SmogRank / World / Japan / Chiba / 2026

Most polluted cities in Chiba, Japan, 2026

31 cities in Chiba, Japan ranked by their average PM2.5 so far (278 of 365 days); 31 above the WHO annual guideline (5.0 µg/m³). Worst: Sukayama at 9.5 µg/m³, #1,142 of 2,745 cities in the world. Cleanest: Katsuura at 6.1. 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 2026, 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%
  2. 2Noda
    0%
  3. 3Sakura
    0%
  4. 4Kashiwa
    0%
  5. 4Kimitsu
    0%
  6. 4Chiba
    0%
  7. 4Kamagaya
    0%
  8. 8Ichihara
    0%
  9. 9Yotsukaidō
    0%
  10. 9Yachiyo
    0%
  11. 9Baraki
    0%
  12. 12Urayasu
    0%
  13. 12Yachimata
    0%
  14. 14Kisarazu
    0%
  15. 14Narashino
    0%
  16. 16Narita
    0%
  17. 16Sōsa
    0%
  18. 16Inzai
    0%
  19. 19Matsudo
    0%
  20. 20Mobara
    0%
  21. 21Tateyama
    0%
  22. 21Ajiki
    0%
  23. 21Motona
    0%
  24. 24Yokoshiba
    0%
  25. 24Kōzaki
    0%
  26. 24Ichinomiya
    0%
  27. 27Ōami
    0%
  28. 27Sodegaura
    0%
  29. 29Omigawa
    0%
  30. 30Tōgane
    0%
  31. 31Katsuura
    0%
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, PM2.5, 2026 (so far), smogrank.com/jp/region/chiba/history/2026 (accessed 6 Oct 2026).

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