SmogRank / Episodes / Chile

South-western Chile, 17 to 20 June 2023

For 4 days, from 17 to 20 June 2023, 14 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: 212.0 µg/m³ on 20 June, about 3.9× its usual 54.8.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached14in 1 country
Days417 to 20 June 2023
Worst day20 June9 cities counted
Furthest above usual3.9×Puerto Varas

Day by day

20 June 9 cities at twice their usual or more
HualquiCoronelValdiviaChiguayanteConcepciónSan Pedro de la PazHualpénTalcahuanoToméCuricóTalcaLinaresOsornoLotaCauquenesLa UniónNacimientoTemucoLos ÁngelesChillánSan CarlosCuranilahuePuerto MonttPuerto Varas
14 Jun151617181920212223
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, 14 June: 69.0 µg/m³Osorno, 15 June: 44.7 µg/m³Osorno, 16 June: 39.1 µg/m³Osorno, 17 June: 132.0 µg/m³, 2.0× its usual 64.6Osorno, 18 June: 86.2 µg/m³Osorno, 19 June: 74.6 µg/m³Osorno, 20 June: 125.0 µg/m³, 2.0× its usual 61.5Osorno, 21 June: 48.0 µg/m³Osorno, 22 June: no readingOsorno, 23 June: 37.7 µg/m³Puerto MonttPuerto Montt, 14 June: 46.5 µg/m³Puerto Montt, 15 June: 34.7 µg/m³Puerto Montt, 16 June: 36.1 µg/m³Puerto Montt, 17 June: 127.6 µg/m³, 3.3× its usual 38.7Puerto Montt, 18 June: 136.0 µg/m³, 3.6× its usual 37.3Puerto Montt, 19 June: 64.0 µg/m³Puerto Montt, 20 June: 114.3 µg/m³, 2.9× its usual 39.3Puerto Montt, 21 June: 34.9 µg/m³Puerto Montt, 22 June: no readingPuerto Montt, 23 June: 37.2 µg/m³Puerto VarasPuerto Varas, 14 June: 56.1 µg/m³Puerto Varas, 15 June: 35.2 µg/m³Puerto Varas, 16 June: 55.2 µg/m³Puerto Varas, 17 June: 115.0 µg/m³, 2.2× its usual 52.6Puerto Varas, 18 June: 114.0 µg/m³, 2.2× its usual 51.8Puerto Varas, 19 June: 87.5 µg/m³Puerto Varas, 20 June: 212.0 µg/m³, 3.9× its usual 54.8Puerto Varas, 21 June: 30.5 µg/m³Puerto Varas, 22 June: no readingPuerto Varas, 23 June: 100.0 µg/m³La UniónLa Unión, 14 June: 73.5 µg/m³La Unión, 15 June: 43.1 µg/m³La Unión, 16 June: 44.6 µg/m³La Unión, 17 June: 109.0 µg/m³, 2.2× its usual 48.6La Unión, 18 June: 68.9 µg/m³La Unión, 19 June: 54.0 µg/m³La Unión, 20 June: 53.3 µg/m³La Unión, 21 June: 42.3 µg/m³La Unión, 22 June: no readingLa Unión, 23 June: 39.0 µg/m³TemucoTemuco, 14 June: 141.0 µg/m³Temuco, 15 June: 133.0 µg/m³Temuco, 16 June: 49.8 µg/m³Temuco, 17 June: 104.0 µg/m³, 2.0× its usual 52.0Temuco, 18 June: 143.0 µg/m³, 2.8× its usual 51.3Temuco, 19 June: 131.0 µg/m³, 2.5× its usual 52.0Temuco, 20 June: 155.0 µg/m³, 3.0× its usual 52.1Temuco, 21 June: 81.0 µg/m³Temuco, 22 June: no readingTemuco, 23 June: 25.8 µg/m³CauquenesCauquenes, 14 June: 47.6 µg/m³Cauquenes, 15 June: 51.9 µg/m³Cauquenes, 16 June: 49.4 µg/m³Cauquenes, 17 June: 85.5 µg/m³, 2.1× its usual 41.5Cauquenes, 18 June: 73.0 µg/m³Cauquenes, 19 June: 92.2 µg/m³, 2.2× its usual 41.8Cauquenes, 20 June: 72.9 µg/m³Cauquenes, 21 June: 42.6 µg/m³Cauquenes, 22 June: no readingCauquenes, 23 June: 14.2 µg/m³CuranilahueCuranilahue, 14 June: 84.1 µg/m³Curanilahue, 15 June: 52.9 µg/m³Curanilahue, 16 June: 24.2 µg/m³Curanilahue, 17 June: 91.5 µg/m³Curanilahue, 18 June: 169.0 µg/m³, 3.2× its usual 52.8Curanilahue, 19 June: 183.0 µg/m³, 3.5× its usual 52.2Curanilahue, 20 June: 81.8 µg/m³Curanilahue, 21 June: 49.8 µg/m³Curanilahue, 22 June: no readingCuranilahue, 23 June: 38.7 µg/m³San CarlosSan Carlos, 14 June: 165.0 µg/m³San Carlos, 15 June: 73.1 