Northern Delaware
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AQI Forecast -
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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
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Air Quality Partnership of the Delaware Valley
American Lung Association (ALA) of Delaware
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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
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Air Quality Index (AQI)
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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AQI - Pollutant Details
Particles (PM2.5)
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Forecast Discussion: A multi-day stretch of wintery precipitation will impact Delaware Tuesday-Thursday. It will be clear on Tuesday morning as surface high pressure moves overhead. But snow and sleet will overspread the state from west to east starting in the early afternoon before turning to all rain in the late afternoon. A brief surge of cold and dry air overnight will help to inhibit particle formation. The arrival of much warmer air aloft in the afternoon and steadily rising humidity will act to increase particle concentrations later in the day, with overall daily average air quality in the mid-Moderate range. **Extended Forecast: Rain will continue overnight and through the day on Wednesday as a slow-moving cold front makes its way across the Mid-Atlantic region. Light southerly flow and continued high atmospheric humidity will allow particles to rise higher into the Moderate range. The cold front will stall across the Mid-Atlantic on Thursday, and a wave of low pressure will ride along the front, bringing periods of heavy rain to the state. As cold air filters in behind the front, the rain will change to snow, with several inches of accumulation possible. Breezy winds and heavy precipitation will clean out the atmosphere and drop particle concentrations to the Good range. -Huff

Current Conditions
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