SmogRank / World / South America / Chile / Ñuble

Most polluted cities in Ñuble, Chile

2 measured cities, this year; 2 above the WHO annual guideline. Worst: Chillán at 35.8 µg/m³, #220 in the world.

Maule Region: 4 measured citiesÑuble: 2 measured citiesBiobio: 12 measured cities#2 San Carlos: 35.6 µg/m³#1 Chillán: 35.8 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Chillán 517.2×
  2. 2San Carlos 517.1×
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. 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

Ñuble 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
Chillán Viejo≈ 6 µg/m³Excellent
Coihueco≈ 6 µg/m³Excellent
Quillón≈ 5 µg/m³Excellent
Coelemu≈ 5 µg/m³Excellent

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SmogRank, most polluted cities in Ñuble, Chile, PM2.5, this year to 2 Oct 2026, 06:00 UTC, smogrank.com/cl/region/nuble?w=year.

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