SmogRank / Episodes / Spain

Madrid and Andalusia, Spain, April 2023

For 1 day, on 10 April 2023, 11 cities in Spain had PM2.5 at least twice their usual for the time of year. The worst reading was Toledo, Castille-La Mancha, Spain: 35.8 µg/m³ on 10 April, about 5.6× its usual 6.4.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached11in 1 country
Days110 April 2023
Worst day10 April11 cities counted
Furthest above usual5.7×Algete

Day by day

10 April 11 cities at twice their usual or more
GranadaSevillaValdemoroTorrejón de ArdozCollado-VillalbaSan RoqueAlmeríaSan FernandoHuelvaCuencaSalamancaEldaTorreviejaFaroOntinyentAlicanteValenciaSaguntoGrao de MurviedroOndaBurrianaCastelló de la PlanaAmoraCorroiosBenicàssimCacémBailénLa Línea de la ConcepciónAlcalá de HenaresCosladaMálagaMóstolesMadridAlgecirasToledoAlgeteCiudad Real
7 Apr8910111213
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

ToledoToledo, 7 April: 6.5 µg/m³, 1.0× usualToledo, 8 April: 8.3 µg/m³, 1.3× usualToledo, 9 April: 17.8 µg/m³, 2.8× usualToledo, 10 April: 35.8 µg/m³, 5.6× usualToledo, 11 April: 7.1 µg/m³, 1.1× usualToledo, 12 April: 6.8 µg/m³, 1.1× usualToledo, 13 April: 4.8 µg/m³, 0.7× usualBailénBailén, 7 April: 7.3 µg/m³, 0.7× usualBailén, 8 April: 8.6 µg/m³, 0.8× usualBailén, 9 April: 14.1 µg/m³, 1.3× usualBailén, 10 April: 31.6 µg/m³, 2.8× usualBailén, 11 April: 20.1 µg/m³, 1.8× usualBailén, 12 April: 7.5 µg/m³, 0.7× usualBailén, 13 April: 4.1 µg/m³, 0.4× usualLa Línea de la Conc…La Línea de la Concepción, 7 April: 9.7 µg/m³, 1.1× usualLa Línea de la Concepción, 8 April: 9.1 µg/m³, 1.0× usualLa Línea de la Concepción, 9 April: 11.3 µg/m³, 1.3× usualLa Línea de la Concepción, 10 April: 31.2 µg/m³, 3.5× usualLa Línea de la Concepción, 11 April: 18.2 µg/m³, 2.1× usualLa Línea de la Concepción, 12 April: 10.5 µg/m³, 1.2× usualLa Línea de la Concepción, 13 April: 11.6 µg/m³, 1.3× usualMóstolesMóstoles, 7 April: 6.1 µg/m³, 0.8× usualMóstoles, 8 April: 8.6 µg/m³, 1.1× usualMóstoles, 9 April: 16.0 µg/m³, 2.1× usualMóstoles, 10 April: 31.0 µg/m³, 4.1× usualMóstoles, 11 April: 8.8 µg/m³, 1.2× usualMóstoles, 12 April: 8.2 µg/m³, 1.1× usualMóstoles, 13 April: 4.3 µg/m³, 0.6× usualAlgecirasAlgeciras, 7 April: 6.4 µg/m³, 1.0× usualAlgeciras, 8 April: 6.2 µg/m³, 1.0× usualAlgeciras, 9 April: 8.7 µg/m³, 1.4× usualAlgeciras, 10 April: 29.8 µg/m³, 4.8× usualAlgeciras, 11 April: 11.2 µg/m³, 1.8× usualAlgeciras, 12 April: 7.1 µg/m³, 1.1× usualAlgeciras, 13 April: 3.5 µg/m³, 0.6× usualAlgeteAlgete, 7 April: 6.0 µg/m³, 1.2× usualAlgete, 8 April: 6.5 µg/m³, 1.3× usualAlgete, 9 April: 14.9 µg/m³, 3.0× usualAlgete, 10 April: 28.6 µg/m³, 5.7× usualAlgete, 11 