Air Quality Rankings for Vermont 2026
Vermont has 4 cities with EPA air quality data. Windham, Vermont has the cleanest air with a 5-year average AQI of 12. Chittenden, Vermont has the highest AQI at 40.
| # | City | 5yr Avg AQI | Current AQI | Worst Pollutant | Trend | Grade |
|---|---|---|---|---|---|---|
| 1 | Windham, Vermont | 12 | 14 | PM2.5 | Improving | A |
| 2 | Bennington, Vermont | 37 | 38 | Ozone | Stable | B |
| 3 | Rutland, Vermont | 39 | 38 | PM2.5 | Stable | B |
| 4 | Chittenden, Vermont | 40 | 42 | Ozone | Stable | C |
Air quality data for Vermont is sourced from the EPA Air Quality System (AQS), which monitors outdoor air quality at thousands of stations nationwide.
Frequently Asked Questions
Windham, Vermont has the best air quality in Vermont with a 5-year average AQI of 12 and a grade of A.
Vermont has 4 cities with EPA air quality monitoring data in our database, covering multiple years of AQI measurements.
The Air Quality Index (AQI) measures five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Lower AQI values indicate cleaner air — 0-50 is "Good," while 150+ is "Unhealthy."
Cities ranked by 5-year average AQI (lower is better). Grades factor in average AQI, trend direction, unhealthy days, and dominant pollutant.