Most polluted city ranking
| # | city | US AQI |
|---|---|---|
| Data is loading, please check back shortly. | ||
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Belmont, California |
16 |
| 2 |  Greenfield, Massachusetts |
27 |
| 3 | Pacific Grove, California |
28 |
(local time)