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Data and Forecasts courtesy of:
Maryland Department of the Environment
 

- 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 Forecast - https://files.airnowtech.org/airnow/today/forecast_aqi_20190626_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: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
Action DayAction Day
 
Local Air Quality Resources
Action Day Program
 
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)
 
Data and Forecasts courtesy of:
Maryland Department of the Environment
Current Conditions
Air Quality Index (AQI)
observed at 15:00 EDT
54
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 54 Moderate
Particles (PM2.5) 28 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
50
Good
Health Message: None
Air Quality Index (AQI)
74
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
50
Good
Particles (PM2.5)
38
Good
Ozone
74
Moderate
Particles (PM2.5)
46
Good
Forecast Discussion: A multi-day episode of Unhealthy for Sensitive Groups (USG) air quality is expected for ozone Thursday and Friday, potentially lingering in to Saturday. On Thursday, continued hot conditions with light northwest flow aloft and weak surface winds will support bay breeze circulations and increasing ozone concentrations regionally. Upstream airmass degradation transported in to our area on top of local emissions will allow ozone to top 70ppb for the 8-hour maximum east of the mountains. The coastal areas of the Chesapeake Bay from northern Anne Arundel county north and eastward through Aberdeen as well as the entire Eastern Shore Bay-coast may have ozone climb well into the USG range. Recirculating and light winds with hot conditions Friday will support increasing ozone concentrations further into the USG range, with widespread USG possible, though most focused around the northern Chesapeake Bay region. If the regional load responds drastically enough Thursday, localized areas may flirt with Unhealthy (code red) conditions Friday. Poor air quality may continue Saturday, though enough cloud cover and chances for rain may be enough to mitigate another day of USG conditions. However, at this time, no airmass change is expected during the day, keeping USG air quality for ozone a possibility. –MDE
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