The highest AQ index in Delaware (as of 16:00 EDT) is currently the Greater New Castle County area. Particle Pollution (PM2.5) is measuring at 71 (Moderate). This means air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Over the next few days, the highest Ozone (OZONE) 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.
Wednesday, July 28 and Thursday, July 29: A trough of low pressure aloft will enhance atmospheric mixing over Delaware. In addition, partly cloudy skies will hinder ozone formation, while moderate northwesterly winds aid dispersion each day. As a result, Good AQI levels are anticipated for PM2.5 and ozone on both days. Friday, light northerly winds will lead to pollutant build-up in Delaware. Furthermore, as an upper-level ridge of high pressure moves across the state, mostly sunny skies and temperatures in the mid-80s will enhance ozone formation. These conditions are anticipated to lead to mid-Moderate AQI levels for ozone and low-Moderate AQI levels for 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 3 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 |