SmogRank / Episodes / Chile

Southern Chile, 30 to 31 July 2024

For 2 days, from 30 to 31 July 2024, 17 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: 180.0 µg/m³ on 30 July, about 3.2× its usual 55.7.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached17in 1 country
Days230 to 31 July 2024
Worst day30 July14 cities counted
Furthest above usual3.2×Osorno

Day by day

30 July 14 cities at twice their usual or more
TemucoCuranilahueConcepciónSan Pedro de la PazToméTalcahuanoLa UniónPuerto MonttTalagantePuente AltoCuricóChiguayanteRancaguaPuerto VarasHualpénNacimientoRengoVillarricaTalcaCoronelHualquiLotaChillánValdiviaCauquenesLos ÁngelesOsorno
27 Jul282930311 Aug23
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, 27 July: 51.9 µg/m³Osorno, 28 July: 160.5 µg/m³Osorno, 29 July: 133.0 µg/m³Osorno, 30 July: 180.0 µg/m³, 3.2× its usual 55.7Osorno, 31 July: 60.3 µg/m³Osorno, 1 August: 27.7 µg/m³Osorno, 2 August: 29.4 µg/m³Osorno, 3 August: 35.9 µg/m³NacimientoNacimiento, 27 July: 87.4 µg/m³Nacimiento, 28 July: 31.9 µg/m³Nacimiento, 29 July: 81.1 µg/m³Nacimiento, 30 July: 139.5 µg/m³, 2.1× its usual 66.9Nacimiento, 31 July: 127.0 µg/m³Nacimiento, 1 August: no readingNacimiento, 2 August: no readingNacimiento, 3 August: 48.3 µg/m³HualpénHualpén, 27 July: 86.3 µg/m³Hualpén, 28 July: 75.9 µg/m³Hualpén, 29 July: 69.6 µg/m³Hualpén, 30 July: 111.0 µg/m³, 2.1× its usual 53.5Hualpén, 31 July: 40.0 µg/m³Hualpén, 1 August: no readingHualpén, 2 August: no readingHualpén, 3 August: 63.3 µg/m³Puerto VarasPuerto Varas, 27 July: 56.6 µg/m³Puerto Varas, 28 July: 76.3 µg/m³Puerto Varas, 29 July: 92.7 µg/m³Puerto Varas, 30 July: 110.0 µg/m³, 2.1× its usual 53.2Puerto Varas, 31 July: 25.9 µg/m³Puerto Varas, 1 August: no readingPuerto Varas, 2 August: no readingPuerto Varas, 3 August: 34.3 µg/m³VillarricaVillarrica, 27 July: 96.4 µg/m³Villarrica, 28 July: 67.3 µg/m³Villarrica, 29 July: 39.5 µg/m³Villarrica, 30 July: 106.0 µg/m³, 2.1× its usual 51.0Villarrica, 31 July: 115.0 µg/m³, 2.2× its usual 52.8Villarrica, 1 August: 20.7 µg/m³Villarrica, 2 August: no readingVillarrica, 3 August: 34.0 µg/m³ValdiviaValdivia, 27 July: no readingValdivia, 28 July: no readingValdivia, 29 July: no readingValdivia, 30 July: 102.0 µg/m³, 2.4× its usual 42.3Valdivia, 31 July: 107.0 µg/m³, 2.5× its usual 43.2Valdivia, 1 August: 25.3 µg/m³Valdivia, 2 August: no readingValdivia, 3 August: 22.5 µg/m³HualquiHualqui, 27 July: 47.5 µg/m³Hualqui, 28 July: 43.5 µg/m³Hualqui, 29 July: 80.9 µg/m³Hualqui, 30 July: 102.0 µg/m³, 2.4× its usual 41.9Hualqui, 31 July: 86.4 µg/m³, 2.1× its usual 41.9Hualqui, 1 August: 23.5 µg/m³Hualqui, 2 August: 21.4 µg/m³Hualqui, 3 August: 27.1 µg/m³ChillánChillán, 27 July: 30.2 µg/m³Chillán, 28 July: 21.3 µg/m³Chillán, 29 July: 41.4 µg/m³Chillán, 30 July: 98.0 µg/m³, 2.5× its usual 39.9Chillán, 31 July: 88.3 µg/m³, 2.2× its usual 39.8Chillán, 1 August: 25.6 µg/m³Chillán, 2 August: 18.7 µg/m³Chillán, 3 August: 25.4 µg/m³CoronelCoronel, 27 July: 55.4 µg/m³Coronel, 28 July: 45.4 µg/m³Coronel, 29 July: 76.7 µg/m³Coronel, 30 July: 97.8 µg/m³, 2.4× its usual 40.3Coronel, 31 July: 60.5 µg/m³Coronel, 1 August: 24.0 µg/m³Coronel, 2 August: no readingCoronel, 3 August: 29.6 µg/m³CuricóCuricó, 27 