SmogRank / Episodes / Spain

North-eastern Spain, August 2025

For 3 days, from 10 to 12 August 2025, 10 cities in Spain had PM2.5 at least twice their usual for the time of year. The worst reading was Ponferrada, Castille and León, Spain: 73.1 µg/m³ on 11 August, about 11× its usual 6.8.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached10in 1 country
Days310 to 12 August 2025
Worst day11 August8 cities counted
Furthest above usual11×Ponferrada

Day by day

11 August 8 cities at twice their usual or more
Alcalá de HenaresTorrejón de ArdozAlbaceteAlgeteCosladaSoriaValdemoroMadridManzanaresTudelaZaragozaCollado-VillalbaValenciaSaguntoCalahorraGrao de MurviedroAranda de DueroVillenaBurrianaCastelló de la PlanaOntinyentLogroñoCaravacaBenicàssimEldaMolina de SeguraMiranda de EbroAlcantarillaMurciaBurgosPamplonaAlicanteLorcaBailénTorreviejaTolosaValladolidDurangoPalenciaBarrio de PeralMedina del CampoLaudio / LlodioOriaCartagenaHernaniAmorebietaBilbaoSalouLourdesTarragonaCórdobaSalamancaTarbesles EscaldesBarcelonaSevillaPalmaMarratxíGironaPerpignanMollet del VallèsManlleuJumillaJaénLleidaFuenlabradaGasteiz / VitoriaMóstolesLeónPonferrada
7 Aug89101112131415
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

