SmogRank / Episodes / Spain
North-eastern Spain, August 2025
For 2 days, from 26 to 27 August 2025, 14 cities in Spain had PM2.5 at least twice their usual for the time of year. The worst reading was León, Castille and León, Spain: 60.7 µg/m³ on 26 August, about 9.3× its usual 6.5.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 14 in 1 country
Days 2 26 to 27 August 2025
Worst day 26 August 9 cities counted
Furthest above usual 9.3× León
Day by day
Play 26 August 9 cities at twice their usual or more
Valdemoro Fuenlabrada Madrid Coslada Torrejón de Ardoz Algete Collado-Villalba Aranda de Duero Medina del Campo Soria Bailén Salamanca Burgos Córdoba Logroño Miranda de Ebro Tudela Gasteiz / Vitoria Villena Zaragoza Elda Ontinyent Valencia Pamplona Sagunto Grao de Murviedro Alcalá de Guadaira Burriana Castelló de la Plana Sevilla Alicante Barrio de Peral Cartagena Benicàssim Vila Real Huelva Lleida Ourense Paredes Lugo Salou Tarragona Lalín Ponte de Lima Vigo Pontevedra Santiago de Compostela les Escaldes Móstoles Murcia Alcantarilla Alcalá de Henares Molina de Segura Palencia Jumilla Torrevieja Jaén Manzanares Lorca Caravaca Ponferrada León 23 Aug 24 25 26 27 28 29 30 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
Ponferrada Ponferrada, 23 August: 15.1 µg/m³, 1.7× usual Ponferrada, 24 August: 48.0 µg/m³, 5.4× usual Ponferrada, 25 August: 33.2 µg/m³, 3.7× usual Ponferrada, 26 August: 36.7 µg/m³, 4.1× usual Ponferrada, 27 August: 9.7 µg/m³, 1.1× usual Ponferrada, 28 August: 3.4 µg/m³, 0.4× usual Ponferrada, 29 August: 4.3 µg/m³, 0.5× usual Ponferrada, 30 August: 3.7 µg/m³, 0.4× usual León León, 23 August: 14.5 µg/m³, 2.2× usual León, 24 August: 20.4 µg/m³, 3.1× usual León, 25 August: 19.5 µg/m³, 3.0× usual León, 26 August: 60.7 µg/m³, 9.3× usual León, 27 August: 15.6 µg/m³, 2.4× usual León, 28 August: 5.3 µg/m³, 0.8× usual León, 29 August: 2.6 µg/m³, 0.4× usual León, 30 August: 2.7 µg/m³, 0.4× usual Jaén Jaén, 23 August: 21.7 µg/m³, 2.3× usual Jaén, 24 August: no reading Jaén, 25 August: 22.6 µg/m³, 2.4× usual Jaén, 26 August: 34.3 µg/m³, 3.6× usual Jaén, 27 August: no reading Jaén, 28 August: 14.9 µg/m³, 1.6× usual Jaén, 29 August: 12.8 µg/m³, 1.3× usual Jaén, 30 August: 14.0 µg/m³, 1.5× usual Manzanares Manzanares, 23 August: 23.1 µg/m³, 2.2× usual Manzanares, 24 August: 11.7 µg/m³, 1.1× usual Manzanares, 25 August: 16.5 µg/m³, 1.6× usual Manzanares, 26 August: 33.7 µg/m³, 3.3× usual Manzanares, 27 August: 38.3 µg/m³, 3.7× usual Manzanares, 28 August: 6.9 µg/m³, 0.7× usual Manzanares, 29 August: 5.5 µg/m³, 0.5× usual Manzanares, 30 August: 5.3 µg/m³, 0.5× usual Lorca Lorca, 23 August: 19.9 µg/m³, 1.8× usual Lorca, 24 August: 