SmogRank / World / Japan / Chiba / 2025

Most polluted cities in Chiba, Japan, 2025

31 cities in Chiba, Japan ranked by their average PM2.5 over the 365 days; 31 above the WHO annual guideline (5.0 µg/m³). Worst: Noda at 10.3 µg/m³, #865 of 2,624 cities in the world. Cleanest: Katsuura at 7.1. 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.

← Noda 1% 1%0
Every city in Chiba, Japan ranked for 2025, 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. 1Noda
    1%
  2. 2Tateyama
    1%
  3. 3Yachimata
    1%
  4. 4Motona
    1%
  5. 5Katsuura
    1%
  6. 6Yachiyo
    1%
  7. 7Kashiwa
    1%
  8. 8Chiba
    1%
  9. 9Ichihara
    1%
  10. 10Nagadomi
    1%
  11. 11Kōzaki
    1%
  12. 12Baraki
    1%
  13. 13Yokoshiba
    1%
  14. 14Tōgane
    1%
  15. 15Sōsa
    1%
  16. 16Kamagaya
    1%
  17. 17Kimitsu
    1%
  18. 18Narita
    1%
  19. 19Mobara
    1%
  20. 20Narashino
    1%
  21. 21Sakura
    1%
  22. 22Urayasu
    1%
  23. 23Ajiki
    0%
  24. 24Yotsukaidō
    0%
  25. 25Inzai
    0%
  26. 26Sukayama
    0%
  27. 27Kisarazu
    0%
  28. 28Sodegaura
    0%
  29. 29Matsudo
    0%
  30. 30Omigawa
    0%
  31. 31Ichinomiya
    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, 2025, smogrank.com/jp/region/chiba/history/2025 (accessed 6 Oct 2026).

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