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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:

Clouds are on the increase Friday limiting ozone production. Most areas will have Good air quality with easterly winds, though areas west of I-95 may see fine particles flirt with the low Moderate range as the state will be under an inversion and winds fade later in the day. A weak front moves through early Saturday morning with northerly winds behind it and clearing skies. This will help maintain Good air quality on Saturday, though a few areas in the morning may have elevated fine particle concentrations. For Easter Sunday, sunny skies dominate. Winds turn towards the east, ushering in clean air and maintaining Good air quality. - 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.