Metropolitan Baltimore
 
Data courtesy of:
 

AQI Forecast - https://files.airnowtech.org/airnow/today/forecast_aqi_20160831_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.
 - https://files.airnowtech.org/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 - https://files.airnowtech.org/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 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)
119 
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)
50 
Good
Health Message: None
AQI - Pollutant Details
Ozone
119 
Unhealthy for Sensitive Groups
Particles (PM2.5)
53 
Moderate
Ozone
48 
Good
Particles (PM2.5)
50 
Good
Forecast Discussion: On Thursday, cloud cover, cooler temperatures, and a passing cold front will improve air quality to the upper-Good or threshold Moderate AQI range for ozone. Fall-like weather will maintain Good air quality on Friday. Saturday’s air quality will primarily depend on the track of tropical storm 9, which is currently in the Gulf of Mexico. Some indications are that it will track very near or across Maryland, in which case Good air quality is anticipated. If the storm stays farther out to sea, Good to Moderate air quality might be expected. -MDE

Current Conditions
Air Quality Index (AQI)
observed at 23:00 EDT
71
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
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 71 Moderate
Particles (PM2.5) 39 Good

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