Briefing
A scientific analysis by the Universidad de Huelva, based on samples from 2021 to 2023, concludes that nine of the 21 monitoring stations studied in Andalusia exceed the European Union’s 2030 target of 20 micrograms per cubic metre (µg/m³) for PM10 even after the contribution from natural Saharan dust has been subtracted mathematically. The study, published in the journal Environmental Pollution, examined not only particulate matter concentrations but also used chemical analyses to determine the proportions attributable to different sources, making it possible to distinguish natural sources (such as mineral dust and sea salt) from human-made sources (such as combustion, traffic and industry).
Before adjustment for Saharan dust, 18 of the 21 stations were above the 20 µg/m³ reference value; after adjustment, nine problem sites remained. The monitoring locations listed include Alcalá de Guadaíra, Villanueva del Arzobispo, the traffic-side Torneo station in Seville and other monitoring stations in Granada and Moguer. The researchers estimate that the required reductions in human-made contributions at the affected stations would need to range from around five per cent to about 50 per cent, depending on location, to meet the target.
The study identifies combustion as the main human-made source; vehicle traffic and mechanical abrasion dominate at urban traffic hotspots. The authors stress that occasional episodes of heavy Saharan dust cannot fully explain annual averages and that targeted local measures are needed. For traffic areas, they suggest measures that can quickly reduce exhaust emissions and abrasion; in industrial areas, they recommend low-emission processes and improved dust management.
Regional air quality reports from the Junta de Andalucía broadly confirm the geographically varied pollution levels, but do not provide the same breakdown of source contributions. The study therefore provides a more detailed basis for prioritising technical mitigation measures, without prescribing political decisions. Meteorology and episodic transport remain clearly visible as influencing factors.
Editor: Andreas M. Brucker (Article created with AI assistance).