SmogRank / World / South America / Chile / Biobio
Most polluted cities in Biobio, Chile
0 measured cities, last 24 hours.
No city has enough measurements for this window yet.
India's National Air Quality Index (CPCB), PM2.5 sub-index. 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
Biobio 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 |
|---|---|
| Villa Mercedes | ≈ 5 µg/m³ |
| Penco | ≈ 5 µg/m³ |
| Cañete | ≈ 4 µg/m³ |
| Cabrero | ≈ 5 µg/m³ |
| Mulchén | ≈ 4 µg/m³ |
| Arauco | ≈ 5 µg/m³ |
| Lebu | ≈ 5 µg/m³ |
| Los Álamos | ≈ 5 µg/m³ |
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SmogRank, most polluted cities in Biobio, Chile, PM2.5, last 24 hours to 2 Oct 2026, 04:00 UTC, smogrank.com/cl/region/biobio.
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Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the India AQI PM2.5 sub-index.