SmogRank / Episodes / Chile

South-western Chile, August 2024

For 3 days, from 7 to 9 August 2024, 11 cities in Chile had PM2.5 at least twice their usual for the time of year. The worst reading was Puerto Varas, Los Lagos Region, Chile: 202.0 µg/m³ on 7 August, about 4.1× its usual 49.7.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached11in 1 country
Days37 to 9 August 2024
Worst day8 August7 cities counted
Furthest above usual4.1×Puerto Varas

Day by day

8 August 7 cities at twice their usual or more
Los ÁngelesNacimientoHualquiLotaCoronelChiguayanteConcepciónSan Pedro de la PazHualpénValdiviaCauquenesTalcaToméCuricóLa UniónTemucoVillarricaCuranilahueTalcahuanoChillánPuerto MonttOsornoPuerto Varas
4 Aug56789101112
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

Puerto VarasPuerto Varas, 4 August: 23.1 µg/m³, 0.5× usualPuerto Varas, 5 August: 20.3 µg/m³, 0.4× usualPuerto Varas, 6 August: 70.5 µg/m³, 1.4× usualPuerto Varas, 7 August: 202.0 µg/m³, 4.1× usualPuerto Varas, 8 August: 105.0 µg/m³, 2.1× usualPuerto Varas, 9 August: 47.4 µg/m³, 1.0× usualPuerto Varas, 10 August: 34.8 µg/m³, 0.7× usualPuerto Varas, 11 August: 72.0 µg/m³, 1.4× usualPuerto Varas, 12 August: 128.0 µg/m³, 2.6× usualOsornoOsorno, 4 August: 28.5 µg/m³, 0.5× usualOsorno, 5 August: 28.4 µg/m³, 0.5× usualOsorno, 6 August: 77.4 µg/m³, 1.5× usualOsorno, 7 August: 163.5 µg/m³, 3.1× usualOsorno, 8 August: 120.0 µg/m³, 2.3× usualOsorno, 9 August: 48.4 µg/m³, 0.9× usualOsorno, 10 August: 32.4 µg/m³, 0.6× usualOsorno, 11 August: 82.9 µg/m³, 1.6× usualOsorno, 12 August: 139.5 µg/m³, 2.7× usualLa UniónLa Unión, 4 August: 37.0 µg/m³, 0.9× usualLa Unión, 5 August: 27.4 µg/m³, 0.7× usualLa Unión, 6 August: 72.8 µg/m³, 1.8× usualLa Unión, 7 August: 89.7 µg/m³, 2.2× usualLa Unión, 8 August: 80.6 µg/m³, 2.0× usualLa Unión, 9 August: 46.3 µg/m³, 1.1× usualLa Unión, 10 August: 36.8 µg/m³, 0.9× usualLa Unión, 11 August: 60.2 µg/m³, 1.5× usualLa Unión, 12 August: 86.5 µg/m³, 2.1× usualVillarricaVillarrica, 4 August: 86.5 µg/m³, 2.3× usualVillarrica, 5 August: 23.3 µg/m³, 0.6× usualVillarrica, 6 August: 45.1 µg/m³, 1.2× usualVillarrica, 7 August: 80.0 µg/m³, 2.1× usualVillarrica, 8 August: 62.8 µg/m³, 1.7× usualVillarrica, 9 August: 84.1 µg/m³, 2.2× usualVillarrica, 10 August: 47.8 µg/m³, 1.3× usualVillarrica, 11 August: 47.3 µg/m³, 1.3× usualVillarrica, 12 August: 55.6 µg/m³, 1.5× usualTemucoTemuco, 4 August: 42.0 µg/m³, 1.1× usualTemuco, 5 August: 19.5 µg/m³, 0.5× usualTemuco, 6 August: 36.3 µg/m³, 1.0× usualTemuco, 7 August: 79.5 µg/m³, 2.1× usualTemuco, 8 August: 83.8 µg/m³, 2.2× usualTemuco, 9 August: 82.3 µg/m³, 2.2× usualTemuco, 10 August: 48.2 µg/m³, 1.3× usualTemuco, 11 August: 55.6 µg/m³, 1.5× usualTemuco, 12 August: 73.7 µg/m³, 1.9× usualPuerto MonttPuerto Montt, 4 August: 27.5 µg/m³, 0.8× usualPuerto Montt, 5 August: 22.6 µg/m³, 0.6× usualPuerto Montt, 6 August: 36.3 µg/m³, 1.0× usualPuerto Montt, 7 August: 73.0 µg/m³, 2.0× usualPuerto Montt, 8 August: 107.0 µg/m³, 3.0× usualPuerto Montt, 9 August: 44.7 µg/m³, 