The highest AQ index in Delaware (as of 13:00 EDT) is currently the Greater New Castle County area. Particle Pollution (PM2.5) is measuring at 67 (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.
Friday, June 19: Lingering clouds, scattered showers, and slightly cooler temperatures will limit ozone formation. In addition, light to moderate west-northwesterly winds behind a departing cold front will disperse pollutants. Thus, AQI levels are anticipated to be high-Good for ozone and Good for PM2.5. Saturday, mostly sunny skies and temperatures in the low- to mid-80s will increase ozone production across Delaware. However, periods of gusty west-northwesterly winds will keep pollutants well dispersed. As a result, AQI levels are anticipated to be high-Good for ozone and Good for PM2.5. Sunday, northwesterly winds will weaken as surface high pressure approaches Delaware, reducing dispersion and leading to pollutant build-up. Furthermore, mostly sunny skies and temperatures in the mid-80s will enhance ozone production. Therefore, AQI levels are anticipated to be mid-Moderate for ozone and high-Good 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 9 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 |