Air Quality Rankings for Virgin Islands 2026
Virgin Islands has 2 cities with EPA air quality data. St John, Virgin Islands has the cleanest air with a 5-year average AQI of 21. St Croix, Virgin Islands has the highest AQI at 27.
| # | City | 5yr Avg AQI | Current AQI | Worst Pollutant | Trend | Grade |
|---|---|---|---|---|---|---|
| 1 | St John, Virgin Islands | 21 | 22 | PM2.5 | Improving | A |
| 2 | St Croix, Virgin Islands | 27 | 29 | PM2.5 | Improving | A |
Air quality data for Virgin Islands is sourced from the EPA Air Quality System (AQS), which monitors outdoor air quality at thousands of stations nationwide.
Frequently Asked Questions
St John, Virgin Islands has the best air quality in Virgin Islands with a 5-year average AQI of 21 and a grade of A.
Virgin Islands has 2 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.