The area with the highest AQ Index (as of 18:00 EST) in is in the Northern Virginia area. Ozone (OZONE) is measuring at 31 (Good). This means air quality is satisfactory, and air pollution poses little or no risk.
Over the next few days, the highest primary air pollutant will be Particle Pollution (PM2.5) in the Northern Virginia area. It is forecasted to be 50 (Good), meaning air quality is satisfactory, and air pollution poses little or no risk.
Below is a clickable map of Loudoun County, Virginia. The markers on the map identify large, populated cities. If you hover over a marker, it will display the city name and the current AQ index. The color of the city markers also references the current AQ risk level.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 12 minutes ago
Below is a list of cities in Loudoun County where we track and forecast the AQ index. Click on a city name to get the current AQ index as well as any available forcasts.