SmogRank / World / South America / Chile / Maule Region

Most polluted cities in Maule Region, Chile

4 measured cities, this year; 4 above the WHO annual guideline. Worst: Linares at 40.7 µg/m³, #173 in the world.

Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.

← Linares 40.7 µg/m³ 40 µg/m³5 WHO annual guideline

Every measured city in Maule Region, 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.

1Linares 1148.1×
2Curicó 1097.8×
3Talca 936.3×
4Cauquenes 906.0×

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

Maule Region 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.

City	7-day estimate	Band
Constitución	≈ 8 µg/m³	Good
Molina	≈ 16 µg/m³	Moderate
San Javier	≈ 12 µg/m³	Moderate
San Clemente	≈ 12 µg/m³	Moderate
Longaví	≈ 9 µg/m³	Good
Parral	≈ 6 µg/m³	Good
Colbún	≈ 12 µg/m³	Moderate
Sagrada Familia	≈ 19 µg/m³	Moderate

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SmogRank, most polluted cities in Maule Region, Chile, PM2.5, this year to 2 Oct 2026, 07:00 UTC, smogrank.com/cl/region/maule-region?w=year.

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