SmogRank / Episodes / Chile
South-western Chile, 14 to 19 May 2024
For 6 days, from 14 to 19 May 2024, 19 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: 275.0 µg/m³ on 16 May, about 4.9× its usual 55.9.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 19 in 1 country
Days 6 14 to 19 May 2024
Worst day 18 May 18 cities counted
Furthest above usual 5.1× Puerto Varas
Day by day
Play 18 May 18 cities at twice their usual or more
Concepción Tomé Curicó San Pedro de la Paz Talca Chiguayante Cauquenes Valdivia Villarrica Curanilahue Nacimiento Coronel Temuco Talcahuano Hualpén Chillán Los Ángeles La Unión San Carlos Puerto Montt Osorno Puerto Varas 11 May 12 13 14 15 16 17 18 19 20 21 22 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
Temuco Temuco, 11 May: 51.1 µg/m³ Temuco, 12 May: 64.6 µg/m³ Temuco, 13 May: 80.8 µg/m³ Temuco, 14 May: 119.0 µg/m³, 2.9× its usual 41.2 Temuco, 15 May: 63.6 µg/m³ Temuco, 16 May: 58.5 µg/m³ Temuco, 17 May: 126.0 µg/m³, 2.9× its usual 43.7 Temuco, 18 May: 105.0 µg/m³, 2.3× its usual 45.7 Temuco, 19 May: 91.9 µg/m³, 2.1× its usual 44.8 Temuco, 20 May: 50.0 µg/m³ Temuco, 21 May: 31.5 µg/m³ Temuco, 22 May: 73.7 µg/m³ San Carlos San Carlos, 11 May: 102.0 µg/m³ San Carlos, 12 May: 73.1 µg/m³ San Carlos, 13 May: 58.2 µg/m³ San Carlos, 14 May: 113.0 µg/m³, 2.6× its usual 44.3 San Carlos, 15 May: 56.2 µg/m³ San Carlos, 16 May: 50.6 µg/m³ San Carlos, 17 May: 90.4 µg/m³, 2.0× its usual 44.3 San Carlos, 18 May: 179.0 µg/m³, 4.0× its usual 44.3 San Carlos, 19 May: 138.0 µg/m³, 3.1× its usual 43.9 San Carlos, 20 May: 65.0 µg/m³ San Carlos, 21 May: 54.9 µg/m³ San Carlos, 22 May: 44.8 µg/m³ Coronel Coronel, 11 May: 50.1 µg/m³ Coronel, 12 May: 77.1 µg/m³ Coronel, 13 May: 77.6 µg/m³ Coronel, 14 May: 105.7 µg/m³, 2.5× its usual 42.3 Coronel, 15 May: 92.4 µg/m³, 2.2× its usual 42.5 Coronel, 16 May: 41.3 µg/m³ Coronel, 17 May: 111.9 µg/m³, 2.6× its usual 43.5 Coronel, 18 May: 124.7 µg/m³, 2.9× its usual 43.7 Coronel, 19 May: 78.5 µg/m³ Coronel, 20 May: 37.5 µg/m³ Coronel, 21 May: 54.8 µg/m³ Coronel, 22 May: 74.3 µg/m³ La Unión La Unión, 11 May: 61.3 µg/m³ La Unión, 12 May: 46.8 µg/m³ La Unión, 13 May: 59.8 µg/m³ La Unión, 14 May: 103.0 µg/m³, 2.6× its usual 39.5 La Unión, 15 May: 72.7 µg/m³ La Unión, 16 May: 116.0 µg/m³, 2.9× its usual 39.7 La Unión, 17 May: 140.0 µg/m³, 3.5× its usual 39.9 La Unión, 18 May: 101.0 µg/m³, 2.5× its usual 40.2 La Unión, 19 May: 49.2 µg/m³ La Unión, 20 May: 39.3 µg/m³ La Unión, 21 May: 41.8 µg/m³ La Unión, 22 May: 58.3 µg/m³ Chillán Chillán, 11 May: 118.3 µg/m³ Chillán, 12 May: 104.2 µg/m³ Chillán, 13 May: 44.0 µg/m³ Chillán, 14 May: 102.6 µg/m³, 2.5× its usual 40.4 Chillán, 15 May: 87.8 µg/m³, 2.2× its usual 40.5 Chillán, 16 May: 50.7 µg/m³ Chillán, 17 May: 80.2 µg/m³ Chillán, 18 May: 129.6 µg/m³, 3.1× its