SmogRank / Episodes / Spain
North-eastern Spain, April 2024
For 2 days, from 6 to 7 April 2024, 20 cities in Spain had PM2.5 at least twice their usual for the time of year. The worst reading was Bailén, Andalusia, Spain: 54.3 µg/m³ on 7 April, about 5.4× its usual 10.0.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 20 in 1 country
Days 2 6 to 7 April 2024
Worst day 7 April 19 cities counted
Furthest above usual 9.7× Jaén
Day by day
Play 7 April 19 cities at twice their usual or more
Toledo Cártama Valdemoro Fuenlabrada Sevilla Madrid Coslada Torrejón de Ardoz Collado-Villalba San Fernando Barrio de Peral Cartagena Salamanca Villena Elda Torrevieja Ontinyent Alicante Valencia Sagunto Grao de Murviedro Faro Burriana Castelló de la Plana Benicàssim Huelva San Roque Alcalá de Henares Molina de Segura Murcia Móstoles La Línea de la Concepción Algeciras Ceuta Granada Algete Azuqueca de Henares Bailén Almería Albacete Lorca Cuenca Ciudad Real Puertollano Jaén 3 Apr 4 5 6 7 8 9 10 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
Puertollano Puertollano, 3 April: no reading Puertollano, 4 April: 4.8 µg/m³, 0.8× usual Puertollano, 5 April: 7.3 µg/m³, 1.3× usual Puertollano, 6 April: 42.6 µg/m³, 7.5× usual Puertollano, 7 April: 32.0 µg/m³, 5.6× usual Puertollano, 8 April: 4.4 µg/m³, 0.8× usual Puertollano, 9 April: no reading Puertollano, 10 April: no reading Jaén Jaén, 3 April: 9.5 µg/m³, 1.7× usual Jaén, 4 April: 7.6 µg/m³, 1.4× usual Jaén, 5 April: 12.3 µg/m³, 2.2× usual Jaén, 6 April: 39.3 µg/m³, 7.0× usual Jaén, 7 April: 54.2 µg/m³, 9.7× usual Jaén, 8 April: 13.7 µg/m³, 2.4× usual Jaén, 9 April: no reading Jaén, 10 April: 4.9 µg/m³, 0.9× usual Bailén Bailén, 3 April: 6.5 µg/m³, 0.7× usual Bailén, 4 April: 13.5 µg/m³, 1.4× usual Bailén, 5 April: 16.9 µg/m³, 1.7× usual Bailén, 6 April: 38.4 µg/m³, 3.8× usual Bailén, 7 April: 54.3 µg/m³, 5.4× usual Bailén, 8 April: 11.1 µg/m³, 1.1× usual Bailén, 9 April: no reading Bailén, 10 April: 10.2 µg/m³, 1.0× usual Cuenca Cuenca, 3 April: 9.4 µg/m³, 1.1× usual Cuenca, 4 April: 9.2 µg/m³, 1.1× usual Cuenca, 5 April: 10.9 µg/m³, 1.3× usual Cuenca, 6 April: 37.6 µg/m³, 4.5× usual Cuenca, 7 April: 53.5 µg/m³, 6.4× usual Cuenca, 8 April: 22.9 µg/m³, 2.8× usual Cuenca, 9 April: no reading Cuenca, 10 April: 5.7 µg/m³, 0.7× usual Ciudad Real Ciudad Real, 3 April: 4.1 µg/m³, 0.8× usual Ciudad Real, 4 April: 4.7 µg/m³, 0.9× usual Ciudad Real, 5 April: 5.5 µg/m³, 1.1× usual Ciudad Real, 6 April: 32.0 µg/m³, 6.4× usual Ciudad Real, 7 April: 27.9 µg/m³, 5.6× usual Ciudad Real, 8 April: 4.6 µg/m³, 0.9× usual Ciudad Real, 9 April: no reading Ciudad Real, 10 April: 3.1 µg/m³, 0.6× usual Huelva Huelva, 3 April: no reading Huelva, 4 April: no reading Huelva, 5 April: no reading Huelva, 6 April: 26.6 µg/m³, 3.1× usual Huelva, 7 April: no reading Huelva, 8 April: no reading Huelva, 9 April: no reading Huelva, 10 April: 3.2 µg/m³, 0.4× usual Lorca Lorca, 3 April: 6.9 µg/m³, 1.1× usual Lorca, 4 April: 6.7 µg/m³, 1.0× usual Lorca, 5 April: 6.6 µg/m³, 1.0× usual Lorca, 6 April: 20.9 µg/m³, 3.3× usual Lorca, 7 April: 39.1 µg/m³, 6.1× usual Lorca, 8 April: 38.7 µg/m³, 6.0× usual Lorca, 9 April: no reading Lorca, 10 April: 5.0 µg/m³, 0.8× usual La Línea de la Conc… La Línea de la Concepción, 3 