Metropolitan Baltimore
 
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AQI Forecast - http://files.airnowtech.org/airnow/today/forecast_aqi_20150829_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://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 - http://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 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)

AirNow.gov 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)
48 
Good
Health Message: None
Air Quality Index (AQI)
51 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
48 
Good
Particles (PM2.5)
42 
Good
Ozone
51 
Moderate
Particles (PM2.5)
46 
Good
Forecast Discussion: The regional airmass remains exceptionally clean with little if any indication of modification at present. As a result and despite sunny skies, warming temperatures and light winds, Good air quality is forecast for Saturday. The isolated exception continues to be areas near Hagerstown where Moderate AQI levels of fine particles are expected. The airmass should be slow to modify with weekend emissions, though a return to near 90 degree weather by Sunday should finally be enough to push ozone just over the Moderate AQI threshold. On Monday, an increase in cloud coverage will balance continued above average temperatures and work week emissions to keep the I-95 corridor in the low Moderate AQI range. - MDE

Current Conditions
Air Quality Index (AQI)
observed at 2:00 EDT
59
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 59 Moderate
Ozone 19 Good

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