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Saavedra, a *barrio* (neighbourhood) within the city of Buenos Aires, Argentina, occupies a relatively flat portion of the Pampas region, a vast fertile grassland. Situated at approximately 37.78°S latitude and 62.35°W longitude, its elevation is low, averaging around 25-30 meters above sea level. This proximity to the Río de la Plata estuary, a wide expanse of water formed by the confluence of the Paraná and Uruguay rivers, significantly influences local climate and air circulation. While not directly on the riverfront, Saavedra benefits from the moderating effects of the estuary’s breezes. The urban landscape is densely populated, a characteristic of Buenos Aires, with a mix of residential areas, commercial zones, and limited industrial activity concentrated further north and west towards the Greater Buenos Aires conurbation. The surrounding landscape transitions from urban density to agricultural lands further inland, contributing to seasonal particulate matter from farming practices. The urban-rural gradient is relatively gradual, with suburban sprawl blurring the lines. Air quality is impacted by the prevailing easterly winds carrying pollutants from the city centre and the industrial zones to the west, and occasionally, agricultural dust from the Pampas. The flat terrain hinders dispersion of pollutants, potentially leading to localised build-up, particularly during temperature inversions.

Saavedra experiences a temperate climate with distinct seasons, each impacting air quality differently. Spring (September-November) brings increasing temperatures and winds, initially dispersing winter pollutants but also stirring up allergens like pollen. Rainfall increases, helping to wash particulate matter from the atmosphere, making it generally a favourable time for outdoor activity. Summer (December-February) is hot and humid, often with stagnant air conditions and temperature inversions, trapping pollutants from vehicle emissions and industrial sources. January and February are typically the months with the highest concentrations of ground-level ozone due to increased sunlight and heat. Autumn (March-May) offers a transition period with cooler temperatures and moderate rainfall, improving air quality. However, agricultural burning in surrounding areas can contribute to particulate matter spikes. Winter (June-August) is mild but often damp and foggy, leading to increased concentrations of particulate matter and reduced visibility. Cold air masses can create stable atmospheric conditions, exacerbating pollution. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during summer heatwaves and winter fog events. Monitoring local conditions and adjusting activity levels accordingly is crucial.