April: 9.2 µg/m³, 1.8× usualAlgete, 12 April: 6.1 µg/m³, 1.2× usualAlgete, 13 April: 4.7 µg/m³, 0.9× usualCiudad RealCiudad Real, 7 April: 3.3 µg/m³, 0.7× usualCiudad Real, 8 April: 3.3 µg/m³, 0.7× usualCiudad Real, 9 April: 12.2 µg/m³, 2.4× usualCiudad Real, 10 April: 28.3 µg/m³, 5.7× usualCiudad Real, 11 April: 6.1 µg/m³, 1.2× usualCiudad Real, 12 April: 3.4 µg/m³, 0.7× usualCiudad Real, 13 April: 2.6 µg/m³, 0.5× usualAlcalá de HenaresAlcalá de Henares, 7 April: 9.9 µg/m³, 1.3× usualAlcalá de Henares, 8 April: 10.5 µg/m³, 1.4× usualAlcalá de Henares, 9 April: 13.8 µg/m³, 1.8× usualAlcalá de Henares, 10 April: 28.3 µg/m³, 3.7× usualAlcalá de Henares, 11 April: 12.8 µg/m³, 1.7× usualAlcalá de Henares, 12 April: 7.3 µg/m³, 0.9× usualAlcalá de Henares, 13 April: 7.1 µg/m³, 0.9× usualMadridMadrid, 7 April: 5.3 µg/m³, 0.9× usualMadrid, 8 April: 7.5 µg/m³, 1.3× usualMadrid, 9 April: 14.8 µg/m³, 2.6× usualMadrid, 10 April: 26.0 µg/m³, 4.6× usualMadrid, 11 April: 6.8 µg/m³, 1.2× usualMadrid, 12 April: 4.5 µg/m³, 0.8× usualMadrid, 13 April: 3.6 µg/m³, 0.6× usualMálagaMálaga, 7 April: 6.6 µg/m³, 1.0× usualMálaga, 8 April: 6.9 µg/m³, 1.1× usualMálaga, 9 April: 7.6 µg/m³, 1.2× usualMálaga, 10 April: 25.8 µg/m³, 4.0× usualMálaga, 11 April: 16.6 µg/m³, 2.6× usualMálaga, 12 April: 8.3 µg/m³, 1.3× usualMálaga, 13 April: 5.0 µg/m³, 0.8× usualCosladaCoslada, 7 April: 6.3 µg/m³, 0.9× usualCoslada, 8 April: 9.4 µg/m³, 1.4× usualCoslada, 9 April: 15.6 µg/m³, 2.3× usualCoslada, 10 April: 25.5 µg/m³, 3.8× usualCoslada, 11 April: 11.7 µg/m³, 1.7× usualCoslada, 12 April: 6.0 µg/m³, 0.9× usualCoslada, 13 April: 5.7 µg/m³, 0.8× usual7 Apr8910111213
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
AlgeteMadrid, Spain1 28.610 April4.75.7×
Ciudad RealCastille-La Mancha, Spain1 28.310 April3.55.7×
ToledoCastille-La Mancha, Spain1 35.810 April6.45.6×
AlgecirasAndalusia, Spain1 29.810 April6.24.8×
MadridMadrid, Spain1 26.010 April5.64.6×
MóstolesMadrid, Spain1 31.010 April7.64.1×
MálagaAndalusia, Spain1 25.810 April6.44.0×
CosladaMadrid, Spain1 25.510 April6.83.8×
Alcalá de HenaresMadrid, Spain1 28.310 April7.73.7×
La Línea de la ConcepciónAndalusia, Spain1 31.210 April8.83.5×
BailénAndalusia, Spain1 31.610 April11.12.8×

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 11 of 12 episodes in Spain since our records began, by cities reached.

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

Use this page

SmogRank, Madrid and Andalusia, Spain, April 2023: 11 cities with PM2.5 at twice their usual or more, 10 April 2023, smogrank.com/episodes/2023-04-madrid-and-andalusia-spain (accessed 2 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.