April: 9.9 µg/m³, 1.1× usual La Línea de la Concepción, 4 April: 10.5 µg/m³, 1.1× usual La Línea de la Concepción, 5 April: 11.2 µg/m³, 1.2× usual La Línea de la Concepción, 6 April: 21.9 µg/m³, 2.4× usual La Línea de la Concepción, 7 April: 37.4 µg/m³, 4.1× usual La Línea de la Concepción, 8 April: 8.7 µg/m³, 0.9× usual La Línea de la Concepción, 9 April: no reading La Línea de la Concepción, 10 April: 6.7 µg/m³, 0.7× usual Albacete Albacete, 3 April: no reading Albacete, 4 April: 4.1 µg/m³, 0.8× usual Albacete, 5 April: no reading Albacete, 6 April: no reading Albacete, 7 April: 32.2 µg/m³, 6.1× usual Albacete, 8 April: no reading Albacete, 9 April: no reading Albacete, 10 April: 4.9 µg/m³, 0.9× usual Murcia Murcia, 3 April: 9.5 µg/m³, 1.2× usual Murcia, 4 April: 9.0 µg/m³, 1.1× usual Murcia, 5 April: 11.0 µg/m³, 1.3× usual Murcia, 6 April: 20.0 µg/m³, 2.4× usual Murcia, 7 April: 32.2 µg/m³, 3.9× usual Murcia, 8 April: 28.4 µg/m³, 3.5× usual Murcia, 9 April: no reading Murcia, 10 April: 8.2 µg/m³, 1.0× usual Almería Almería, 3 April: 3.9 µg/m³, 0.7× usual Almería, 4 April: 5.5 µg/m³, 1.0× usual Almería, 5 April: 6.8 µg/m³, 1.2× usual Almería, 6 April: 22.3 µg/m³, 4.1× usual Almería, 7 April: 31.3 µg/m³, 5.7× usual Almería, 8 April: 9.9 µg/m³, 1.8× usual Almería, 9 April: no reading Almería, 10 April: 4.2 µg/m³, 0.8× usual San Roque San Roque, 3 April: 6.6 µg/m³, 0.7× usual San Roque, 4 April: 7.1 µg/m³, 0.8× usual San Roque, 5 April: 6.7 µg/m³, 0.8× usual San Roque, 6 April: 17.8 µg/m³, 2.0× usual San Roque, 7 April: 29.5 µg/m³, 3.4× usual San Roque, 8 April: 6.6 µg/m³, 0.7× usual San Roque, 9 April: no reading San Roque, 10 April: 6.4 µg/m³, 0.7× usual Ceuta Ceuta, 3 April: 7.5 µg/m³, 1.2× usual Ceuta, 4 April: 6.1 µg/m³, 0.9× usual Ceuta, 5 April: 5.8 µg/m³, 0.9× usual Ceuta, 6 April: 11.1 µg/m³, 1.7× usual Ceuta, 7 April: 29.2 µg/m³, 4.5× usual Ceuta, 8 April: 6.3 µg/m³, 1.0× usual Ceuta, 9 April: no reading Ceuta, 10 April: 5.0 µg/m³, 0.8× usual Algeciras Algeciras, 3 April: 5.2 µg/m³, 0.8× usual Algeciras, 4 April: 24.8 µg/m³, 3.7× usual Algeciras, 5 April: 2.2 µg/m³, 0.3× usual Algeciras, 6 April: 14.8 µg/m³, 2.2× usual Algeciras, 7 April: 28.8 µg/m³, 4.3× usual Algeciras, 8 April: 6.0 µg/m³, 0.9× usual Algeciras, 9 April: no reading Algeciras, 10 April: 4.4 µg/m³, 0.7× usual Móstoles Móstoles, 3 April: no reading Móstoles, 4 April: no reading Móstoles, 5 April: 16.9 µg/m³, 2.3× usual Móstoles, 6 April: no reading Móstoles, 7 April: 28.6 µg/m³, 4.0× usual Móstoles, 8 April: 4.3 µg/m³, 0.6× usual Móstoles, 9 April: no reading Móstoles, 10 April: 7.2 µg/m³, 1.0× usual Granada Granada, 3 April: 6.7 µg/m³, 1.1× usual Granada, 4 April: 6.3 µg/m³, 1.0× usual Granada, 5 April: 8.5 µg/m³, 1.4× usual Granada, 6 April: 23.7 µg/m³, 3.9× usual Granada, 7 April: 28.3 µg/m³, 4.6× usual Granada, 8 April: 7.7 µg/m³, 1.3× usual Granada, 9 April: no reading Granada, 10 April: 5.9 µg/m³, 1.0× usual Molina de Segura Molina de Segura, 3 April: 7.5 µg/m³, 1.0× usual Molina de Segura, 4 April: 7.7 µg/m³, 1.0× usual Molina de Segura, 5 April: 8.7 µg/m³, 1.2× usual Molina de Segura, 6 April: 18.9 µg/m³, 2.5× usual Molina de Segura, 7 April: 27.7 µg/m³, 3.7× usual Molina de Segura, 8 April: 23.0 µg/m³, 3.1× usual Molina de Segura, 9 