SmogRank / Cleaner or dirtier / Chile

Chile: cleaner or dirtier, 2024

In Chile, 40 cities have enough days in both years to compare 2024 with the same days of 2023: 30 got dirtier and 10 cleaner.

Every city's change from 2023 to 2024, one column each, biggest rise on the left, coloured by its 2024 level. Above the line: dirtier. Below: cleaner.

The 30 cities that got dirtier, biggest rise first

#City20232024Change
1ChiguayanteBiobio, Chile7688+6.9 µg/m³+31%
2ValdiviaLos Ríos Region, Chile8799+6.6 µg/m³+23%
3CoyhaiqueAysén, Chile141152+5.1 µg/m³+10%
4NacimientoBiobio, Chile123136+5.1 µg/m³+11%
5CuranilahueBiobio, Chile96107+4.9 µg/m³+15%
6La UniónLos Ríos Region, Chile96107+4.8 µg/m³+15%
7HualquiBiobio, Chile9098+4.5 µg/m³+15%
8OsornoLos Lagos Region, Chile127137+3.9 µg/m³+8%
9CoronelBiobio, Chile9198+3.8 µg/m³+13%
10RengoO'Higgins Region, Chile9299+3.6 µg/m³+12%
11TalcahuanoBiobio, Chile8794+3.5 µg/m³+12%
12CuricóMaule Region, Chile95102+3.3 µg/m³+10%
13TemucoAraucania, Chile97104+3.0 µg/m³+9%
14ConcepciónBiobio, Chile7681+2.9 µg/m³+13%
15Puerto AysénAysén, Chile9196+2.8 µg/m³+9%
16TalcaMaule Region, Chile8387+2.4 µg/m³+9%
17CauquenesMaule Region, Chile8488+2.4 µg/m³+9%
18QuillotaValparaiso, Chile8488+2.2 µg/m³+8%
19San Pedro de la PazBiobio, Chile7478+2.0 µg/m³+9%
20Los ÁngelesBiobio, Chile8992+1.7 µg/m³+6%
21Puerto MonttLos Lagos Region, Chile97101+1.6 µg/m³+5%
22ChillánÑuble, Chile9699+1.6 µg/m³+5%
23QuinteroValparaiso, Chile7780+1.6 µg/m³+7%
24TocopillaAntofagasta, Chile7477+1.6 µg/m³+7%
25ToméBiobio, Chile8284+1.0 µg/m³+4%
26PuchuncavíValparaiso, Chile8081+0.8 µg/m³+3%
27Puerto VarasLos Lagos Region, Chile124126+0.7 µg/m³+2%
28Puente AltoSantiago Metropolitan, Chile9293+0.7 µg/m³+2%
29CalamaAntofagasta, Chile6667+0.5 µg/m³+3%
30RancaguaO'Higgins Region, Chile9999+0.4 µg/m³+1%

The 10 cities that got cleaner, biggest fall first

#City20232024Change
1CoquimboCoquimbo Region, Chile7671−2.7 µg/m³−12%
2HuascoAtacama, Chile7267−2.4 µg/m³−12%
3CopiapóAtacama, Chile7371−1.3 µg/m³−6%
4Viña del MarValparaiso, Chile7774−1.1 µg/m³−5%
5SantiagoSantiago Metropolitan, Chile103101−0.9 µg/m³−2%
6AricaArica y Parinacota Region, Chile7372−0.7 µg/m³−3%
7TalaganteSantiago Metropolitan, Chile9696−0.2 µg/m³−1%
8La SerenaCoquimbo Region, Chile7271−0.2 µg/m³−1%
9AntofagastaChile7575−0.2 µg/m³−1%
10ConcónValparaiso, Chile7575−0.2 µg/m³−1%

Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.

Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.