1.2× usualPuerto Montt, 10 August: 31.4 µg/m³, 0.9× usualPuerto Montt, 11 August: 53.4 µg/m³, 1.5× usualPuerto Montt, 12 August: 50.0 µg/m³, 1.4× usualCuranilahueCuranilahue, 4 August: 36.1 µg/m³, 0.9× usualCuranilahue, 5 August: 29.6 µg/m³, 0.8× usualCuranilahue, 6 August: 29.5 µg/m³, 0.8× usualCuranilahue, 7 August: 70.8 µg/m³, 1.8× usualCuranilahue, 8 August: 93.5 µg/m³, 2.4× usualCuranilahue, 9 August: 69.7 µg/m³, 1.8× usualCuranilahue, 10 August: 65.8 µg/m³, 1.7× usualCuranilahue, 11 August: 43.0 µg/m³, 1.1× usualCuranilahue, 12 August: 53.3 µg/m³, 1.4× usualTalcahuanoTalcahuano, 4 August: 54.7 µg/m³, 1.8× usualTalcahuano, 5 August: 22.7 µg/m³, 0.7× usualTalcahuano, 6 August: 49.9 µg/m³, 1.6× usualTalcahuano, 7 August: 53.6 µg/m³, 1.7× usualTalcahuano, 8 August: 79.5 µg/m³, 2.6× usualTalcahuano, 9 August: 71.0 µg/m³, 2.3× usualTalcahuano, 10 August: 27.6 µg/m³, 0.9× usualTalcahuano, 11 August: 27.9 µg/m³, 0.9× usualTalcahuano, 12 August: 40.6 µg/m³, 1.3× usualChillánChillán, 4 August: 60.1 µg/m³, 1.6× usualChillán, 5 August: 22.9 µg/m³, 0.6× usualChillán, 6 August: 55.9 µg/m³, 1.5× usualChillán, 7 August: 61.1 µg/m³, 1.6× usualChillán, 8 August: 72.6 µg/m³, 1.9× usualChillán, 9 August: 101.0 µg/m³, 2.7× usualChillán, 10 August: 87.3 µg/m³, 2.3× usualChillán, 11 August: 38.0 µg/m³, 1.0× usualChillán, 12 August: 25.8 µg/m³, 0.7× usualCuricóCuricó, 4 August: 49.9 µg/m³, 1.2× usualCuricó, 5 August: 32.3 µg/m³, 0.8× usualCuricó, 6 August: 23.7 µg/m³, 0.6× usualCuricó, 7 August: 25.4 µg/m³, 0.6× usualCuricó, 8 August: 53.8 µg/m³, 1.3× usualCuricó, 9 August: 91.0 µg/m³, 2.2× usualCuricó, 10 August: 127.0 µg/m³, 3.0× usualCuricó, 11 August: 29.7 µg/m³, 0.7× usualCuricó, 12 August: 26.8 µg/m³, 0.6× usualToméTomé, 4 August: 33.6 µg/m³, 1.3× usualTomé, 5 August: 20.1 µg/m³, 0.8× usualTomé, 6 August: 50.8 µg/m³, 2.0× usualTomé, 7 August: 40.5 µg/m³, 1.6× usualTomé, 8 August: 48.7 µg/m³, 1.9× usualTomé, 9 August: 52.3 µg/m³, 2.1× usualTomé, 10 August: 32.7 µg/m³, 1.3× usualTomé, 11 August: 35.0 µg/m³, 1.4× usualTomé, 12 August: 37.2 µg/m³, 1.5× usual4 Aug56789101112
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
Puerto VarasLos Lagos Region, Chile2 202.07 August49.74.1×
OsornoLos Lagos Region, Chile2 163.57 August52.03.1×
CuricóMaule Region, Chile1 127.010 August42.03.0×
Puerto MonttLos Lagos Region, Chile1 107.08 August35.93.0×
ChillánÑuble, Chile1 101.09 August37.42.7×
TalcahuanoBiobio, Chile2 79.58 August30.82.6×
CuranilahueBiobio, Chile1 93.58 August39.22.4×
VillarricaAraucania, Chile2 86.54 August37.42.3×
TemucoAraucania, Chile3 83.88 August38.02.2×
La UniónLos Ríos Region, Chile2 89.77 August41.02.2×
ToméBiobio, Chile1 52.39 August25.12.1×

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 Chile

Number 16 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, South-western Chile, August 2024: 11 cities with PM2.5 at twice their usual or more, 7 to 9 August 2024, smogrank.com/episodes/2024-08-south-western-chile (accessed 3 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.