April: no reading Molina de Segura, 10 April: 5.4 µg/m³, 0.7× usual Alcalá de Henares Alcalá de Henares, 3 April: no reading Alcalá de Henares, 4 April: 10.2 µg/m³, 1.3× usual Alcalá de Henares, 5 April: 12.1 µg/m³, 1.6× usual Alcalá de Henares, 6 April: 15.2 µg/m³, 2.0× usual Alcalá de Henares, 7 April: 27.2 µg/m³, 3.6× usual Alcalá de Henares, 8 April: 8.1 µg/m³, 1.1× usual Alcalá de Henares, 9 April: no reading Alcalá de Henares, 10 April: no reading Azuqueca de Henares Azuqueca de Henares, 3 April: no reading Azuqueca de Henares, 4 April: 5.3 µg/m³, 1.1× usual Azuqueca de Henares, 5 April: 6.6 µg/m³, 1.3× usual Azuqueca de Henares, 6 April: no reading Azuqueca de Henares, 7 April: 26.2 µg/m³, 5.2× usual Azuqueca de Henares, 8 April: 5.8 µg/m³, 1.2× usual Azuqueca de Henares, 9 April: no reading Azuqueca de Henares, 10 April: no reading Algete Algete, 3 April: 4.7 µg/m³, 0.9× usual Algete, 4 April: 7.4 µg/m³, 1.5× usual Algete, 5 April: 6.8 µg/m³, 1.4× usual Algete, 6 April: 12.7 µg/m³, 2.5× usual Algete, 7 April: 25.3 µg/m³, 5.1× usual Algete, 8 April: 4.6 µg/m³, 0.9× usual Algete, 9 April: no reading Algete, 10 April: 3.4 µg/m³, 0.7× usual 3 Apr 4 5 6 7 8 9 10 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. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Jaén Andalusia, Spain 2 7 April 5.6 9.7× Puertollano Castille-La Mancha, Spain 2 6 April 5.7 7.5× Cuenca Castille-La Mancha, Spain 2 7 April 8.3 6.4× Ciudad Real Castille-La Mancha, Spain 2 6 April 3.4 6.4× Lorca Murcia, Spain 1 7 April 6.4 6.1× Albacete Castille-La Mancha, Spain 1 7 April 5.3 6.1× Almería Andalusia, Spain 1 7 April 5.5 5.7× Bailén Andalusia, Spain 2 7 April 10.0 5.4× Azuqueca de Henares Castille-La Mancha, Spain 1 7 April 4.8 5.2× Algete Madrid, Spain 1 7 April 4.6 5.1× Granada Andalusia, Spain 1 7 April 6.1 4.6× Ceuta Ceuta, Spain 1 7 April 6.5 4.5× Algeciras Andalusia, Spain 1 7 April 6.7 4.3× La Línea de la Concepción Andalusia, Spain 1 7 April 9.2 4.1× Móstoles Madrid, Spain 1 7 April 7.2 4.0× Murcia Murcia, Spain 1 7 April 8.2 3.9× Molina de Segura Murcia, Spain 1 7 April 7.5 3.7× Alcalá de Henares Madrid, Spain 1 7 April 7.6 3.6× San Roque Andalusia, Spain 1 7 April 8.8 3.4× Huelva Andalusia, Spain 1 6 April 8.6 3.1×
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 7 of 34 episodes in Spain since our records began, by cities reached.
North-eastern Spain and France, February 2023 72 North-eastern Spain, August 2025 44 North-eastern Spain and France, December 2023 to January 2024 44 South-western Europe, February 2024 37 North-eastern Spain and France, January and February 2024 33 North-eastern Spain, October 2024 23 North-eastern Spain, April 2024 20 Canary Islands, Spain, November 2025 15 Canary Islands, Spain, December 2024 15 Canary Islands, Spain, February 2024 15 Canary Islands, Spain, December 2023 15 Canary Islands, Spain, December 2023 15 Bars: cities reached; colour: the level of the episode's highest daily reading. All 34 .
Use this page SmogRank, North-eastern Spain, April 2024: 20 cities with PM2.5 at twice their usual or more, 6 to 7 April 2024, smogrank.com/episodes/2024-04-north-eastern-spain (accessed 3 October 2026).
Copy citation Download top 10 (PNG)
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.
