SmogRank / World / Japan / Chiba / August 2023

Most unhealthy days in Chiba, Japan, August 2023

27 cities in Chiba, Japan ranked by their share of unhealthy days over the 31 days. The most unhealthy days: Sukayama, Japan, 0 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.

← Sukayama 0% 0.75%0
Every city in Chiba, Japan ranked for August 2023, 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. 1Sukayama
    0 of 31
  2. 2Urayasu
    0 of 31
  3. 2Noda
    0 of 31
  4. 4Chiba
    0 of 31
  5. 5Kashiwa
    0 of 31
  6. 5Yokoshiba
    0 of 31
  7. 7Matsudo
    0 of 31
  8. 7Narashino
    0 of 31
  9. 9Inzai
    0 of 28
  10. 9Baraki
    0 of 31
  11. 11Ichinomiya
    0 of 28
  12. 12Narita
    0 of 31
  13. 12Ichihara
    0 of 31
  14. 14Mobara
    0 of 31
  15. 14Sōsa
    0 of 28
  16. 16Yotsukaidō
    0 of 28
  17. 16Ajiki
    0 of 28
  18. 18Kisarazu
    0 of 28
  19. 19Kimitsu
    0 of 31
  20. 19Sakura
    0 of 28
  21. 19Omigawa
    0 of 28
  22. 22Choshi
    0 of 28
  23. 23Yachimata
    0 of 31
  24. 24Kamagaya
    0 of 31
  25. 25Tateyama
    0 of 31
  26. 26Tōgane
    0 of 30
  27. 27Sodegaura
    0 of 31
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

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SmogRank, most polluted cities in Chiba, Japan, by unhealthy days, PM2.5, August 2023, smogrank.com/jp/region/chiba/history/2023-08?by=days (accessed 7 Oct 2026).

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