The highest AQ index in Delaware (as of 10:00 EDT) is currently the Sussex County 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 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.
Friday, May 29: As surface high pressure builds over the Ohio Valley, light northwesterly morning winds will gradually carry regional pollutants into the First State. Furthermore, mostly sunny skies will support ozone production. However, winds will shift to westerly and strengthen through the afternoon as a low-pressure system passes to the north. In addition, pollutant carryover from Thursday will be low. As a result, high-Good AQI levels are anticipated for ozone, while Good AQI levels are anticipated to continue for PM2.5. Saturday, moderate northwesterly to northerly winds will disperse pollutants and carry clean air into the state as a cold front moves across Delaware. Furthermore, mild temperatures will limit ozone development. Therefore, Good AQI levels are anticipated for ozone and PM2.5. Sunday, as surface high pressure moves across Delaware, calm to light southwesterly winds will reduce dispersion, allowing pollutants to accumulate. Additionally, mostly sunny skies will support ozone development. These conditions are anticipated to lead to low-Moderate AQI levels for ozone and high-Good 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 24 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 |