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Slatina, nestled in the Olt County of Romania, occupies a strategic position within the Wallachian Plain. The city’s coordinates (44.4297, 24.3642) place it on the left bank of the Olt River, a significant waterway influencing local climate and potential pollutant dispersion. The surrounding landscape is predominantly agricultural, characterised by extensive farmland dedicated to cereal crops and orchards, with pockets of deciduous forests on slightly higher ground. Slatina’s terrain is generally flat, with a gentle slope towards the river, an elevation of approximately 140 meters above sea level. Historically, the city developed as a trading hub due to its river access and position along important regional routes. While not a heavily industrialised centre like some Romanian cities, Slatina hosts a concentration of food processing and light manufacturing industries, particularly related to sugar production and automotive components. These industries, alongside domestic heating during colder months, contribute to localised air pollution. The urban-rural gradient is relatively sharp, with agricultural land immediately bordering the city limits. This proximity means pollutants can be readily transported to and from surrounding agricultural activities, including fertiliser use and biomass burning, impacting overall air quality. The Olt River, while offering some dispersion, can also act as a conduit for pollutant transport downstream.

Slatina experiences a continental climate, resulting in distinct seasonal air quality patterns. Winter (December-February) typically sees the highest pollution levels, driven by increased reliance on coal and wood for domestic heating, coupled with frequent temperature inversions trapping pollutants near the ground. Calm, cold conditions exacerbate this, creating stagnant air. Spring (March-May) brings a gradual improvement as temperatures rise and heating demand decreases, though agricultural burning of crop residue can cause temporary spikes in particulate matter. Summer (June-August) generally offers the cleanest air, aided by prevailing winds and higher temperatures promoting pollutant dispersion. However, prolonged heatwaves can lead to increased ozone formation. Autumn (September-November) is a transitional period. The return to heating, combined with agricultural activities like harvesting and burning, leads to a deterioration in air quality. Fog is common in autumn and winter, further trapping pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and periods of agricultural burning. Monitoring wind direction is crucial; pollutants tend to accumulate when winds are light or from the north-east, bringing emissions from nearby settlements. Avoiding outdoor exercise during peak heating hours in winter is also advisable.