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Ituzaingó, nestled within the Corrientes province of Argentina, occupies a geographically significant position within the Iberá Wetlands, one of the largest freshwater wetland ecosystems in the world. Located at approximately -27.6000 latitude and -56.6667 longitude, the city’s terrain is predominantly flat, characteristic of the Parana River basin. The surrounding landscape is dominated by expansive grasslands, lagoons, and forested islands, a mosaic of natural habitats that define the region’s biodiversity. Ituzaingó’s elevation is relatively low, contributing to a stable atmospheric layer that can, under certain conditions, trap pollutants. The proximity to the Paraná River, while providing a vital water source and transportation route, can also influence local weather patterns and contribute to humidity, impacting the dispersion of airborne particles. While Ituzaingó itself is a relatively small urban center with a population of around 19,575, it sits within a broader agricultural zone, with extensive cattle ranching and crop cultivation (primarily rice and yerba mate) occurring in the surrounding areas. This agricultural activity introduces potential sources of air pollution, including dust from tilling, emissions from machinery, and, occasionally, the burning of agricultural waste. The urban–rural gradient is gradual, with agricultural lands seamlessly blending into the outskirts of the city, meaning that rural pollution sources can readily impact urban air quality. The flat topography and wetland environment limit natural ventilation, potentially exacerbating localized pollution events.

The air quality in Ituzaingó is inextricably linked to the region’s distinct wet and dry seasons, a pattern dictated by the subtropical climate. The wet season, typically spanning from November to March, brings frequent rainfall and high humidity. While the rain itself can help cleanse the atmosphere by removing particulate matter, the increased humidity can also contribute to the formation of ground-level ozone, particularly during periods of intense sunlight following rainfall. The dry season, from April to October, is characterized by lower rainfall and higher temperatures. This period often sees a build-up of dust and particulate matter, especially during agricultural activities like harvesting and land preparation. Stagnant air masses are more common during the dry season, particularly in July and August, leading to a reduced dispersion of pollutants. Fog, a frequent occurrence during the cooler months, can trap pollutants near the ground, creating localized episodes of poor air quality. The prevailing winds, generally flowing from the southeast, can transport pollutants from neighboring agricultural areas into Ituzaingó. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during periods of stagnant air or high humidity, limiting strenuous outdoor activity. During the dry season, it’s advisable to monitor local conditions and consider wearing a mask when dust levels are elevated. The combination of agricultural practices and climatic conditions creates a dynamic air quality profile, requiring vigilance and adaptive strategies throughout the year.