Delaware
 
Data and Forecasts courtesy of:
 

AQI Forecast - https://files.airnowtech.org/airnow/today/forecast_aqi_20170727_va_wv_md_de_dc.jpg Map Map Map Map Map Map Map Map Map Map Map Map
 
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 - https://files.airnowtech.org/airnow/today/cur_aqi_va_wv_md_de_dc.jpg Map Map Map Map Map Map Map Map Map Map Map Map
 
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Legend: National Parks/Monuments National Parks/Monuments
 
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 AQM - Contacts List
Delaware Division of Air Quality
Delaware's Air Quality Monitoring
 
Data and Forecasts courtesy of:
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
44 
Good
Health Message: None
Air Quality Index (AQI)
36 
Good
Health Message: None
AQI - Pollutant Details
Ozone
44 
Good
Particles (PM2.5)
33 
Good
Ozone
36 
Good
Particles (PM2.5)
27 
Good
Forecast Discussion: Thursday will be a seasonable yet humid day in the State of Delaware as southerly winds bring a more humid air mass into the state ahead of an approaching cold front. Increased atmospheric moisture and a nearby front will result in mostly cloudy skies and a chance for isolated showers and thunderstorms in the late afternoon and evening hours. Clean regional conditions and cloud cover will keep ozone in the Good range. Particles will react to the increasingly humid air mass and rise slightly but remain in the Good range. **Extended Forecast: A strong atmospheric disturbance and a cold front will move into the state on Friday. Light surface winds in the morning hours will give way to mostly cloudy skies and gusty winds in the afternoon as precipitation enters the state. Scattered showers will begin in the early afternoon, with widespread heavy rain arriving in the late afternoon and evening hours. Heavy rain and long periods of unsettled conditions will bring ozone and particles well into the Good range on Friday. A few showers will linger into Saturday but are expected to clear by the late afternoon. A cool Canadian air mass will filter into the Mid-Atlantic region, limiting temperatures to the upper 70s °F. Gusty surface winds and northeasterly flow aloft will combine with below average temperatures and a clean air mass to keep ozone and particles well within the Good range on Saturday. -Enlow/Huff

Current Conditions
Air Quality Index (AQI)
observed at 2:00 EDT
27
Good
Health Message: None
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 27 Good
Particles (PM2.5) 20 Good

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Yesterday's Maps and Data
Air Quality Maps Archives (by region)