The highest AQ index in Delaware (as of 9:00 EDT) is currently the Greater New Castle County area. Particle Pollution (PM2.5) is measuring at 59 (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.
Saturday, July 6: As a weak cold front moves across Delaware, clouds, rain showers, and thunderstorms will limit ozone production. Additionally, light to moderate southwesterly winds will increase pollutant dispersion. As a result, high-Good AQI levels are anticipated for both ozone and PM2.5. Sunday, calm to light west-northwesterly winds throughout much of the day will reduce dispersion, allowing pollutants to accumulate across Delaware. Furthermore, partly to mostly sunny skies and temperatures near 90F 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. Monday, calm winds through the morning hours will allow pollutants to accumulate in Delaware, and partly to mostly sunny skies through midday day will aid ozone formation. However, light south-southeasterly winds will increase dispersion in the afternoon, and scattered afternoon rain showers will reduce ozone formation. These conditions are anticipated to lead to low-Moderate AQI levels 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 1 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 |