SmogRank / World / Japan / Chiba / May 2026

Most polluted cities in Chiba, Japan, May 2026

31 cities in Chiba, Japan ranked by their average PM2.5 over the 31 days. Worst: Sukayama at 9.4 µg/m³, #893 of 2,852 cities in the world. Cleanest: Sodegaura at 6.5. 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 May 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. 2Chiba
    0%
  3. 3Kimitsu
    0%
  4. 3Baraki
    0%
  5. 5Kashiwa
    0%
  6. 6Sakura
    0%
  7. 7Inzai
    0%
  8. 7Kamagaya
    0%
  9. 9Noda
    0%
  10. 10Urayasu
    0%
  11. 10Ichihara
    0%
  12. 10Yachiyo
    0%
  13. 10Narashino
    0%
  14. 14Yotsukaidō
    0%
  15. 14Yachimata
    0%
  16. 16Kisarazu
    0%
  17. 16Sōsa
    0%
  18. 18Matsudo
    0%
  19. 19Narita
    0%
  20. 19Ajiki
    0%
  21. 19Motona
    0%
  22. 22Kōzaki
    0%
  23. 22Ichinomiya
    0%
  24. 24Tateyama
    0%
  25. 25Ōami
    0%
  26. 26Yokoshiba
    0%
  27. 26Mobara
    0%
  28. 28Omigawa
    0%
  29. 28Katsuura
    0%
  30. 30Tōgane
    0%
  31. 31Sodegaura
    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

All cities in the world, May 2026 · All cities in Japan, May 2026 · Chiba now

Use this board

SmogRank, most polluted cities in Chiba, Japan, PM2.5, May 2026, smogrank.com/jp/region/chiba/history/2026-05 (accessed 6 Oct 2026).

Download top 10 (PNG)

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.