JaénJaén, 7 August: 25.9 µg/m³, 2.6× usualJaén, 8 August: 28.7 µg/m³, 2.9× usualJaén, 9 August: no readingJaén, 10 August: 26.4 µg/m³, 2.6× usualJaén, 11 August: 24.5 µg/m³, 2.5× usualJaén, 12 August: 22.2 µg/m³, 2.2× usualJaén, 13 August: no readingJaén, 14 August: 17.4 µg/m³, 1.7× usualJaén, 15 August: 19.6 µg/m³, 2.0× usualFuenlabradaFuenlabrada, 7 August: 27.7 µg/m³, 2.1× usualFuenlabrada, 8 August: 35.3 µg/m³, 2.6× usualFuenlabrada, 9 August: 29.2 µg/m³, 2.2× usualFuenlabrada, 10 August: 29.2 µg/m³, 2.2× usualFuenlabrada, 11 August: 27.4 µg/m³, 2.0× usualFuenlabrada, 12 August: 39.2 µg/m³, 2.9× usualFuenlabrada, 13 August: 22.3 µg/m³, 1.7× usualFuenlabrada, 14 August: 20.2 µg/m³, 1.5× usualFuenlabrada, 15 August: 20.4 µg/m³, 1.5× usualJumillaJumilla, 7 August: 9.3 µg/m³, 0.8× usualJumilla, 8 August: 31.0 µg/m³, 2.7× usualJumilla, 9 August: 30.0 µg/m³, 2.7× usualJumilla, 10 August: 28.0 µg/m³, 2.5× usualJumilla, 11 August: 25.0 µg/m³, 2.2× usualJumilla, 12 August: 28.5 µg/m³, 2.5× usualJumilla, 13 August: 21.7 µg/m³, 1.9× usualJumilla, 14 August: 23.4 µg/m³, 2.1× usualJumilla, 15 August: 26.1 µg/m³, 2.3× usualManlleuManlleu, 7 August: 19.5 µg/m³, 1.7× usualManlleu, 8 August: 22.4 µg/m³, 2.0× usualManlleu, 9 August: 26.3 µg/m³, 2.3× usualManlleu, 10 August: 49.6 µg/m³, 4.4× usualManlleu, 11 August: 28.7 µg/m³, 2.5× usualManlleu, 12 August: 29.5 µg/m³, 2.6× usualManlleu, 13 August: 29.3 µg/m³, 2.6× usualManlleu, 14 August: 22.7 µg/m³, 2.0× usualManlleu, 15 August: 20.0 µg/m³, 1.8× usualPonferradaPonferrada, 7 August: 19.9 µg/m³, 2.9× usualPonferrada, 8 August: 16.9 µg/m³, 2.5× usualPonferrada, 9 August: 18.6 µg/m³, 2.7× usualPonferrada, 10 August: 32.6 µg/m³, 4.8× usualPonferrada, 11 August: 73.1 µg/m³, 11× usualPonferrada, 12 August: 43.1 µg/m³, 6.3× usualPonferrada, 13 August: 79.7 µg/m³, 12× usualPonferrada, 14 August: 75.8 µg/m³, 11× usualPonferrada, 15 August: 101.0 µg/m³, 15× usualMóstolesMóstoles, 7 August: 24.1 µg/m³, 2.0× usualMóstoles, 8 August: no readingMóstoles, 9 August: 24.8 µg/m³, 2.0× usualMóstoles, 10 August: 25.1 µg/m³, 2.1× usualMóstoles, 11 August: 17.5 µg/m³, 1.4× usualMóstoles, 12 August: 41.2 µg/m³, 3.4× usualMóstoles, 13 August: no readingMóstoles, 14 August: 18.2 µg/m³, 1.5× usualMóstoles, 15 August: 22.0 µg/m³, 1.8× usualLeónLeón, 7 August: 22.1 µg/m³, 4.0× usualLeón, 8 August: 19.0 µg/m³, 3.5× usualLeón, 9 August: 16.6 µg/m³, 3.0× usualLeón, 10 August: 17.9 µg/m³, 3.3× usualLeón, 11 August: 28.4 µg/m³, 5.2× usualLeón, 12 August: 50.3 µg/m³, 9.1× usualLeón, 13 August: 51.3 µg/m³, 9.3× usualLeón, 14 August: 25.0 µg/m³, 4.5× usualLeón, 15 August: 21.7 µg/m³, 3.9× usualMollet del VallèsMollet del Vallès, 7 August: 14.5 µg/m³, 1.3× usualMollet del Vallès, 8 August: no readingMollet del Vallès, 9 August: 19.4 µg/m³, 1.7× usualMollet del Vallès, 10 August: 22.6 µg/m³, 1.9× usualMollet del Vallès, 11 August: 26.1 µg/m³, 2.3× usualMollet del Vallès, 12 August: 24.9 µg/m³, 2.1× usualMollet del Vallès, 13 August: 25.9 µg/m³, 2.2× usualMollet del Vallès, 14 August: 20.2 µg/m³, 1.7× usualMollet del Vallès, 15 August: 20.3 µg/m³, 1.8× usualLleidaLleida, 7 August: 13.9 µg/m³, 1.6× usualLleida, 8 August: 19.0 µg/m³, 2.2× usualLleida, 9 August: 18.5 µg/m³, 2.1× usualLleida, 10 August: 24.0 µg/m³, 2.7× usualLleida, 11 August: 25.9 µg/m³, 2.9× usualLleida, 12 August: 25.0 µg/m³, 2.8× usualLleida, 13 August: 20.3 µg/m³, 2.3× usualLleida, 14 August: 19.3 µg/m³, 2.2× usualLleida, 15 August: 17.8 µg/m³, 2.0× usualGasteiz / VitoriaGasteiz / Vitoria, 7 August: 16.0 µg/m³, 1.9× usualGasteiz / Vitoria, 8 August: 15.1 µg/m³, 1.8× usualGasteiz / Vitoria, 9 August: 9.7 µg/m³, 1.2× usualGasteiz / Vitoria, 10 August: 14.6 µg/m³, 1.8× usualGasteiz / Vitoria, 11 August: 25.1 µg/m³, 3.0× usualGasteiz / Vitoria, 12 August: 23.9 µg/m³, 2.9× usualGasteiz / Vitoria, 13 August: 22.2 µg/m³, 2.7× usualGasteiz / Vitoria, 14 August: 21.5 µg/m³, 2.6× usualGasteiz / Vitoria, 15 August: no reading7 Aug89101112131415
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
PonferradaCastille and León, Spain3 101.015 August6.815×
LeónCastille and León, Spain2 51.313 August5.59.3×
ManlleuCatalonia, Spain1 49.610 August11.44.4×
MóstolesMadrid, Spain2 41.212 August12.23.4×
Gasteiz / VitoriaBasque Country, Spain1 25.111 August8.33.0×
LleidaCatalonia, Spain1 25.911 August8.82.9×
FuenlabradaMadrid, Spain3 39.212 August13.52.9×
JaénAndalusia, Spain1 28.78 August10.02.9×
JumillaMurcia, Spain3 31.08 August11.32.7×
Mollet del VallèsCatalonia, Spain1 26.111 August11.62.3×

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 18 of 21 episodes in Spain since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 21.

Use this page

SmogRank, North-eastern Spain, August 2025: 10 cities with PM2.5 at twice their usual or more, 10 to 12 August 2025, smogrank.com/episodes/2025-08-north-eastern-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.