usual 42.1 Chillán, 19 May: 134.4 µg/m³, 3.3× its usual 40.7 Chillán, 20 May: 62.3 µg/m³ Chillán, 21 May: 46.1 µg/m³ Chillán, 22 May: 45.4 µg/m³ Curanilahue Curanilahue, 11 May: 72.2 µg/m³ Curanilahue, 12 May: 76.8 µg/m³ Curanilahue, 13 May: 42.0 µg/m³ Curanilahue, 14 May: 101.0 µg/m³, 2.1× its usual 47.2 Curanilahue, 15 May: 121.0 µg/m³, 2.6× its usual 46.5 Curanilahue, 16 May: 62.0 µg/m³ Curanilahue, 17 May: 74.9 µg/m³ Curanilahue, 18 May: 121.0 µg/m³, 2.5× its usual 48.1 Curanilahue, 19 May: 110.0 µg/m³, 2.3× its usual 48.3 Curanilahue, 20 May: 55.2 µg/m³ Curanilahue, 21 May: 55.5 µg/m³ Curanilahue, 22 May: 71.0 µg/m³ Puerto Montt Puerto Montt, 11 May: 44.5 µg/m³ Puerto Montt, 12 May: 68.5 µg/m³ Puerto Montt, 13 May: 119.6 µg/m³ Puerto Montt, 14 May: 87.0 µg/m³, 2.7× its usual 31.9 Puerto Montt, 15 May: 62.4 µg/m³ Puerto Montt, 16 May: 95.8 µg/m³, 3.0× its usual 31.9 Puerto Montt, 17 May: 114.5 µg/m³, 3.6× its usual 31.9 Puerto Montt, 18 May: 137.5 µg/m³, 4.3× its usual 31.9 Puerto Montt, 19 May: 44.3 µg/m³ Puerto Montt, 20 May: 27.1 µg/m³ Puerto Montt, 21 May: 31.4 µg/m³ Puerto Montt, 22 May: 53.7 µg/m³ Hualpén Hualpén, 11 May: 110.0 µg/m³ Hualpén, 12 May: 102.0 µg/m³ Hualpén, 13 May: 62.6 µg/m³ Hualpén, 14 May: 93.3 µg/m³ Hualpén, 15 May: 129.0 µg/m³, 2.5× its usual 50.8 Hualpén, 16 May: 50.2 µg/m³ Hualpén, 17 May: 104.0 µg/m³ Hualpén, 18 May: 135.0 µg/m³, 2.5× its usual 53.4 Hualpén, 19 May: 167.0 µg/m³, 3.1× its usual 53.4 Hualpén, 20 May: 63.5 µg/m³ Hualpén, 21 May: 74.1 µg/m³ Hualpén, 22 May: 84.7 µg/m³ Osorno Osorno, 11 May: 65.8 µg/m³ Osorno, 12 May: 77.4 µg/m³ Osorno, 13 May: 94.3 µg/m³ Osorno, 14 May: 85.3 µg/m³ Osorno, 15 May: 128.0 µg/m³, 2.3× its usual 56.3 Osorno, 16 May: 275.0 µg/m³, 4.9× its usual 55.9 Osorno, 17 May: 192.5 µg/m³, 3.4× its usual 55.9 Osorno, 18 May: 165.0 µg/m³, 2.8× its usual 58.9 Osorno, 19 May: 75.3 µg/m³ Osorno, 20 May: 37.8 µg/m³ Osorno, 21 May: 45.8 µg/m³ Osorno, 22 May: 100.1 µg/m³ Los Ángeles Los Ángeles, 11 May: 91.9 µg/m³ Los Ángeles, 12 May: 64.1 µg/m³ Los Ángeles, 13 May: 27.1 µg/m³ Los Ángeles, 14 May: 44.2 µg/m³ Los Ángeles, 15 May: 119.9 µg/m³, 3.5× its usual 34.6 Los Ángeles, 16 May: 65.8 µg/m³ Los Ángeles, 17 May: 68.0 µg/m³ Los Ángeles, 18 May: 95.9 µg/m³, 2.6× its usual 36.2 Los Ángeles, 19 May: 93.8 µg/m³, 2.6× its usual 36.6 Los Ángeles, 20 May: 56.5 µg/m³ Los Ángeles, 21 May: 31.6 µg/m³ Los Ángeles, 22 May: 43.6 µg/m³ Talcahuano Talcahuano, 11 May: 95.3 µg/m³ Talcahuano, 12 May: 88.7 µg/m³ Talcahuano, 13 May: 49.7 µg/m³ Talcahuano, 14 May: 51.7 µg/m³ Talcahuano, 15 May: 104.2 µg/m³, 3.0× its usual 34.6 Talcahuano, 16 May: 40.4 µg/m³ Talcahuano, 17 May: 79.6 µg/m³, 2.2× its usual 35.7 Talcahuano, 18 May: 108.0 µg/m³, 3.0× its usual 35.7 Talcahuano, 19 May: 108.3 µg/m³, 3.0× its usual 35.6 Talcahuano, 