Data courtesy of:

AQI Forecast -
Legend: National Parks/Monuments National Parks/Monuments
Legend: National Parks/Monuments National Parks/Monuments
AQI Animation -
Legend: National Parks/Monuments National Parks/Monuments
AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
Local Air Quality Resources
State Air Quality Resources
Air Quality Partnership of the Delaware Valley
American Lung Association (ALA) of Delaware
Delaware AQM - Contacts List
Delaware Division of Air Quality
Delaware's Air Quality Monitoring is undergoing maintenance. Updates for the forecasts and current conditions are not available between midnight and 4 am EST.

Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Data Not Available
AQI - Pollutant Details
Particles (PM2.5)
Data Not Available
Forecast Discussion: Mostly cloudy skies throughout Delaware will limit ozone to the Good range on Friday. Canadian wildfire smoke will continue to influence particle concentrations. As a result, Moderate particle levels will persist, aided by light surface winds. **Extended Forecast: A bout of widespread precipitation will move through the state during the early morning on Saturday. The continued presence of wildfire smoke, along with local Independence Day fireworks, will keep particle concentrations in the Moderate range. Skies are expected to be cloudy for most of the day, which will keep ozone in the Good range for another day. Clearer skies and light winds will push ozone into Moderate range on Sunday, with the potential for isolated upper Moderate condition. Particle concentrations will remain in the Moderate range as smoke and emissions due to holiday travel continue to impact air quality. -Eherts/DeBoe/Huff

Current Conditions
Data Not Available

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