SmogRank / Episodes / Chile

South-western Chile, August 2023

For 2 days, from 7 to 8 August 2023, 12 cities in Chile had PM2.5 at least twice their usual for the time of year. The worst reading was Temuco, Araucania, Chile: 148.5 µg/m³ on 7 August, about 3.8× its usual 38.8.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached12in 1 country
Days27 to 8 August 2023
Worst day8 August10 cities counted
Furthest above usual3.8×Temuco

Day by day

8 August 10 cities at twice their usual or more
LotaHualquiCoronelChiguayanteConcepciónSan Pedro de la PazChillánToméPuerto VarasTalcaValdiviaCauquenesSan CarlosLinaresCuranilahueLa UniónLos ÁngelesNacimientoTalcahuanoOsornoPuerto MonttTemuco
4 Aug567891011
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

OsornoOsorno, 4 August: 112.0 µg/m³, 2.2× usualOsorno, 5 August: 49.1 µg/m³, 0.9× usualOsorno, 6 August: 94.2 µg/m³, 1.8× usualOsorno, 7 August: 140.0 µg/m³, 2.7× usualOsorno, 8 August: 140.0 µg/m³, 2.7× usualOsorno, 9 August: 42.7 µg/m³, 0.8× usualOsorno, 10 August: 31.5 µg/m³, 0.6× usualOsorno, 11 August: 54.3 µg/m³, 1.0× usualPuerto MonttPuerto Montt, 4 August: 91.1 µg/m³, 2.5× usualPuerto Montt, 5 August: 25.0 µg/m³, 0.7× usualPuerto Montt, 6 August: 25.8 µg/m³, 0.7× usualPuerto Montt, 7 August: 109.8 µg/m³, 3.0× usualPuerto Montt, 8 August: 50.0 µg/m³, 1.4× usualPuerto Montt, 9 August: 21.8 µg/m³, 0.6× usualPuerto Montt, 10 August: 25.0 µg/m³, 0.7× usualPuerto Montt, 11 August: 59.3 µg/m³, 1.6× usualLa UniónLa Unión, 4 August: 83.9 µg/m³, 2.0× usualLa Unión, 5 August: 51.0 µg/m³, 1.2× usualLa Unión, 6 August: 75.8 µg/m³, 1.8× usualLa Unión, 7 August: 95.1 µg/m³, 2.3× usualLa Unión, 8 August: 80.0 µg/m³, 2.0× usualLa Unión, 9 August: 34.1 µg/m³, 0.8× usualLa Unión, 10 August: 31.2 µg/m³, 0.8× usualLa Unión, 11 August: 54.7 µg/m³, 1.3× usualSan CarlosSan Carlos, 4 August: no readingSan Carlos, 5 August: 104.0 µg/m³, 2.9× usualSan Carlos, 6 August: 49.3 µg/m³, 1.4× usualSan Carlos, 7 August: 51.5 µg/m³, 1.4× usualSan Carlos, 8 August: 78.2 µg/m³, 2.2× usualSan Carlos, 9 August: 63.3 µg/m³, 1.8× usualSan Carlos, 10 August: 25.3 µg/m³, 0.7× usualSan Carlos, 11 August: 50.0 µg/m³, 1.4× usualTemucoTemuco, 4 August: 49.6 µg/m³, 1.3× usualTemuco, 5 August: 62.5 µg/m³, 1.6× usualTemuco, 6 August: 102.0 µg/m³, 2.6× usualTemuco, 7 August: 148.5 µg/m³, 3.8× usualTemuco, 8 August: 96.2 µg/m³, 2.5× usualTemuco, 9 August: 65.1 µg/m³, 1.7× usualTemuco, 10 August: 25.9 µg/m³, 0.7× usualTemuco, 11 August: 27.4 µg/m³, 0.7× usualLos ÁngelesLos Ángeles, 4 August: 22.3 µg/m³, 0.7× usualLos Ángeles, 5 August: 52.8 µg/m³, 1.6× usualLos Ángeles, 6 August: 69.9 µg/m³, 2.1× usualLos Ángeles, 7 August: 73.6 µg/m³, 2.2× usualLos Ángeles, 8 August: 77.7 µg/m³, 2.3× usualLos Ángeles, 9 August: 63.2 µg/m³, 1.9× usualLos Ángeles, 10 August: 23.7 µg/m³, 0.7× usualLos Ángeles, 11 August: 26.4 µg/m³, 0.8× usualNacimientoNacimiento, 4 August: 45.1 µg/m³, 0.7× usualNacimiento, 5 August: 90.8 µg/m³, 