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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:

A weak front falls apart as it moves through early Saturday morning but not before ushering in northerly winds and clearing skies. Fine particles may initially be high in the morning but clean northerly flow will maintain Good air quality on Saturday. The air on Easter Sunday stays clean as winds turn from the north to the east. Under mostly sunny skies, Good air quality is maintained. Temperatures warm and winds calm on Monday causing both ozone and fine particles to rise into the upper Good range and near the Moderate threshold. - 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.