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Latisana, nestled in the Friuli Venezia Giulia region of northeastern Italy, presents a unique geographic context influencing its air quality. Situated at coordinates 45.7833, 13.0000, the city lies within the low-lying plains of the Friulian Lagoon, a transitional zone between the Alps and the Adriatic Sea. The terrain is predominantly flat, a former marshland reclaimed through centuries of hydraulic engineering, now characterized by intensive agriculture. This agricultural landscape, dominated by crops like cereals and vegetables, contributes to potential particulate matter emissions from field work and fertilizer use. Latisana’s proximity to the Adriatic coast, approximately 15 kilometers distant, introduces the influence of sea breezes, which can both disperse and concentrate pollutants depending on meteorological conditions. The Tagliamento River, flowing nearby, also plays a role in local humidity and potential aerosol formation. While not heavily industrialized itself, Latisana is positioned within a region containing pockets of light industry and transport corridors, impacting background pollution levels. The urban-rural gradient is relatively sharp, with agricultural land immediately surrounding the city, meaning pollutant dispersion is limited by the flat topography and prevailing wind patterns. This combination of factors creates a localized air quality profile distinct from both the mountainous interior and the coastal areas.

Latisana’s air quality follows a distinct seasonal pattern. Winter, from December to February, often sees the poorest air quality due to temperature inversions trapping pollutants near the ground, combined with increased residential heating using wood and biomass. Calm, stable atmospheric conditions prevent dispersion, leading to higher concentrations of particulate matter. Spring (March-May) brings improvement as temperatures rise and rainfall increases, washing pollutants from the atmosphere. However, agricultural activities begin to ramp up, potentially increasing PM10 from soil disturbance. Summer (June-August) generally offers the cleanest air, aided by sea breezes and convective mixing, though occasional heatwaves can exacerbate ozone formation. August, with reduced industrial activity during the holiday period, is typically the most favourable month for outdoor activity. Autumn (September-November) sees a gradual deterioration as heating demand increases and atmospheric stability returns. Fog, common in the autumn months, can trap pollutants and reduce visibility. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and autumn periods, and monitor local conditions. Avoiding peak heating hours and staying indoors on stagnant days are recommended preventative measures.