SmogRank / World / South America / Chile / Santiago Metropolitan

Most polluted cities in Santiago Metropolitan, Chile

3 measured cities, last 7 days; 3 above the WHO 24-hour guideline. Worst: Santiago at 24.9 µg/m³, #123 in the world.

Santiago Metropolitan: 3 measured citiesValparaiso: 4 measured citiesO'Higgins Region: 2 measured cities#3 Talagante: 19.0 µg/m³#2 Puente Alto: 23.4 µg/m³#1 Santiago: 24.9 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Santiago 24.9 µg/m³ 15 µg/m³ WHO 24-hour guideline0
Every measured city in Santiago Metropolitan, Chile, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Santiago 80
  2. 2Puente Alto 78
  3. 3Talagante 69
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

Estimated: cities without a monitor

Santiago Metropolitan cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Maipú≈ 48 µg/m³Unhealthy for sensitive groups
San Bernardo≈ 48 µg/m³Unhealthy for sensitive groups
Peñalolén≈ 32 µg/m³Moderate
Quilicura≈ 29 µg/m³Moderate
La Pintana≈ 48 µg/m³Unhealthy for sensitive groups
Renca≈ 48 µg/m³Unhealthy for sensitive groups
Colina≈ 29 µg/m³Moderate
Lo Prado≈ 48 µg/m³Unhealthy for sensitive groups
Lampa≈ 29 µg/m³Moderate
Peñaflor≈ 48 µg/m³Unhealthy for sensitive groups
Paine≈ 37 µg/m³Unhealthy for sensitive groups
Buin≈ 48 µg/m³Unhealthy for sensitive groups
Padre Hurtado≈ 48 µg/m³Unhealthy for sensitive groups
Melipilla≈ 19 µg/m³Moderate
El Monte≈ 48 µg/m³Unhealthy for sensitive groups
Curacaví≈ 17 µg/m³Moderate

Use this board

SmogRank, most polluted cities in Santiago Metropolitan, Chile, PM2.5, last 7 days to 2 Oct 2026, 06:00 UTC, smogrank.com/cl/region/santiago-metropolitan?w=7d.

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Updated 2026-10-02 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.