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Sloviansk, situated in the Donetska Oblast of eastern Ukraine at coordinates 48.8533°N, 37.6250°E, occupies a geographically significant position within the Donbas region. The city lies on the banks of the Siverskyi Donets River, a crucial waterway influencing local climate and potential pollutant dispersion. The terrain is characterised by gently rolling hills and plateaus, typical of the western edge of the Donets Ridge, with an elevation ranging between 160-200 meters above sea level. Historically, Sloviansk developed as an industrial centre, initially focused on salt production and later expanding to include chemical and machine-building industries. This industrial legacy contributes significantly to the city’s air quality challenges. Surrounding Sloviansk is a mix of agricultural land – primarily wheat and sunflower cultivation – and remnants of heavy industry. The urban-rural gradient is relatively sharp, transitioning quickly to open fields and smaller villages. The proximity to the Siverskyi Donets provides some degree of natural ventilation, but temperature inversions, common in the region, can trap pollutants, particularly during colder months. The ongoing conflict in the region has also disrupted environmental monitoring and potentially increased pollution from military activity and infrastructure damage, impacting the overall air quality profile of Sloviansk.

Sloviansk’s air quality follows a distinct seasonal pattern. Spring (March-May) often sees a rise in particulate matter due to agricultural burning and dust from thawing ground, exacerbated by winds carrying pollutants from surrounding areas. Summer (June-August) generally offers improved air quality, benefiting from increased rainfall which helps to cleanse the atmosphere and stronger winds aiding dispersion. However, high temperatures can promote the formation of ground-level ozone, a respiratory irritant. Autumn (September-November) is often marked by a deterioration in air quality as heating systems are activated, increasing emissions from coal and other fuels. This period is also prone to temperature inversions, trapping pollutants near the ground. Winter (December-February) represents the most challenging period for air quality, with consistently cold temperatures leading to increased reliance on solid fuel heating and reduced atmospheric mixing. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during autumn and winter. Fog, common in the colder months, can further concentrate pollutants. Months of July and August generally present the most favourable conditions for outdoor activity, though monitoring for ozone levels is still advisable.