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Port Talbot, nestled within the county borough of Neath Port Talbot in South Wales, occupies a unique and challenging geographical position. The town sprawls across a coastal plain, bordered to the north by the steep, verdant slopes of the Vale of Neath and to the south by the Bristol Channel. Its elevation is relatively low, averaging around 10 metres above sea level, making it susceptible to the trapping of pollutants. The dominant feature of the landscape is undoubtedly the steelworks, a vast industrial complex that defines the town’s character and significantly impacts its air quality. This industrial belt stretches along the coastline, historically reliant on coal and now primarily steel production. The surrounding area transitions from urban density near the town centre to more rural landscapes further inland, with agricultural land interspersed with pockets of woodland. The proximity to the Bristol Channel introduces a maritime influence, with prevailing winds often blowing onshore, carrying pollutants inland. However, these winds can also offer some dispersion. The urban-rural gradient is relatively sharp, with air quality demonstrably worsening closer to the steelworks and associated industrial activity. The topography, combined with prevailing weather patterns, creates conditions conducive to localised pollution build-up, particularly during periods of calm weather.

Port Talbot’s air quality follows a distinct seasonal pattern, heavily influenced by meteorological conditions and industrial activity. Winter (December-February) often sees poorer air quality due to temperature inversions – cold, dense air trapped beneath warmer air – preventing pollutant dispersal. Reduced sunlight also limits photochemical reactions that can break down some pollutants. Rainfall is frequent, which can temporarily cleanse the air, but also contributes to particulate matter from road runoff. Spring (March-May) brings slightly improved conditions as temperatures rise and winds become more frequent, though industrial emissions remain consistent. Summer (June-August) generally offers the best air quality, with stronger winds and higher temperatures promoting dispersion. However, occasional calm, sunny days can lead to localised ozone formation. Autumn (September-November) sees a return to poorer conditions as temperatures fall and the risk of inversions increases. November is often a particularly challenging month. Sensitive individuals – those with respiratory conditions, the elderly, and young children – should be particularly cautious during winter and autumn. Avoiding strenuous outdoor activity on still days and monitoring local conditions is advisable. Fog, common in the autumn and winter, can exacerbate particulate pollution, reducing visibility and increasing respiratory irritation.