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Nova Veneza, nestled in the southern Brazilian state of Santa Catarina, presents a unique geographic setting influencing its air quality. Located at coordinates -28.6369, -49.4978, the city occupies a gently undulating terrain within the Serra Geral formation, a region characterized by basalt plateaus and valleys. Its elevation, approximately 120 meters above sea level, contributes to localized meteorological conditions. The city’s name, ‘New Venice’, hints at its early settlement by Italian immigrants who sought to recreate the landscapes of their homeland, reflected in its canal system and planned urban layout. Surrounding Nova Veneza is a mosaic of agricultural land, primarily dedicated to soybean, corn, and fruit cultivation, alongside patches of Atlantic Forest remnants. The proximity to the Atlantic Ocean, roughly 60 kilometers east, introduces maritime influences, moderating temperatures but also potentially contributing to humidity and fog formation. While not directly within a major industrial belt, the broader region experiences industrial activity related to food processing and manufacturing. The urban-rural gradient is relatively sharp, with agricultural areas immediately bordering the city limits. This proximity means agricultural practices, including burning for land clearing, can significantly impact local air quality, particularly during drier periods. The valley location can also trap pollutants during temperature inversions.

Nova Veneza experiences a humid subtropical climate, with distinct seasonal variations impacting air quality. The summer months (December-February) often see increased humidity and occasional rainfall, which can temporarily improve air quality by washing away particulate matter. However, higher temperatures can also promote the formation of ground-level ozone, especially downwind of agricultural areas. Autumn (March-May) brings more stable atmospheric conditions and a higher risk of temperature inversions, trapping pollutants near the ground. This is often when smoke from agricultural burning is most noticeable. Winter (June-August) is typically the driest season, with frequent cold fronts bringing cooler temperatures and potentially increasing the concentration of particulate matter from wood burning for heating. Fog is also common, exacerbating pollution. Spring (September-November) sees a transition period, with increasing rainfall and temperatures, generally leading to improved air quality. Sensitive groups, such as children, the elderly, and those with respiratory conditions, should be particularly cautious during autumn and winter. Months to avoid strenuous outdoor activity are typically April-May and July-August. Monitoring wind direction is crucial, as pollutants can be transported from surrounding agricultural zones. Overall, air quality is generally better during the wetter months.