SmogRank / World / Japan / Chiba / September 2023

Most unhealthy days in Chiba, Japan, September 2023

28 cities in Chiba, Japan ranked by their share of unhealthy days over the 30 days. The most unhealthy days: Chiba, Japan, 0 of 29 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.

← Chiba 0% 0.75%0
Every city in Chiba, Japan ranked for September 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. 1Chiba
    0 of 29
  2. 2Urayasu
    0 of 30
  3. 3Noda
    0 of 29
  4. 4Matsudo
    0 of 30
  5. 5Sukayama
    0 of 30
  6. 5Ichihara
    0 of 29
  7. 7Narita
    0 of 29
  8. 7Inzai
    0 of 29
  9. 9Kashiwa
    0 of 30
  10. 9Kimitsu
    0 of 29
  11. 11Kamagaya
    0 of 26
  12. 12Kisarazu
    0 of 30
  13. 12Yokoshiba
    0 of 26
  14. 12Narashino
    0 of 29
  15. 15Yotsukaidō
    0 of 29
  16. 15Baraki
    0 of 29
  17. 17Yachimata
    0 of 26
  18. 17Ichinomiya
    0 of 29
  19. 19Ajiki
    0 of 29
  20. 19Sōsa
    0 of 29
  21. 21Sakura
    0 of 29
  22. 21Omigawa
    0 of 29
  23. 21Mobara
    0 of 26
  24. 24Choshi
    0 of 29
  25. 25Tateyama
    0 of 26
  26. 26Tōgane
    0 of 26
  27. 27Sodegaura
    0 of 29
  28. 28Nagadomi
    0 of 25
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, September 2023 · All cities in Japan, September 2023 · Chiba now

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SmogRank, most polluted cities in Chiba, Japan, by unhealthy days, PM2.5, September 2023, smogrank.com/jp/region/chiba/history/2023-09?by=days (accessed 7 Oct 2026).

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