The highest AQ index in Delaware (as of 16:00 EDT) is currently the Wilmington Area area. Ozone (OZONE) is measuring at 23 (Good). This means air quality is satisfactory, and air pollution poses little or no risk.
Over the next few days, the highest Particle Pollution (PM2.5) will be in the Greater New Castle County area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Tuesday, September 29: A lingering trough of low pressure aloft will aid atmospheric mixing, while partly cloudy skies hinder ozone formation. In addition, light northwesterly winds will carry a clean air mass across the Mid-Atlantic. Therefore, Good AQI levels are anticipated for ozone and PM2.5. Wednesday, as surface high pressure moves into the state, light and variable winds will inhibit dispersion, and warmer temperatures will aid ozone development. However, pollutant carryover from the prior days will be low. Thus, AQI levels are anticipated to be high-Good for ozone and PM2.5. Thursday, a building ridge of high pressure aloft will limit atmospheric mixing. In addition, southwesterly winds will carry regional pollutants into Delaware, while partly sunny skies and highs in the mid-80s support ozone formation. Therefore, low-Moderate AQI levels are anticipated for ozone and PM2.5.
| 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 23 minutes ago
Below is a list of counties in Delaware. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.
| Kent | New Castle | Sussex |