SmogRank / World / South America / Chile / Los Lagos Region

Most polluted cities in Los Lagos Region, Chile

3 measured cities, this year; 3 above the WHO annual guideline. Worst: Osorno at 49.6 µg/m³, #131 in the world.

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

← Osorno 49.6 µg/m³ 40 µg/m³5 WHO annual guideline

Every measured city in Los Lagos 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.

1Osorno 69.9×
2Puerto Varas 59.5×
3Puerto Montt 36.7×

Low1–3

Moderate4–6

High7–9

Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. 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

Los Lagos 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
Castro	≈ 3 µg/m³	Low
Ancud	≈ 5 µg/m³	Low
Calbuco	≈ 3 µg/m³	Low
Quellón	≈ 3 µg/m³	Low
Purranque	≈ 3 µg/m³	Low
Llanquihue	≈ 3 µg/m³	Low
Maullín	≈ 4 µg/m³	Low
Frutillar	≈ 3 µg/m³	Low

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SmogRank, most polluted cities in Los Lagos Region, Chile, PM2.5, this year to 2 Oct 2026, 06:00 UTC, smogrank.com/cl/region/los-lagos-region?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 UK DAQI PM2.5 sub-index.