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Maryland State Government Maryland Department of the Environment

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.

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To report an environmental emergency, see Emergency Numbers.

Air Quality Forecast Discussion:

Air quality will remain in the Good range from Wednesday as strong winds from the northwest and cooler and drier conditions will be in place following Tuesday?s frontal passage. Thursday may see a slight increase in fine particles with winds weakening due to a high pressure overhead, but remain in Good AQI. On Friday, another cold front swings through the region increasing cloud cover with a chance for rain showers. Fine particles in central to eastern Maryland may reach the low Moderate range while other areas will remain in the Good range. - MDE

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