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Maryland State Government Maryland Department of the Environment

Current Air Quality Conditions

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Clean Air Partners
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Ambient Air Monitoring Program

The Ambient Air Monitoring Program measures ground-level concentrations of criteria pollutants and air toxics, along with surface and aloft meteorological parameters. The Program also performs quality control, quality assurance, and analysis of the pollutant concentrations that are measured at each of the air monitoring stations located throughout Maryland. It is responsible for Air Quality Index (AQI) reporting and issuing daily air quality forecasts as well as coordination of 3D air-shed photochemical grid and dispersion modeling.

In addition, the Program collaborates with local universities to conduct special atmospheric monitoring research to better characterize aloft and surface atmospheric pollutant concentrations. These research initiatives support air quality planning and regulations development.

Learn More:

To report an environmental emergency, see Emergency Numbers.

Air Quality Forecast Discussion:

A weak high pressure system is forecast to move over our area during the early morning hours Friday. Winds will be light, however cold air aloft will keep mixing heights high. Expect Good AQI throughout the area. A much stronger high pressure system will begin to make its way south into the Great Lakes region on Saturday. This will set up a brisk northwest wind, keeping temperatures cold but also keeping fine particle concentrations low. As the high settles over us during the day on Monday, winds will decrease and subsidence will increase. Expect fine particle concentrations to rise, but should remain within the Good AQI range. -MDE

If you have any questions, please contact Janice Lafon at 410-537-3280 or e-mail at so that she may direct your inquiry.