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Beniel, a municipality in the Region of Murcia, Spain, occupies a strategic, yet potentially vulnerable, position within the wider Campo de Cartagena comarca. Situated at coordinates 38.0464, -1.0014, the town lies on relatively flat terrain, part of the broader Segura River basin. This basin, historically a fertile agricultural heartland, is increasingly impacted by intensive farming practices. Beniel’s elevation is low, averaging around 80 meters above sea level, contributing to limited atmospheric dispersion of pollutants. The proximity to the Mar Menor, a large saltwater lagoon just east of Beniel, introduces complex meteorological interactions. While the sea breeze can offer some pollutant dilution, it can also trap air masses, particularly during stable atmospheric conditions. The surrounding landscape is dominated by agricultural fields – primarily intensive horticulture under plastic – and increasingly, expanding urban areas. The urban-rural gradient is relatively sharp, with Beniel transitioning quickly to agricultural land. Industrial activity is concentrated in nearby areas like Torre Pacheco, potentially contributing to regional air pollution transport. The town’s location within a valley, coupled with the prevailing wind patterns, can exacerbate pollution episodes, particularly during periods of low wind speed and temperature inversions. This geographical setting demands careful monitoring and mitigation strategies to protect air quality.

Beniel’s air quality follows a distinct seasonal pattern, heavily influenced by meteorological conditions and agricultural practices. Spring (March-May) often sees a rise in particulate matter due to agricultural activities like soil preparation and fertilizer application, exacerbated by occasional Calima events – dust storms from North Africa. Summers (June-August) are typically drier with higher temperatures, leading to increased ozone formation, particularly during prolonged periods of sunshine and stagnant air. While winds from the Mar Menor can offer some relief, they can also concentrate pollutants. Autumn (September-November) brings a temporary improvement as agricultural activity slows and rainfall increases, washing away some pollutants. However, temperature inversions become more frequent, trapping pollutants near the ground. Winter (December-February) is generally the period with the best air quality, due to reduced agricultural activity and increased precipitation. However, heating demands can lead to localised increases in particulate matter from wood burning. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during spring and summer months. Avoiding strenuous outdoor activity during peak ozone hours in summer and monitoring Calima warnings are advisable. Maintaining good ventilation indoors and using air purifiers can also help mitigate exposure.