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Landover, Maryland, is situated within the Piedmont Plateau, a region characterized by gently rolling hills and relatively low relief. Located approximately 10 miles northeast of Washington D.C., it forms part of the densely populated Baltimore-Washington metropolitan area. The terrain is largely suburban, transitioning from residential neighborhoods to commercial corridors along the US-50 highway. Its coordinates (38.9241, -76.8875) place it within Prince George’s County, a region experiencing ongoing development and a complex interplay between urban and rural landscapes. The proximity to the Anacostia River and its tributaries influences local humidity and can contribute to temperature inversions, trapping pollutants. While not directly adjacent to heavy industry, Landover is downwind from industrial zones in neighboring counties and benefits from, and is impacted by, the extensive transportation network servicing the capital region, including Baltimore-Washington International Thurgood Marshall Airport. The urban-rural gradient is significant; moving eastward and southward quickly leads to more agricultural land, while westward brings the concentrated urban core of Washington D.C. This positioning makes Landover susceptible to pollutants originating from both urban emissions and agricultural practices, like fertilizer application. The relatively flat topography limits natural dispersion of air pollutants.

Landover’s air quality follows a distinct seasonal pattern. Spring brings increased pollen counts, impacting those with allergies, but generally moderate pollutant levels as rainfall helps clear the air. Summer often sees higher ozone formation due to increased temperatures and sunlight reacting with vehicle emissions, peaking in July and August. Stagnant air masses and temperature inversions can exacerbate this, trapping pollutants near the ground. Autumn offers a respite, with cooler temperatures and increased wind speeds dispersing pollutants, making September and October generally the best months for outdoor activity. However, wood burning for heating begins to contribute to particulate matter. Winter presents the most challenging conditions. Reduced sunlight limits ozone formation, but cold temperatures encourage the use of heating fuels, increasing particulate matter and sulfur dioxide. Snowfall can temporarily improve air quality by settling pollutants, but melting snow releases them again. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during summer ozone peaks and winter heating seasons. Monitoring forecasts and adjusting activity levels accordingly is crucial for maintaining health.