14.3 µg/m³, 1.3× usual Lorca, 25 August: 22.8 µg/m³, 2.1× usual Lorca, 26 August: 31.5 µg/m³, 2.9× usual Lorca, 27 August: 41.7 µg/m³, 3.8× usual Lorca, 28 August: 17.1 µg/m³, 1.6× usual Lorca, 29 August: 10.8 µg/m³, 1.0× usual Lorca, 30 August: 7.9 µg/m³, 0.7× usual Jumilla Jumilla, 23 August: 16.2 µg/m³, 1.4× usual Jumilla, 24 August: 11.1 µg/m³, 1.0× usual Jumilla, 25 August: 18.4 µg/m³, 1.6× usual Jumilla, 26 August: 29.7 µg/m³, 2.6× usual Jumilla, 27 August: 30.7 µg/m³, 2.7× usual Jumilla, 28 August: 13.3 µg/m³, 1.2× usual Jumilla, 29 August: 5.6 µg/m³, 0.5× usual Jumilla, 30 August: 5.9 µg/m³, 0.5× usual Palencia Palencia, 23 August: 11.6 µg/m³, 1.1× usual Palencia, 24 August: 15.3 µg/m³, 1.5× usual Palencia, 25 August: 18.7 µg/m³, 1.8× usual Palencia, 26 August: 28.0 µg/m³, 2.7× usual Palencia, 27 August: 14.7 µg/m³, 1.4× usual Palencia, 28 August: 6.2 µg/m³, 0.6× usual Palencia, 29 August: 9.4 µg/m³, 0.9× usual Palencia, 30 August: 6.0 µg/m³, 0.6× usual Torrevieja Torrevieja, 23 August: 10.1 µg/m³, 1.3× usual Torrevieja, 24 August: 12.3 µg/m³, 1.6× usual Torrevieja, 25 August: 21.9 µg/m³, 2.8× usual Torrevieja, 26 August: 26.0 µg/m³, 3.4× usual Torrevieja, 27 August: 21.1 µg/m³, 2.7× usual Torrevieja, 28 August: 16.0 µg/m³, 2.1× usual Torrevieja, 29 August: 7.5 µg/m³, 1.0× usual Torrevieja, 30 August: 8.7 µg/m³, 1.1× usual Caravaca Caravaca, 23 August: 17.2 µg/m³, 1.9× usual Caravaca, 24 August: 9.8 µg/m³, 1.1× usual Caravaca, 25 August: 15.7 µg/m³, 1.7× usual Caravaca, 26 August: 25.2 µg/m³, 2.7× usual Caravaca, 27 August: 36.2 µg/m³, 3.9× usual Caravaca, 28 August: 11.2 µg/m³, 1.2× usual Caravaca, 29 August: 3.5 µg/m³, 0.4× usual Caravaca, 30 August: 3.6 µg/m³, 0.4× usual Móstoles Móstoles, 23 August: 16.7 µg/m³, 1.3× usual Móstoles, 24 August: 21.1 µg/m³, 1.7× usual Móstoles, 25 August: 15.9 µg/m³, 1.3× usual Móstoles, 26 August: no reading Móstoles, 27 August: 29.2 µg/m³, 2.3× usual Móstoles, 28 August: 6.4 µg/m³, 0.5× usual Móstoles, 29 August: 10.8 µg/m³, 0.9× usual Móstoles, 30 August: 6.7 µg/m³, 0.5× usual Alcantarilla Alcantarilla, 23 August: 13.6 µg/m³, 1.2× usual Alcantarilla, 24 August: 13.3 µg/m³, 1.1× usual Alcantarilla, 25 August: 18.8 µg/m³, 1.6× usual Alcantarilla, 26 August: 23.1 µg/m³, 2.0× usual Alcantarilla, 27 August: 28.6 µg/m³, 2.4× usual Alcantarilla, 28 August: 17.7 µg/m³, 1.5× usual Alcantarilla, 29 August: 9.4 µg/m³, 0.8× usual Alcantarilla, 30 August: 8.2 µg/m³, 0.7× usual Molina de Segura Molina de Segura, 23 August: 11.6 µg/m³, 1.1× usual Molina de Segura, 24 August: 12.3 µg/m³, 1.1× usual Molina de Segura, 25 August: 17.8 µg/m³, 1.6× usual Molina de Segura, 26 August: 22.8 µg/m³, 2.1× usual Molina