Malgrat de Mar Air Quality Index (AQI)

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Malgrat de Mar, nestled on the Costa Brava in Catalonia, Spain, presents a unique geographic context influencing its air quality. Situated at coordinates 41.6500, 2.7500, the city enjoys a Mediterranean climate and a coastal location, directly bordering the Mediterranean Sea. The terrain is relatively flat along the coastline, gradually rising inland towards the foothills of the Catalan Coastal Range. This proximity to the sea provides moderating influences on temperature, but also introduces sea breezes that can either disperse or concentrate pollutants. The urban area of Malgrat de Mar is densely populated, typical of coastal tourist destinations, with a population of 19,377. Surrounding the city are agricultural zones, particularly vineyards and fruit orchards, alongside expanding residential and tourist infrastructure. While not directly within a major industrial belt, the broader Barcelona metropolitan area to the south contributes to regional background pollution levels. The urban-rural gradient is relatively sharp, transitioning quickly from dense urban development to agricultural land and then to more rugged, forested hills. This gradient impacts pollutant dispersion, with limited natural filtration in the immediate urban core. The prevailing wind patterns, generally from the northwest, can transport pollutants from inland areas towards the coast, affecting Malgrat de Mar’s air quality.

Malgrat de Mar’s air quality follows a distinct seasonal pattern, heavily influenced by meteorological conditions and tourist activity. Summer (June-August) often sees a slight increase in ozone levels due to high temperatures and strong sunlight reacting with vehicle emissions, though sea breezes usually provide some relief. However, the peak tourist season brings increased traffic congestion, contributing to localised particulate matter and nitrogen dioxide pollution. Autumn (September-November) typically offers the cleanest air, with cooler temperatures, increased rainfall washing away pollutants, and a decline in tourist numbers. Winter (December-February) experiences infrequent but potentially impactful temperature inversions, trapping pollutants near the ground, particularly during calm, clear weather. These inversions can lead to higher concentrations of particulate matter from wood burning for heating. Spring (March-May) sees a gradual increase in agricultural activity, potentially releasing ammonia from fertilizers, and a build-up of pollutants before the summer cleansing rains. Sensitive individuals, such as those with respiratory conditions, should be particularly cautious during summer afternoons and winter mornings. Months of September and October generally offer the most favourable conditions for outdoor activities. Fog events, though infrequent, can exacerbate particulate matter concentrations.