µg/m³San Carlos, 16 June: 45.8 µg/m³San Carlos, 17 June: 70.5 µg/m³San Carlos, 18 June: 146.0 µg/m³, 3.2× its usual 45.1San Carlos, 19 June: 153.0 µg/m³, 3.4× its usual 45.4San Carlos, 20 June: 110.0 µg/m³, 2.5× its usual 44.2San Carlos, 21 June: 50.9 µg/m³San Carlos, 22 June: no readingSan Carlos, 23 June: 12.8 µg/m³ChillánChillán, 14 June: 207.0 µg/m³Chillán, 15 June: 75.3 µg/m³Chillán, 16 June: 35.2 µg/m³Chillán, 17 June: 67.5 µg/m³Chillán, 18 June: 125.7 µg/m³, 3.0× its usual 42.6Chillán, 19 June: 131.5 µg/m³, 3.2× its usual 40.9Chillán, 20 June: 102.7 µg/m³, 2.5× its usual 40.9Chillán, 21 June: 55.4 µg/m³Chillán, 22 June: no readingChillán, 23 June: 18.8 µg/m³Los ÁngelesLos Ángeles, 14 June: 22.1 µg/m³Los Ángeles, 15 June: 34.9 µg/m³Los Ángeles, 16 June: 22.3 µg/m³Los Ángeles, 17 June: 40.3 µg/m³Los Ángeles, 18 June: 96.3 µg/m³, 2.4× its usual 39.5Los Ángeles, 19 June: 123.2 µg/m³, 3.1× its usual 39.5Los Ángeles, 20 June: 99.3 µg/m³, 2.5× its usual 39.5Los Ángeles, 21 June: 56.6 µg/m³Los Ángeles, 22 June: no readingLos Ángeles, 23 June: 13.6 µg/m³LotaLota, 14 June: 49.0 µg/m³Lota, 15 June: 33.6 µg/m³Lota, 16 June: 25.3 µg/m³Lota, 17 June: 35.3 µg/m³Lota, 18 June: 41.9 µg/m³, 2.1× its usual 19.9Lota, 19 June: 31.3 µg/m³Lota, 20 June: 26.9 µg/m³Lota, 21 June: 27.3 µg/m³Lota, 22 June: no readingLota, 23 June: 13.0 µg/m³NacimientoNacimiento, 14 June: 139.2 µg/m³Nacimiento, 15 June: no readingNacimiento, 16 June: no readingNacimiento, 17 June: no readingNacimiento, 18 June: no readingNacimiento, 19 June: 167.5 µg/m³, 2.3× its usual 72.6Nacimiento, 20 June: 150.0 µg/m³, 2.1× its usual 72.6Nacimiento, 21 June: 90.7 µg/m³Nacimiento, 22 June: no readingNacimiento, 23 June: 32.8 µg/m³TalcaTalca, 14 June: 68.3 µg/m³Talca, 15 June: 61.6 µg/m³Talca, 16 June: 39.6 µg/m³Talca, 17 June: 31.9 µg/m³Talca, 18 June: 38.3 µg/m³Talca, 19 June: 87.7 µg/m³, 2.0× its usual 43.4Talca, 20 June: 64.4 µg/m³Talca, 21 June: 42.0 µg/m³Talca, 22 June: no readingTalca, 23 June: 11.8 µg/m³LinaresLinares, 14 June: 137.0 µg/m³Linares, 15 June: 136.0 µg/m³Linares, 16 June: 75.0 µg/m³Linares, 17 June: 42.8 µg/m³Linares, 18 June: 47.0 µg/m³Linares, 19 June: 92.4 µg/m³Linares, 20 June: 116.0 µg/m³, 2.0× its usual 57.6Linares, 21 June: 83.0 µg/m³Linares, 22 June: no readingLinares, 23 June: no reading14 Jun151617181920212223
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, Chile3 212.020 June54.83.9×
Puerto MonttLos Lagos Region, Chile3 136.018 June37.33.6×
CuranilahueBiobio, Chile2 183.019 June52.23.5×
San CarlosÑuble, Chile3 153.019 June45.43.4×
ChillánÑuble, Chile3 131.519 June40.93.2×
Los ÁngelesBiobio, Chile3 123.219 June39.53.1×
TemucoAraucania, Chile4 155.020 June52.13.0×
NacimientoBiobio, Chile2 167.519 June72.62.3×
La UniónLos Ríos Region, Chile1 109.017 June48.62.2×
CauquenesMaule Region, Chile2 92.219 June41.82.2×
LotaBiobio, Chile1 41.918 June19.92.1×
OsornoLos Lagos Region, Chile2 132.017 June64.62.0×
LinaresMaule Region, Chile1 116.020 June57.62.0×
TalcaMaule Region, Chile1 87.719 June43.42.0×

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 11 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, 17 to 20 June 2023: 14 cities with PM2.5 at twice their usual or more, 17 to 20 June 2023, smogrank.com/episodes/2023-06-17-south-western-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.