de Segura, 27 August: 27.0 µg/m³, 2.5× usual Molina de Segura, 28 August: 17.6 µg/m³, 1.6× usual Molina de Segura, 29 August: 8.8 µg/m³, 0.8× usual Molina de Segura, 30 August: 11.0 µg/m³, 1.0× usual Murcia Murcia, 23 August: 13.0 µg/m³, 1.1× usual Murcia, 24 August: 12.5 µg/m³, 1.1× usual Murcia, 25 August: 18.3 µg/m³, 1.5× usual Murcia, 26 August: 22.1 µg/m³, 1.9× usual Murcia, 27 August: 26.8 µg/m³, 2.3× usual Murcia, 28 August: 18.9 µg/m³, 1.6× usual Murcia, 29 August: 10.0 µg/m³, 0.8× usual Murcia, 30 August: 10.1 µg/m³, 0.8× usual Alcalá de Henares Alcalá de Henares, 23 August: 11.3 µg/m³, 1.1× usual Alcalá de Henares, 24 August: 13.2 µg/m³, 1.3× usual Alcalá de Henares, 25 August: 13.9 µg/m³, 1.3× usual Alcalá de Henares, 26 August: 19.6 µg/m³, 1.9× usual Alcalá de Henares, 27 August: 26.2 µg/m³, 2.5× usual Alcalá de Henares, 28 August: 7.3 µg/m³, 0.7× usual Alcalá de Henares, 29 August: 14.0 µg/m³, 1.3× usual Alcalá de Henares, 30 August: 7.7 µg/m³, 0.7× usual 23 Aug 24 25 26 27 28 29 30 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
León Castille and León, Spain 1 26 August 6.5 9.3× Ponferrada Castille and León, Spain 1 24 August 8.9 5.4× Caravaca Murcia, Spain 2 27 August 9.2 3.9× Lorca Murcia, Spain 2 27 August 10.9 3.8× Manzanares Castille-La Mancha, Spain 2 27 August 10.3 3.7× Jaén Andalusia, Spain 1 26 August 9.6 3.6× Torrevieja Valencia, Spain 1 26 August 7.7 3.4× Jumilla Murcia, Spain 2 27 August 11.3 2.7× Palencia Castille and León, Spain 1 26 August 10.4 2.7× Alcalá de Henares Madrid, Spain 1 27 August 10.5 2.5× Molina de Segura Murcia, Spain 1 27 August 11.0 2.5× Alcantarilla Murcia, Spain 1 27 August 11.8 2.4× Móstoles Madrid, Spain 1 27 August 12.6 2.3× Murcia Murcia, Spain 1 27 August 11.9 2.3×
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 21 episodes in Spain since our records began, by cities reached.
North-eastern Spain and France, February 2023 72 Spain, France and Italy, December 2023 50 North-eastern Spain, August 2025 44 Canary Islands, Spain, November 2025 15 Canary Islands, Spain, December 2023 15 Canary Islands, Spain, December 2023 15 Andalusia and Madrid, Spain, July 2023 15 Canary Islands, Spain, April 2023 15 Canary Islands, Spain, February 2023 15 Canary Islands, Spain, February 2023 15 North-eastern Spain, August 2025 14 North-eastern Spain, November 2025 12 Bars: cities reached; colour: the level of the episode's highest daily reading. All 21 .
Use this page SmogRank, North-eastern Spain, August 2025: 14 cities with PM2.5 at twice their usual or more, 26 to 27 August 2025, smogrank.com/episodes/2025-08-north-eastern-spain-3 (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.
