SmogRank / World / Chile / Biobio / July 2024

Most unhealthy days in Biobio, Chile, July 2024

12 cities in Biobio, Chile ranked by their share of unhealthy days over the 31 days. The most unhealthy days: Coronel, Chile, 30 of 31 measured days. A city needs measurements on 70% of the days to be ranked.

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.

← Coronel 97% 90%0
Every city in Biobio, Chile ranked for July 2024, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Coronel
    30 of 31
  2. 2Hualqui
    29 of 30
  3. 3Hualpén
    25 of 27
  4. 4Chiguayante
    27 of 31
  5. 5Nacimiento
    26 of 30
  6. 6Curanilahue
    22 of 28
  7. 7Concepción
    21 of 27
  8. 8Talcahuano
    23 of 31
  9. 9Tomé
    16 of 25
  10. 10San Pedro de la Paz
    16 of 26
  11. 11Los Ángeles
    17 of 31
  12. 12Lota
    9 of 27
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, July 2024 · All cities in Chile, July 2024 · Biobio now

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SmogRank, most polluted cities in Biobio, Chile, by unhealthy days, PM2.5, July 2024, smogrank.com/cl/region/biobio/history/2024-07?by=days (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.