SmogRank / World / South America / Chile / Ñuble

Most polluted cities in Ñuble, Chile

2 measured cities, last 30 days; 2 above the WHO 24-hour guideline. Worst: Chillán at 28.5 µg/m³, #242 in the world.

Maule Region: 4 measured citiesÑuble: 2 measured citiesBiobio: 12 measured cities#2 San Carlos: 26.8 µg/m³#1 Chillán: 28.5 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Chillán 3
  2. 2San Carlos 3
Low risk1–3
Moderate risk4–6
High risk7–10
Very high risk10+

Canada's AQHI+ for PM2.5 (1 point per 10 µg/m³), which is defined on hourly values. 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/m³Low risk
Coihueco≈ 6 µg/m³Low risk
Quillón≈ 5 µg/m³Low risk
Coelemu≈ 5 µg/m³Low risk

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SmogRank, most polluted cities in Ñuble, Chile, PM2.5, last 30 days to 2 Oct 2026, 05:00 UTC, smogrank.com/cl/region/nuble?w=30d.

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Updated 2026-10-02 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the Canada AQHI+ PM2.5 sub-index.