SmogRank / World / South America / Chile / Los Lagos Region
Most polluted cities in Los Lagos Region, Chile
3 measured cities, last 30 days; 3 above the WHO 24-hour guideline. Worst: Puerto Varas at 41.4 µg/m³, #54 in the world.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
Cities coloured by their PM2.5 over the last 24 hours. Fires, smoke and ash: Oct 5, the newest UTC day mapped.
- 1Puerto Varas 57%
- 2Osorno 40%
- 3Puerto Montt 31%
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
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 |
|---|---|
| Castro | ≈ 11 µg/m³ |
| Ancud | ≈ 17 µg/m³ |
| Calbuco | ≈ 11 µg/m³ |
| Quellón | ≈ 9 µg/m³ |
| Purranque | ≈ 11 µg/m³ |
| Llanquihue | ≈ 10 µg/m³ |
| Maullín | ≈ 15 µg/m³ |
| Frutillar | ≈ 10 µg/m³ |
Bad-air episodes in Los Lagos Region
- Southern Chile, August 202622 to 24 August 2026, 3 days15 cities169 µg/m³peak, Osorno
- South-western Chile, August 202613 August 2026, 1 day10 cities162 µg/m³peak, Osorno
- Southern Chile, July 20262 to 8 July 2026, 7 days19 cities347 µg/m³peak, Osorno
- Chile, May 202625 to 27 May 2026, 3 days14 cities165 µg/m³peak, Linares
- Southern Chile, May 202618 to 22 May 2026, 5 days19 cities192 µg/m³peak, Hualpén
- South-western Chile, May 20262 to 3 May 2026, 2 days9 cities132 µg/m³peak, Puerto Varas
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
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SmogRank, most polluted cities in Los Lagos Region, Chile, PM2.5, last 30 days to 6 Oct 2026, 23:00 UTC, smogrank.com/cl/region/los-lagos-region?w=30d.
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Updated 2026-10-06 23:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.