SmogRank / World / South America / Chile / Santiago Metropolitan

Most polluted cities in Santiago Metropolitan, Chile

3 measured cities, last 30 days; 3 above the WHO 24-hour guideline. Worst: Puente Alto at 27.0 µg/m³, #252 in the world.

Santiago Metropolitan: 3 measured citiesValparaiso: 4 measured citiesO'Higgins Region: 2 measured cities#3 Talagante: 21.1 µg/m³#2 Santiago: 26.8 µg/m³#1 Puente Alto: 27.0 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Puente Alto 27.0 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. 1Puente Alto 27.0
  2. 2Santiago 26.8
  3. 3Talagante 21.1
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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/m³Moderate
San Bernardo≈ 48 µg/m³Moderate
Peñalolén≈ 32 µg/m³Moderate
Quilicura≈ 29 µg/m³Moderate
La Pintana≈ 48 µg/m³Moderate
Renca≈ 48 µg/m³Moderate
Colina≈ 29 µg/m³Moderate
Lo Prado≈ 48 µg/m³Moderate
Lampa≈ 29 µg/m³Moderate
Peñaflor≈ 48 µg/m³Moderate
Paine≈ 37 µg/m³Moderate
Buin≈ 48 µg/m³Moderate
Padre Hurtado≈ 48 µg/m³Moderate
Melipilla≈ 19 µg/m³Moderate
El Monte≈ 48 µg/m³Moderate
Curacaví≈ 17 µg/m³Moderate

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SmogRank, most polluted cities in Santiago Metropolitan, Chile, PM2.5, last 30 days to 2 Oct 2026, 07:00 UTC, smogrank.com/cl/region/santiago-metropolitan?w=30d.

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Updated 2026-10-02 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.