1.4× usualNacimiento, 6 August: 88.0 µg/m³, 1.4× usualNacimiento, 7 August: 144.4 µg/m³, 2.3× usualNacimiento, 8 August: 136.0 µg/m³, 2.2× usualNacimiento, 9 August: 91.9 µg/m³, 1.5× usualNacimiento, 10 August: 37.9 µg/m³, 0.6× usualNacimiento, 11 August: 69.2 µg/m³, 1.1× usualCuranilahueCuranilahue, 4 August: 42.4 µg/m³, 1.1× usualCuranilahue, 5 August: 67.7 µg/m³, 1.7× usualCuranilahue, 6 August: 69.3 µg/m³, 1.8× usualCuranilahue, 7 August: 91.4 µg/m³, 2.3× usualCuranilahue, 8 August: 81.9 µg/m³, 2.1× usualCuranilahue, 9 August: 51.4 µg/m³, 1.3× usualCuranilahue, 10 August: 30.0 µg/m³, 0.8× usualCuranilahue, 11 August: 33.4 µg/m³, 0.8× usualTalcahuanoTalcahuano, 4 August: 36.6 µg/m³, 1.3× usualTalcahuano, 5 August: 43.8 µg/m³, 1.5× usualTalcahuano, 6 August: 42.3 µg/m³, 1.5× usualTalcahuano, 7 August: 61.2 µg/m³, 2.1× usualTalcahuano, 8 August: 70.9 µg/m³, 2.4× usualTalcahuano, 9 August: 29.5 µg/m³, 1.0× usualTalcahuano, 10 August: 18.0 µg/m³, 0.6× usualTalcahuano, 11 August: 43.4 µg/m³, 1.5× usualLinaresLinares, 4 August: 46.4 µg/m³, 1.3× usualLinares, 5 August: 73.7 µg/m³, 2.0× usualLinares, 6 August: 56.3 µg/m³, 1.5× usualLinares, 7 August: 50.1 µg/m³, 1.4× usualLinares, 8 August: 83.5 µg/m³, 2.3× usualLinares, 9 August: 80.4 µg/m³, 2.2× usualLinares, 10 August: 33.2 µg/m³, 0.9× usualLinares, 11 August: 40.8 µg/m³, 1.1× usualValdiviaValdivia, 4 August: 54.9 µg/m³, 1.3× usualValdivia, 5 August: 29.2 µg/m³, 0.7× usualValdivia, 6 August: 60.9 µg/m³, 1.5× usualValdivia, 7 August: 59.1 µg/m³, 1.4× usualValdivia, 8 August: 82.9 µg/m³, 2.0× usualValdivia, 9 August: 56.4 µg/m³, 1.4× usualValdivia, 10 August: 30.3 µg/m³, 0.7× usualValdivia, 11 August: 44.8 µg/m³, 1.1× usualCauquenesCauquenes, 4 August: 32.6 µg/m³, 1.1× usualCauquenes, 5 August: 44.8 µg/m³, 1.4× usualCauquenes, 6 August: 52.4 µg/m³, 1.7× usualCauquenes, 7 August: 49.7 µg/m³, 1.6× usualCauquenes, 8 August: 64.8 µg/m³, 2.1× usualCauquenes, 9 August: 65.1 µg/m³, 2.1× usualCauquenes, 10 August: 27.7 µg/m³, 0.9× usualCauquenes, 11 August: 31.6 µg/m³, 1.0× usual4 Aug567891011
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
TemucoAraucania, Chile2 148.57 August38.83.8×
Puerto MonttLos Lagos Region, Chile1 109.87 August36.83.0×
San CarlosÑuble, Chile1 104.05 August35.72.9×
OsornoLos Lagos Region, Chile2 140.07 August51.92.7×
TalcahuanoBiobio, Chile2 70.98 August29.02.4×
La UniónLos Ríos Region, Chile1 95.17 August41.02.3×
Los ÁngelesBiobio, Chile2 77.78 August33.52.3×
CuranilahueBiobio, Chile2 91.47 August39.52.3×
NacimientoBiobio, Chile2 144.47 August63.22.3×
LinaresMaule Region, Chile1 83.58 August36.82.3×
CauquenesMaule Region, Chile1 65.19 August31.02.1×
ValdiviaLos Ríos Region, Chile1 82.98 August41.02.0×

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 14 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 2023: 12 cities with PM2.5 at twice their usual or more, 7 to 8 August 2023, smogrank.com/episodes/2023-08-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.