Delaware
 
Data and Forecasts courtesy of:
 

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AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
Action DayAction Day
 
Local Air Quality Resources
 
State Air Quality Resources
American Lung Association (ALA) of Delaware
Delaware Division of Air Quality
Delaware's Air Quality Monitoring
 
Data and Forecasts courtesy of:
Current Conditions
Air Quality Index (AQI)
observed at 23:00 EDT
61
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Ozone 45 Good
Particles (PM2.5) 61 Moderate
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
103
Unhealthy for Sensitive Groups
Health Message: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors.
ACTION DAY
Air Quality Index (AQI)
70
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
Actionday icon
103
Unhealthy for Sensitive Groups
Particles (PM2.5)
55
Moderate
Ozone
70
Moderate
Particles (PM2.5)
50
Good
Forecast Discussion: Saturday and Sunday are Air Quality Action days for Code Orange (Unhealthy for Sensitive Groups or USG) ozone! A very strong “ridge” of high pressure will be in place over the eastern U.S., including Delaware, through Sunday, which is causing extremely hot and stagnant conditions. The National Weather Service (NWS) has issued an Excessive Heat Warning for Kent, New Castle, and Sussex Counties through 10 pm EDT Sunday. Please monitor the NWS for updates as this heat wave event progresses. The hot and sunny weather is very favorable for ozone formation. Saturday and Sunday will be extremely hot, with high temperatures around 100 °F. Full afternoon sun, limited vertical mixing, and light westerly surface winds will promote rapid ozone formation. Sensitive individuals should monitor air quality conditions closely on Saturday and Sunday afternoon. Particles will reach the low Moderate range both days in the increasingly polluted air mass. On Monday, a strong but slow-moving cold front will move through the state, bringing clouds, showers, and thunderstorms, with periods of heavy rain. Depending on the speed of the front, there may be enough afternoon sunshine for ozone to reach the Moderate range. Particles will drop back to the Good/Moderate threshold. **Extended Forecast: A much cooler and less humid air mass will filter into the state on Tuesday. Showers may linger through the morning and early afternoon. Ozone and particles will drop into the Good range. -Huff
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