July: 40.5 µg/m³Curicó, 28 July: no readingCuricó, 29 July: 44.1 µg/m³Curicó, 30 July: 94.7 µg/m³, 2.0× its usual 46.4Curicó, 31 July: 82.2 µg/m³Curicó, 1 August: 29.8 µg/m³Curicó, 2 August: 20.2 µg/m³Curicó, 3 August: 20.8 µg/m³Los ÁngelesLos Ángeles, 27 July: 51.3 µg/m³Los Ángeles, 28 July: 26.8 µg/m³Los Ángeles, 29 July: 28.4 µg/m³Los Ángeles, 30 July: 91.2 µg/m³, 2.4× its usual 37.4Los Ángeles, 31 July: 111.0 µg/m³, 3.1× its usual 36.3Los Ángeles, 1 August: 27.3 µg/m³Los Ángeles, 2 August: 20.3 µg/m³Los Ángeles, 3 August: 20.4 µg/m³TalcaTalca, 27 July: 33.0 µg/m³Talca, 28 July: 22.0 µg/m³Talca, 29 July: 42.8 µg/m³Talca, 30 July: 86.3 µg/m³, 2.4× its usual 36.6Talca, 31 July: 74.0 µg/m³Talca, 1 August: 21.8 µg/m³Talca, 2 August: 14.7 µg/m³Talca, 3 August: 18.9 µg/m³ChiguayanteChiguayante, 27 July: 39.5 µg/m³Chiguayante, 28 July: 35.3 µg/m³Chiguayante, 29 July: 40.6 µg/m³Chiguayante, 30 July: 58.5 µg/m³, 2.1× its usual 27.6Chiguayante, 31 July: 45.6 µg/m³Chiguayante, 1 August: 21.0 µg/m³Chiguayante, 2 August: 21.1 µg/m³Chiguayante, 3 August: 20.7 µg/m³LotaLota, 27 July: 19.8 µg/m³Lota, 28 July: no readingLota, 29 July: 40.4 µg/m³Lota, 30 July: 48.3 µg/m³, 2.5× its usual 19.4Lota, 31 July: no readingLota, 1 August: no readingLota, 2 August: no readingLota, 3 August: no readingRancaguaRancagua, 27 July: 44.4 µg/m³Rancagua, 28 July: 52.5 µg/m³Rancagua, 29 July: 79.4 µg/m³Rancagua, 30 July: 71.8 µg/m³Rancagua, 31 July: 95.8 µg/m³, 2.1× its usual 44.7Rancagua, 1 August: 53.4 µg/m³Rancagua, 2 August: 24.8 µg/m³Rancagua, 3 August: 16.0 µg/m³RengoRengo, 27 July: 38.7 µg/m³Rengo, 28 July: 51.8 µg/m³Rengo, 29 July: no readingRengo, 30 July: 84.7 µg/m³Rengo, 31 July: 95.3 µg/m³, 2.2× its usual 43.8Rengo, 1 August: 60.1 µg/m³Rengo, 2 August: no readingRengo, 3 August: 18.0 µg/m³CauquenesCauquenes, 27 July: 30.6 µg/m³Cauquenes, 28 July: 23.3 µg/m³Cauquenes, 29 July: 45.7 µg/m³Cauquenes, 30 July: 63.2 µg/m³Cauquenes, 31 July: 93.7 µg/m³, 2.9× its usual 32.8Cauquenes, 1 August: 20.5 µg/m³Cauquenes, 2 August: 18.0 µg/m³Cauquenes, 3 August: 28.5 µg/m³27 Jul282930311 Aug23
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 180.030 July55.73.2×
Los ÁngelesBiobio, Chile2 111.031 July36.33.1×
CauquenesMaule Region, Chile1 93.731 July32.82.9×
ValdiviaLos Ríos Region, Chile2 107.031 July43.22.5×
ChillánÑuble, Chile2 98.030 July39.92.5×
LotaBiobio, Chile1 48.330 July19.42.5×
HualquiBiobio, Chile2 102.030 July41.92.4×
CoronelBiobio, Chile1 97.830 July40.32.4×
TalcaMaule Region, Chile1 86.330 July36.62.4×
VillarricaAraucania, Chile2 115.031 July52.82.2×
RengoO'Higgins Region, Chile1 95.331 July43.82.2×
NacimientoBiobio, Chile1 139.530 July66.92.1×
HualpénBiobio, Chile1 111.030 July53.52.1×
Puerto VarasLos Lagos Region, Chile1 110.030 July53.22.1×
RancaguaO'Higgins Region, Chile1 95.831 July44.72.1×
ChiguayanteBiobio, Chile1 58.530 July27.62.1×
CuricóMaule Region, Chile1 94.730 July46.42.0×

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 7 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, 30 to 31 July 2024: 17 cities with PM2.5 at twice their usual or more, 30 to 31 July 2024, smogrank.com/episodes/2024-07-30-southern-chile (accessed 4 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.