SmogRank / Episodes / Chile

Southern Chile, 25 to 27 May 2026

For 3 days, from 25 to 27 May 2026, 14 cities in Chile had PM2.5 at least twice their usual for the time of year. The worst reading was Linares, Maule Region, Chile: 165.0 µg/m³ on 26 May, about 3.1× its usual 52.7.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached14in 1 country
Days325 to 27 May 2026
Worst day27 May11 cities counted
Furthest above usual3.7×Los Ángeles

Day by day

27 May 11 cities at twice their usual or more
NacimientoHualquiLotaCoronelConcepciónSan Pedro de la PazCuranilahueHualpénToméTalcahuanoCauquenesCuricóRengoRancaguaPuente AltoSantiagoQuilpuéViña del MarTemucoChiguayanteTalcaTalagantePuerto VarasVillarricaLa UniónPuerto MonttOsornoChillánLinaresValdiviaSan CarlosLos Ángeles
22 May2324252627282930
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

San CarlosSan Carlos, 22 May: no readingSan Carlos, 23 May: 68.5 µg/m³San Carlos, 24 May: 64.8 µg/m³San Carlos, 25 May: 154.0 µg/m³, 3.4× its usual 45.6San Carlos, 26 May: 154.0 µg/m³, 3.3× its usual 46.2San Carlos, 27 May: 106.0 µg/m³, 2.3× its usual 46.2San Carlos, 28 May: 39.9 µg/m³San Carlos, 29 May: 66.0 µg/m³San Carlos, 30 May: 60.4 µg/m³LinaresLinares, 22 May: 50.6 µg/m³Linares, 23 May: 71.0 µg/m³Linares, 24 May: 77.7 µg/m³Linares, 25 May: 124.0 µg/m³, 2.3× its usual 53.1Linares, 26 May: 165.0 µg/m³, 3.1× its usual 52.7Linares, 27 May: 110.0 µg/m³, 2.1× its usual 52.7Linares, 28 May: 51.3 µg/m³Linares, 29 May: 71.8 µg/m³Linares, 30 May: 94.0 µg/m³ChillánChillán, 22 May: 58.8 µg/m³Chillán, 23 May: 74.4 µg/m³Chillán, 24 May: 55.6 µg/m³Chillán, 25 May: 107.8 µg/m³, 2.6× its usual 42.1Chillán, 26 May: 126.1 µg/m³, 3.0× its usual 42.6Chillán, 27 May: 111.2 µg/m³, 2.6× its usual 42.6Chillán, 28 May: 42.7 µg/m³Chillán, 29 May: 68.8 µg/m³Chillán, 30 May: 46.8 µg/m³TalaganteTalagante, 22 May: 65.8 µg/m³Talagante, 23 May: 61.0 µg/m³Talagante, 24 May: 75.1 µg/m³Talagante, 25 May: 101.0 µg/m³, 2.1× its usual 48.8Talagante, 26 May: 67.5 µg/m³Talagante, 27 May: 43.8 µg/m³Talagante, 28 May: 49.5 µg/m³Talagante, 29 May: 61.9 µg/m³Talagante, 30 May: 78.2 µg/m³Los ÁngelesLos Ángeles, 22 May: 61.4 µg/m³Los Ángeles, 23 May: 59.3 µg/m³Los Ángeles, 24 May: 60.9 µg/m³Los Ángeles, 25 May: 98.1 µg/m³, 2.8× its usual 34.6Los Ángeles, 26 May: 128.6 µg/m³, 3.7× its usual 34.8Los Ángeles, 27 May: 82.2 µg/m³, 2.4× its usual 34.8Los Ángeles, 28 May: 37.4 µg/m³Los Ángeles, 29 May: 62.0 µg/m³Los Ángeles, 30 May: 33.4 µg/m³ValdiviaValdivia, 22 May: 60.9 µg/m³Valdivia, 23 May: 64.0 µg/m³Valdivia, 24 May: 95.6 µg/m³Valdivia, 25 May: 96.7 µg/m³, 2.6× its usual 37.8Valdivia, 26 May: 123.5 µg/m³, 3.3× its usual 38.0Valdivia, 27 May: 127.0 µg/m³, 3.4× its usual 37.9Valdivia, 28 May: 45.3 µg/m³Valdivia, 29 May: 53.8 µg/m³Valdivia, 30 May: 45.1 µg/m³VillarricaVillarrica, 22 May: 11.8 µg/m³Villarrica, 23 May: 11.2 µg/m³Villarrica, 24 May: 21.2 µg/m³Villarrica, 25 May: 95.7 µg/m³, 2.2× its usual 44.3Villarrica, 26 May: 82.9 µg/m³Villarrica, 27 May: 94.2 µg/m³, 2.1× its usual 44.3Villarrica, 28 May: 50.6 µg/m³Villarrica, 29 May: 51.8 µg/m³Villarrica, 30 May: 25.5 µg/m³ChiguayanteChiguayante, 22 May: 44.0 µg/m³Chiguayante, 23 May: 47.1 