Metropolitan Baltimore
 
Data courtesy of:
 

AQI Forecast - http://www.epa.gov/airnow/today/forecast_aqi_20150505_maryland.jpg
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
 - http://www.epa.gov/airnow/today/cur_aqi_maryland.jpg
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
AQI Animation - http://www.epa.gov/airnow/today/anim_aqi_maryland.gif
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
 
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
Action Day Program | Greater Baltimore Asthma Alliance
 
State Air Quality Resources
American Lung Association (ALA) of Maryland
Clean Air Partners
MDE - Contacts US
MDE - Air and Health Information Center
Maryland Department of the Environment (MDE)
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
84 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
61 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
84 
Moderate
Particles (PM2.5)
59 
Moderate
Ozone
61 
Moderate
Particles (PM2.5)
58 
Moderate
Forecast Discussion: A cold front will slowly move through Maryland on Wednesday, but there will not be a significant air mass change. As a result, particles will remain in the Moderate range, and there should be enough sun for ozone to reach the Moderate range at most locations as well. Increased cloud cover and onshore winds on Thursday will limit ozone to the Good range, while particles will linger in the low Moderate range. Stagnating winds on Friday morning with warm and sunny conditions in the afternoon will allow for Moderate ozone and particle concentrations. - MDE/PSAQFO

Current Conditions
Air Quality Index (AQI)
observed at 22:00 EDT
68
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 68 Moderate
Ozone 51 Moderate

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