20 May: 30.6 µg/m³ Talcahuano, 21 May: 30.3 µg/m³ Talcahuano, 22 May: 44.8 µg/m³ Villarrica Villarrica, 11 May: 108.0 µg/m³ Villarrica, 12 May: 53.5 µg/m³ Villarrica, 13 May: 41.3 µg/m³ Villarrica, 14 May: 73.4 µg/m³ Villarrica, 15 May: 92.9 µg/m³, 2.2× its usual 42.2 Villarrica, 16 May: 76.6 µg/m³ Villarrica, 17 May: 107.0 µg/m³, 2.5× its usual 43.2 Villarrica, 18 May: 115.0 µg/m³, 2.6× its usual 44.4 Villarrica, 19 May: 96.3 µg/m³, 2.1× its usual 45.5 Villarrica, 20 May: 31.8 µg/m³ Villarrica, 21 May: 37.4 µg/m³ Villarrica, 22 May: 82.5 µg/m³ Chiguayante Chiguayante, 11 May: 45.7 µg/m³ Chiguayante, 12 May: 45.2 µg/m³ Chiguayante, 13 May: 44.2 µg/m³ Chiguayante, 14 May: 45.4 µg/m³ Chiguayante, 15 May: 70.0 µg/m³, 2.3× its usual 29.9 Chiguayante, 16 May: 75.3 µg/m³, 2.5× its usual 29.9 Chiguayante, 17 May: 54.2 µg/m³ Chiguayante, 18 May: 61.2 µg/m³, 2.0× its usual 29.9 Chiguayante, 19 May: 59.4 µg/m³ Chiguayante, 20 May: 27.9 µg/m³ Chiguayante, 21 May: 46.2 µg/m³ Chiguayante, 22 May: 42.1 µg/m³ Puerto Varas Puerto Varas, 11 May: 56.9 µg/m³ Puerto Varas, 12 May: 62.0 µg/m³ Puerto Varas, 13 May: 87.3 µg/m³ Puerto Varas, 14 May: 74.4 µg/m³ Puerto Varas, 15 May: 52.2 µg/m³ Puerto Varas, 16 May: 182.0 µg/m³, 4.2× its usual 43.7 Puerto Varas, 17 May: 222.0 µg/m³, 5.1× its usual 43.3 Puerto Varas, 18 May: 150.0 µg/m³, 3.4× its usual 44.0 Puerto Varas, 19 May: 89.3 µg/m³, 2.0× its usual 44.0 Puerto Varas, 20 May: 27.3 µg/m³ Puerto Varas, 21 May: 37.0 µg/m³ Puerto Varas, 22 May: 94.2 µg/m³ Nacimiento Nacimiento, 11 May: 100.3 µg/m³ Nacimiento, 12 May: 139.0 µg/m³ Nacimiento, 13 May: 82.2 µg/m³ Nacimiento, 14 May: 126.4 µg/m³ Nacimiento, 15 May: 120.0 µg/m³ Nacimiento, 16 May: 140.5 µg/m³, 2.1× its usual 65.4 Nacimiento, 17 May: 175.8 µg/m³, 2.6× its usual 66.9 Nacimiento, 18 May: 150.8 µg/m³, 2.3× its usual 67.0 Nacimiento, 19 May: 142.0 µg/m³, 2.1× its usual 67.3 Nacimiento, 20 May: 84.7 µg/m³ Nacimiento, 21 May: 59.2 µg/m³ Nacimiento, 22 May: 128.5 µg/m³ Valdivia Valdivia, 11 May: 43.0 µg/m³ Valdivia, 12 May: 51.6 µg/m³ Valdivia, 13 May: 66.4 µg/m³ Valdivia, 14 May: 71.2 µg/m³ Valdivia, 15 May: 44.8 µg/m³ Valdivia, 16 May: 97.4 µg/m³, 2.6× its usual 37.3 Valdivia, 17 May: 76.0 µg/m³, 2.0× its usual 37.5 Valdivia, 18 May: 33.7 µg/m³ Valdivia, 19 May: 37.5 µg/m³ Valdivia, 20 May: 29.1 µg/m³ Valdivia, 21 May: 21.9 µg/m³ Valdivia, 22 May: 45.3 µg/m³ Talca Talca, 11 May: 52.4 µg/m³ Talca, 12 May: 58.8 µg/m³ Talca, 13 May: 40.5 µg/m³ Talca, 14 May: 61.2 µg/m³ Talca, 15 May: 68.3 µg/m³ Talca, 16 May: 45.4 µg/m³ Talca, 17 May: 86.0 µg/m³, 2.1× its usual 41.3 Talca, 18 May: 91.9 µg/m³, 2.2× its usual 41.3 Talca, 19 May: 93.9 µg/m³, 2.3× its usual 41.3 Talca, 20 May: 67.5 µg/m³ Talca, 21 May: 32.1 µg/m³ Talca, 22 May: 40.6 µg/m³ Cauquenes Cauquenes, 11 May: 39.0 µg/m³ Cauquenes, 12 May: 37.7 µg/m³ Cauquenes, 13 May: 38.7 µg/m³ Cauquenes, 14 May: 49.0 µg/m³ Cauquenes, 15 May: 60.2 µg/m³ Cauquenes, 16 May: 55.8 µg/m³ Cauquenes, 17 May: 63.5 µg/m³ Cauquenes, 18 May: 82.7 µg/m³, 2.4× its usual 35.0 Cauquenes, 19 May: 90.3 µg/m³, 2.5× its usual 35.5 Cauquenes, 20 May: 57.9 µg/m³ Cauquenes, 21 May: 47.0 µg/m³ Cauquenes, 22 May: 44.4 µg/m³ San Pedro de la Paz San Pedro de la Paz, 11 May: 38.0 µg/m³ San Pedro de la Paz, 12 May: 38.5 µg/m³ San Pedro de la Paz, 13 May: 30.3 µg/m³ San Pedro de la Paz, 14 May: 37.6 µg/m³ San Pedro de la Paz, 15 May: 46.3 µg/m³ San Pedro de la Paz, 16 May: 27.1 µg/m³ San Pedro de la Paz, 17 May: 41.3 µg/m³ San Pedro de la Paz, 18 May: 56.0 µg/m³, 2.1× its usual 27.3 San Pedro de la Paz, 19 May: 55.5 µg/m³, 2.0× its usual 27.2 San Pedro de la Paz, 20 May: 22.8 µg/m³ San Pedro de la Paz, 21 May: 25.5 µg/m³ San Pedro de la Paz, 22 May: 29.6 µg/m³ 11 May 13 15 17 19 21 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. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Puerto Varas Los Lagos Region, Chile 4 17 May 43.3 5.1× Osorno Los Lagos Region, Chile 4 16 May 55.9 4.9× Puerto Montt Los Lagos Region, Chile 4 18 May 31.9 4.3× San Carlos Ñuble, Chile 4 18 May 44.3 4.0× La Unión Los Ríos Region, Chile 4 17 May 39.9 3.5× Los Ángeles Biobio, Chile 3 15 May 34.6 3.5× Chillán Ñuble, Chile 4 19 May 40.7 3.3× Hualpén Biobio, Chile 3 19 May 53.4 3.1× Talcahuano Biobio, Chile 4 19 May 35.6 3.0× Temuco Araucania, Chile 4 17 May 43.7 2.9× Coronel Biobio, Chile 4 18 May 43.7 2.9× Nacimiento Biobio, Chile 4 17 May 66.9 2.6× Curanilahue Biobio, Chile 4 15 May 46.5 2.6× Villarrica Araucania, Chile 4 18 May 44.4 2.6× Valdivia Los Ríos Region, Chile 2 16 May 37.3 2.6× Cauquenes Maule Region, Chile 2 19 May 35.5 2.5× Chiguayante Biobio, Chile 3 16 May 29.9 2.5× Talca Maule Region, Chile 3 19 May 41.3 2.3× San Pedro de la Paz Biobio, Chile 2 18 May 27.3 2.1×
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 4 of 30 episodes in Chile since our records began, by cities reached.
Southern Chile, 11 to 14 July 2024 24 Southern Chile, July 2026 19 Southern Chile, 18 to 22 May 2026 19 South-western Chile, 14 to 19 May 2024 19 South-western Chile, 24 to 28 May 2024 18 Southern Chile, 29 June to 4 July 2025 17 Southern Chile, 30 to 31 July 2024 17 South-western Chile, July 2024 15 Southern Chile, August 2026 14 Southern Chile, 25 to 27 May 2026 14 South-western Chile, 17 to 20 June 2023 14 Southern Chile, July 2023 13 Bars: cities reached; colour: the level of the episode's highest daily reading. All 30 .
Use this page SmogRank, South-western Chile, 14 to 19 May 2024: 19 cities with PM2.5 at twice their usual or more, 14 to 19 May 2024, smogrank.com/episodes/2024-05-14-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.
