SmogRank / Episodes / Chile

South-western Chile, August 2026

For 1 day, on 13 August 2026, 10 cities in Chile had PM2.5 at least twice their usual for the time of year. The worst reading was Osorno, Los Lagos Region, Chile: 161.5 µg/m³ on 13 August, about 3.2× its usual 50.0.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached10in 1 country
Days113 August 2026
Worst day13 August10 cities counted
Furthest above usual3.2×Osorno

Day by day

13 August 10 cities at twice their usual or more
NacimientoLotaHualquiCoronelChiguayanteConcepciónSan Pedro de la PazHualpénChillánToméSan CarlosCauquenesPuerto MonttTalcaCuranilahueTemucoLinaresTalcahuanoVillarricaValdiviaLa UniónLos ÁngelesPuerto VarasOsorno
10 Aug111213141516
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

CuranilahueCuranilahue, 10 August: 91.5 µg/m³, 2.4× usualCuranilahue, 11 August: 79.2 µg/m³, 2.1× usualCuranilahue, 12 August: 78.5 µg/m³, 2.0× usualCuranilahue, 13 August: 78.0 µg/m³, 2.0× usualCuranilahue, 14 August: 57.0 µg/m³, 1.5× usualCuranilahue, 15 August: 20.7 µg/m³, 0.5× usualCuranilahue, 16 August: 38.1 µg/m³, 1.0× usualPuerto VarasPuerto Varas, 10 August: 81.3 µg/m³, 1.7× usualPuerto Varas, 11 August: 128.0 µg/m³, 2.7× usualPuerto Varas, 12 August: 127.0 µg/m³, 2.6× usualPuerto Varas, 13 August: 151.0 µg/m³, 3.1× usualPuerto Varas, 14 August: 90.1 µg/m³, 1.9× usualPuerto Varas, 15 August: 29.2 µg/m³, 0.6× usualPuerto Varas, 16 August: 80.0 µg/m³, 1.7× usualTalcahuanoTalcahuano, 10 August: 46.3 µg/m³, 1.6× usualTalcahuano, 11 August: 80.7 µg/m³, 2.8× usualTalcahuano, 12 August: 41.6 µg/m³, 1.4× usualTalcahuano, 13 August: 59.7 µg/m³, 2.1× usualTalcahuano, 14 August: 28.4 µg/m³, 1.0× usualTalcahuano, 15 August: 15.2 µg/m³, 0.5× usualTalcahuano, 16 August: 27.0 µg/m³, 0.9× usualOsornoOsorno, 10 August: 37.5 µg/m³, 0.8× usualOsorno, 11 August: 97.2 µg/m³, 1.9× usualOsorno, 12 August: 149.0 µg/m³, 3.0× usualOsorno, 13 August: 161.5 µg/m³, 3.2× usualOsorno, 14 August: 94.6 µg/m³, 1.9× usualOsorno, 15 August: 32.9 µg/m³, 0.7× usualOsorno, 16 August: 47.3 µg/m³, 0.9× usualValdiviaValdivia, 10 August: 34.2 µg/m³, 0.9× usualValdivia, 11 August: 71.4 µg/m³, 1.8× usualValdivia, 12 August: 68.7 µg/m³, 1.7× usualValdivia, 13 August: 101.3 µg/m³, 2.5× usualValdivia, 14 August: 105.5 µg/m³, 2.6× usualValdivia, 15 August: 36.2 µg/m³, 0.9× usualValdivia, 16 August: 73.4 µg/m³, 1.8× usualLa UniónLa Unión, 10 August: 38.7 µg/m³, 1.0× usualLa Unión, 11 August: 55.5 µg/m³, 1.4× usualLa Unión, 12 August: 62.5 µg/m³, 1.6× usualLa Unión, 13 August: 99.3 µg/m³, 2.6× usualLa Unión, 14 August: 57.8 µg/m³, 1.5× usualLa Unión, 15 August: 24.4 µg/m³, 0.6× usualLa Unión, 16 August: 41.6 µg/m³, 1.1× usualLos ÁngelesLos Ángeles, 10 August: 33.8 µg/m³, 1.1× usualLos Ángeles, 11 August: 44.4 µg/m³, 1.4× usualLos Ángeles, 12 August: 45.7 µg/m³, 1.5× usualLos Ángeles, 13 August: 86.0 µg/m³, 2.8× usualLos Ángeles, 14 August: 57.1 µg/m³, 1.8× usualLos Ángeles, 15 August: 15.8 µg/m³, 0.5× usualLos Ángeles, 16 August: 22.4 µg/m³, 0.7× usualVillarricaVillarrica, 10 August: 13.2 µg/m³, 0.3× usualVillarrica, 11 August: 15.9 µg/m³, 0.4× usualVillarrica, 12 August: 34.0 µg/m³, 0.9× usualVillarrica, 13 August: 80.5 µg/m³, 2.1× usualVillarrica, 14 August: 24.8 µg/m³, 0.7× usualVillarrica, 15 August: 19.5 µg/m³, 0.5× usualVillarrica, 16 August: 31.5 µg/m³, 0.8× usualLinaresLinares, 10 August: 53.3 µg/m³, 1.5× usualLinares, 11 August: 49.8 µg/m³, 1.4× usualLinares, 12 August: 40.5 µg/m³, 1.1× usualLinares, 13 August: 75.6 µg/m³, 2.1× usualLinares, 14 August: 64.0 µg/m³, 1.8× usualLinares, 15 August: 18.4 µg/m³, 0.5× usualLinares, 16 August: 29.3 µg/m³, 0.8× usualTemucoTemuco, 10 August: 21.0 µg/m³, 0.6× usualTemuco, 11 August: 41.5 µg/m³, 1.1× usualTemuco, 12 August: 35.5 µg/m³, 1.0× usualTemuco, 13 August: 73.0 µg/m³, 2.0× usualTemuco, 14 August: 61.7 µg/m³, 1.7× usualTemuco, 15 August: 17.7 µg/m³, 0.5× usualTemuco, 16 August: 31.1 µg/m³, 0.9× usual10 Aug111213141516
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
OsornoLos Lagos Region, Chile1 161.513 August50.03.2×
Puerto VarasLos Lagos Region, Chile1 151.013 August48.33.1×
TalcahuanoBiobio, Chile1 80.711 August29.02.8×
Los ÁngelesBiobio, Chile1 86.013 August31.22.8×
ValdiviaLos Ríos Region, Chile1 105.514 August40.02.6×
La UniónLos Ríos Region, Chile1 99.313 August38.62.6×
CuranilahueBiobio, Chile1 91.510 August38.62.4×
LinaresMaule Region, Chile1 75.613 August35.72.1×
VillarricaAraucania, Chile1 80.513 August38.12.1×
TemucoAraucania, Chile1 73.013 August36.32.0×

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 Chile

Number 7 of 11 episodes in Chile since our records began, by cities reached.

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

Use this page

SmogRank, South-western Chile, August 2026: 10 cities with PM2.5 at twice their usual or more, 13 August 2026, smogrank.com/episodes/2026-08-south-western-chile (accessed 2 October 2026).

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.