µg/m³Chiguayante, 24 May: 63.3 µg/m³Chiguayante, 25 May: 65.3 µg/m³, 2.1× its usual 30.4Chiguayante, 26 May: 44.5 µg/m³Chiguayante, 27 May: 31.7 µg/m³Chiguayante, 28 May: 18.9 µg/m³Chiguayante, 29 May: 27.9 µg/m³Chiguayante, 30 May: 37.1 µg/m³OsornoOsorno, 22 May: 182.0 µg/m³Osorno, 23 May: 100.6 µg/m³Osorno, 24 May: 59.7 µg/m³Osorno, 25 May: 74.9 µg/m³Osorno, 26 May: 152.5 µg/m³, 2.6× its usual 59.2Osorno, 27 May: 157.0 µg/m³, 2.7× its usual 59.2Osorno, 28 May: 53.7 µg/m³Osorno, 29 May: 61.4 µg/m³Osorno, 30 May: 72.3 µg/m³La UniónLa Unión, 22 May: 93.8 µg/m³La Unión, 23 May: 112.0 µg/m³La Unión, 24 May: 56.0 µg/m³La Unión, 25 May: 62.3 µg/m³La Unión, 26 May: 100.0 µg/m³, 2.3× its usual 44.3La Unión, 27 May: 114.0 µg/m³, 2.6× its usual 44.3La Unión, 28 May: 40.2 µg/m³La Unión, 29 May: 35.3 µg/m³La Unión, 30 May: 68.6 µg/m³Puerto MonttPuerto Montt, 22 May: 99.0 µg/m³Puerto Montt, 23 May: 93.4 µg/m³Puerto Montt, 24 May: 28.8 µg/m³Puerto Montt, 25 May: 27.9 µg/m³Puerto Montt, 26 May: 94.2 µg/m³, 2.7× its usual 34.4Puerto Montt, 27 May: 69.9 µg/m³, 2.0× its usual 34.7Puerto Montt, 28 May: 28.0 µg/m³Puerto Montt, 29 May: 23.5 µg/m³Puerto Montt, 30 May: 23.3 µg/m³TalcaTalca, 22 May: 57.0 µg/m³Talca, 23 May: 75.8 µg/m³Talca, 24 May: 62.9 µg/m³Talca, 25 May: 73.2 µg/m³Talca, 26 May: 86.1 µg/m³, 2.1× its usual 41.2Talca, 27 May: 77.0 µg/m³Talca, 28 May: 51.5 µg/m³Talca, 29 May: 50.0 µg/m³Talca, 30 May: 52.0 µg/m³Puerto VarasPuerto Varas, 22 May: 138.0 µg/m³Puerto Varas, 23 May: 80.7 µg/m³Puerto Varas, 24 May: 29.5 µg/m³Puerto Varas, 25 May: 31.0 µg/m³Puerto Varas, 26 May: 93.9 µg/m³Puerto Varas, 27 May: 107.0 µg/m³, 2.1× its usual 50.6Puerto Varas, 28 May: 30.5 µg/m³Puerto Varas, 29 May: 24.5 µg/m³Puerto Varas, 30 May: 41.7 µg/m³TemucoTemuco, 22 May: 60.5 µg/m³Temuco, 23 May: 53.4 µg/m³Temuco, 24 May: 53.2 µg/m³Temuco, 25 May: 74.1 µg/m³Temuco, 26 May: 91.3 µg/m³Temuco, 27 May: 99.9 µg/m³, 2.0× its usual 49.2Temuco, 28 May: 33.5 µg/m³Temuco, 29 May: 59.8 µg/m³Temuco, 30 May: 56.3 µg/m³22 May2324252627282930
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
Los ÁngelesBiobio, Chile3 128.626 May34.83.7×
San CarlosÑuble, Chile3 154.025 May45.63.4×
ValdiviaLos Ríos Region, Chile3 127.027 May37.93.4×
LinaresMaule Region, Chile3 165.026 May52.73.1×
ChillánÑuble, Chile3 126.126 May42.63.0×
OsornoLos Lagos Region, Chile2 157.027 May59.22.7×
Puerto MonttLos Lagos Region, Chile2 94.226 May34.42.7×
La UniónLos Ríos Region, Chile2 114.027 May44.32.6×
VillarricaAraucania, Chile2 95.725 May44.32.2×
Puerto VarasLos Lagos Region, Chile1 107.027 May50.62.1×
TalaganteSantiago Metropolitan, Chile1 101.025 May48.82.1×
TalcaMaule Region, Chile1 86.126 May41.22.1×
ChiguayanteBiobio, Chile1 65.325 May30.42.1×
TemucoAraucania, Chile1 99.927 May49.22.0×

Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.

Against other episodes in Chile

Number 10 of 30 episodes in Chile since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 30.

Use this page

SmogRank, Southern Chile, 25 to 27 May 2026: 14 cities with PM2.5 at twice their usual or more, 25 to 27 May 2026, smogrank.com/episodes/2026-05-25-southern-chile (accessed 4 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.