Dawlish, a charming seaside town in South Devon, England, occupies a unique geographical position nestled between the red sandstone cliffs and the English Channel. Its location at 50.5810°N, -3.4660°W, dictates much of its character and, crucially, its air quality. The town is built on a coastal plain, with a gentle slope rising inland towards agricultural land, primarily pasture and arable farming. This relatively flat terrain allows for limited natural dispersion of pollutants. The River Daw, flowing through the town, contributes to localised humidity and can create conditions conducive to fog formation, trapping pollutants. Unlike many industrial cities, Dawlish lacks heavy industry; however, its proximity to the A379, a major coastal route, introduces a consistent source of traffic-related emissions. The surrounding landscape is dominated by the Devon countryside, offering some buffering capacity, but prevailing winds often blow onshore, carrying marine aerosols and potentially pollutants from more distant sources. The urban-rural gradient is relatively sharp, transitioning quickly from the town centre to open farmland. The town’s exposure to southwesterly winds directly from the Atlantic Ocean influences both weather patterns and the potential for airborne pollutants to reach the area. This coastal setting is a defining feature, impacting air circulation and pollutant dispersal.

Dawlish experiences a temperate maritime climate, influencing its air quality throughout the year. Winter (December-February) often sees poorer air quality due to temperature inversions, trapping pollutants from domestic heating and road traffic in the low-lying town. Calm, damp conditions exacerbate this, with fog frequently forming and reducing visibility. Spring (March-May) brings improved dispersion as winds become more frequent, though pollen counts can be high, impacting those with allergies. Summer (June-August) generally offers the best air quality, with prevailing southwesterly breezes flushing out pollutants and higher temperatures promoting dispersion. However, increased tourist traffic can lead to localised spikes in emissions around the town centre and seafront. Autumn (September-November) sees a return to more stagnant conditions, with increasing rainfall and the onset of heating season. November is often the month with the poorest air quality. Sensitive groups – the elderly, children, and those with respiratory conditions – should be particularly cautious during winter and autumn. Avoiding peak traffic hours and limiting strenuous outdoor activity on still, damp days is advisable. Monitoring local weather forecasts and being aware of pollen levels during spring are also important preventative measures.