SmogRank / World / Chile / Biobio / June 2025

Most people breathing unhealthy air in Biobio, Chile, June 2025

4 cities in Biobio, Chile measured at 2 or more places, ranked by how many people breathed unhealthy air on an average day over the 30 days. The most people breathing unhealthy air: Talcahuano, Chile, about 115K on an average day. A city needs measurements on 70% of the days to be ranked.

About 340K people in these 4 cities breathed unhealthy air on an average day of June 2025.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

← Talcahuano 115K 100K0
Every city in Biobio, Chile ranked for June 2025 with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1Talcahuano
    115K
  2. 2Los Ángeles
    96.2K
  3. 3Coronel
    86.2K
  4. 4Chiguayante
    42.4K
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

All cities in the world, June 2025 · All cities in Chile, June 2025 · Biobio now

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SmogRank, most polluted cities in Biobio, Chile, by people breathing unhealthy air, PM2.5, June 2025, smogrank.com/cl/region/biobio/history/2025-06?by=people (accessed 7 Oct 2026).

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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.