USA | 5.5 | 5.4 | 7.4 | 9.4 | 7.3 | 16 | 9 | 9 | 11.2 |
| 3046 | Charleston USA | 5.5 | 4.5 | 8.8 | 8.9 | 8.9 | 7.7 | 9.1 | 7.5 | 7.7 |
| 3047 | Morristown USA | 5.5 | 5.5 | 5.8 | 1.6 | 9.5 | -- | -- | -- | -- |
| 3048 | Tellico Village USA | 5.5 | 5.9 | 5.6 | -- | -- | -- | -- | -- | -- |
| 3049 | Kaysville USA | 5.5 | 6.9 | 7 | 7.4 | 10.9 | 8.8 | 6.2 | -- | -- |
| 3050 | Payson USA | 5.5 | 5.7 | 5.6 | 6.1 | 8.8 | 7.4 | 5.8 | -- | -- |
| 3051 | Waitsfield USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3052 | Airway Heights USA | 5.5 | 5.1 | 6.9 | 6.9 | 9.3 | -- | -- | -- | -- |
| 3053 | Brewster USA | 5.5 | 5.4 | 8.4 | 5.6 | 14.5 | 11.9 | 7.7 | -- | -- |
| 3054 | East Port Orchard USA | 5.5 | 4.9 | 7 | 13.5 | -- | -- | -- | -- | -- |
| 3055 | Ellensburg USA | 5.5 | 4.3 | 6.9 | 10.8 | 7.7 | 8.8 | 6.5 | 8.2 | 16.1 |
| 3056 | Royal City USA | 5.5 | 4.4 | 8.9 | 10.9 | -- | -- | -- | -- | -- |
| 3057 | Tenino USA | 5.5 | 4.9 | 9.1 | -- | -- | -- | -- | -- | -- |
| 3058 | DeForest USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3059 | Etna USA | 5.5 | 5.9 | 5.4 | 6.5 | -- | -- | -- | -- | -- |
| 3060 |  Hazelton Canada | 5.4 | 7.1 | 9.8 | 8.3 | 9.9 | 10.7 | 13.5 | -- | -- |
| 3061 | Nakusp Canada | 5.4 | 7.4 | 11.4 | 12.3 | 16.2 | -- | -- | -- | -- |
| 3062 | Dorset Canada | 5.4 | 4.1 | 7.3 | -- | -- | -- | -- | -- | -- |
| 3063 | Larder Lake Canada | 5.4 | 4.2 | 10.3 | -- | -- | -- | -- | -- | -- |
| 3064 | Mesa USA | 5.4 | 6.1 | 4 | 3.5 | 5.4 | 6.2 | 4.3 | 6.6 | 8.2 |
| 3065 | Parker USA | 5.4 | 5.1 | 4.3 | -- | -- | -- | -- | -- | -- |
| 3066 | Auburn USA | 5.4 | 5.1 | 6 | 8.9 | 11.1 | 14.2 | 5.9 | 12.1 | 9.9 |
| 3067 | Benicia USA | 5.4 | 5.2 | 6.2 | 8.1 | 8.9 | 12 | 7.2 | -- | -- |
| 3069 | Cambrian Park USA | 5.4 | 5 | -- | -- | -- | -- | -- | -- | -- |
| 3070 | Coloma USA | 5.4 | 5.2 | 6.4 | 9.2 | -- | -- | -- | -- | -- |
