SmogRank / Episodes / Spain

Andalusia and Madrid, Spain, December 2024

For 2 days, from 18 to 19 December 2024, 8 cities in Spain had PM2.5 at least twice their usual for the time of year. The worst reading was Lleida, Catalonia, Spain: 49.4 µg/m³ on 18 December, about 2.3× its usual 21.1.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached8in 1 country
Days218 to 19 December 2024
Worst day18 December6 cities counted
Furthest above usual3.0×Torrejón de Ardoz

Day by day

18 December 6 cities at twice their usual or more
AlbaceteLorcaMolina de SeguraVillenaMurciaCiudad RealBailénEldaJaénValdemoroBarrio de PeralAlcalá de HenaresCartagenaAzuqueca de HenaresToledoCosladaAlicanteMadridAlgeteAlmeríaValenciaMóstolesSaguntoGrao de MurviedroOndaBurrianaCastelló de la PlanaBenicàssimMálagaZaragozaCártamaTudelaMedina del CampoValladolidPalenciaSalamancaSevillaSan RoqueSalouAlgecirasCeutaTarragonaSan FernandoVilanova i la GeltrúHuelvaPalmaMarratxíBarcelonaMollet del VallèsManlleuGironaCórdobaGranadaLleidaCuencaCollado-VillalbaFuenlabradaLa Línea de la ConcepciónTorrejón de Ardoz
15 Dec16171819202122
Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.

How it spread

LleidaLleida, 15 December: 14.9 µg/m³, 0.7× usualLleida, 16 December: 21.0 µg/m³, 1.0× usualLleida, 17 December: 35.0 µg/m³, 1.7× usualLleida, 18 December: 49.4 µg/m³, 2.3× usualLleida, 19 December: 36.3 µg/m³, 1.7× usualLleida, 20 December: 3.2 µg/m³, 0.2× usualLleida, 21 December: 19.0 µg/m³, 0.9× usualLleida, 22 December: 16.0 µg/m³, 0.8× usualCuencaCuenca, 15 December: 9.8 µg/m³, 0.9× usualCuenca, 16 December: 13.9 µg/m³, 1.3× usualCuenca, 17 December: 20.1 µg/m³, 1.9× usualCuenca, 18 December: 28.4 µg/m³, 2.6× usualCuenca, 19 December: 25.0 µg/m³, 2.3× usualCuenca, 20 December: 7.6 µg/m³, 0.7× usualCuenca, 21 December: 9.7 µg/m³, 0.9× usualCuenca, 22 December: 6.3 µg/m³, 0.6× usualCollado-VillalbaCollado-Villalba, 15 December: 18.6 µg/m³, 1.8× usualCollado-Villalba, 16 December: 16.2 µg/m³, 1.6× usualCollado-Villalba, 17 December: 17.1 µg/m³, 1.7× usualCollado-Villalba, 18 December: 27.3 µg/m³, 2.7× usualCollado-Villalba, 19 December: 21.3 µg/m³, 2.1× usualCollado-Villalba, 20 December: 8.3 µg/m³, 0.8× usualCollado-Villalba, 21 December: 15.5 µg/m³, 1.5× usualCollado-Villalba, 22 December: 11.9 µg/m³, 1.2× usualFuenlabradaFuenlabrada, 15 December: 24.3 µg/m³, 2.4× usualFuenlabrada, 16 December: 13.0 µg/m³, 1.3× usualFuenlabrada, 17 December: 17.7 µg/m³, 1.8× usualFuenlabrada, 18 December: 26.6 µg/m³, 2.7× usualFuenlabrada, 19 December: 18.7 µg/m³, 1.9× usualFuenlabrada, 20 December: 8.1 µg/m³, 0.8× usualFuenlabrada, 21 December: 12.8 µg/m³, 1.3× usualFuenlabrada, 22 December: 19.3 µg/m³, 1.9× usualGranadaGranada, 15 December: 13.3 µg/m³, 1.1× usualGranada, 16 December: 8.9 µg/m³, 0.8× usualGranada, 17 December: 15.1 µg/m³, 1.3× usualGranada, 18 December: 26.5 µg/m³, 2.2× usualGranada, 19 December: 25.5 µg/m³, 2.2× usualGranada, 20 December: 12.4 µg/m³, 1.1× usualGranada, 21 December: 11.3 µg/m³, 1.0× usualGranada, 22 December: 13.6 µg/m³, 1.2× usualTorrejón de ArdozTorrejón de Ardoz, 15 December: 17.3 µg/m³, 2.0× usualTorrejón de Ardoz, 16 December: 7.6 µg/m³, 0.9× usualTorrejón de Ardoz, 17 December: 13.5 µg/m³, 1.6× usualTorrejón de Ardoz, 18 December: 25.6 µg/m³, 3.0× usualTorrejón de Ardoz, 19 December: 21.0 µg/m³, 2.5× usualTorrejón de Ardoz, 20 December: 5.3 µg/m³, 0.6× usualTorrejón de Ardoz, 21 December: 24.0 µg/m³, 2.8× usualTorrejón de Ardoz, 22 December: 25.7 µg/m³, 3.0× usualCórdobaCórdoba, 15 December: 15.1 µg/m³, 1.2× usualCórdoba, 16 December: no readingCórdoba, 17 December: no readingCórdoba, 18 December: 21.4 µg/m³, 1.6× usualCórdoba, 19 December: 27.6 µg/m³, 2.1× usualCórdoba, 20 December: 13.4 µg/m³, 1.0× usualCórdoba, 21 December: 14.4 µg/m³, 1.1× usualCórdoba, 22 December: 14.0 µg/m³, 1.1× usualLa Línea de la Conc…La Línea de la Concepción, 15 December: 8.8 µg/m³, 1.0× usualLa Línea de la Concepción, 16 December: 8.1 µg/m³, 0.9× usualLa Línea de la Concepción, 17 December: 7.3 µg/m³, 0.8× usualLa Línea de la Concepción, 18 December: 12.7 µg/m³, 1.4× usualLa Línea de la Concepción, 19 December: 25.7 µg/m³, 2.9× usualLa Línea de la Concepción, 20 December: 9.9 µg/m³, 1.1× usualLa Línea de la Concepción, 21 December: 8.1 µg/m³, 0.9× usualLa Línea de la Concepción, 22 December: 7.1 µg/m³, 0.8× usual15 Dec16171819202122
Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
Torrejón de ArdozMadrid, Spain1 25.722 December8.53.0×
La Línea de la ConcepciónAndalusia, Spain1 25.719 December8.82.9×
Collado-VillalbaMadrid, Spain1 27.318 December10.12.7×
FuenlabradaMadrid, Spain1 26.618 December10.02.7×
CuencaCastille-La Mancha, Spain2 28.418 December10.82.6×
LleidaCatalonia, Spain1 49.418 December21.12.3×
GranadaAndalusia, Spain2 26.518 December11.82.2×
CórdobaAndalusia, Spain1 27.619 December13.12.1×

Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.

Against other episodes in Spain

Number 34 of 34 episodes in Spain since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 34.

Use this page

SmogRank, Andalusia and Madrid, Spain, December 2024: 8 cities with PM2.5 at twice their usual or more, 18 to 19 December 2024, smogrank.com/episodes/2024-12-andalusia-and-madrid-spain (accessed 3 October 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.