SmogRank / World / Japan / Saitama / July 2026

Most polluted cities in Saitama, Japan, July 2026

29 cities in Saitama, Japan ranked by their average PM2.5 over the 31 days. Worst: Gyōda at 11.8 µg/m³, #916 of 2,751 cities in the world. Cleanest: Ogawamachi at 8.9. 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.

← Gyōda 0% 0.75%0
Every city in Saitama, Japan ranked for July 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. 1Gyōda
    0%
  2. 2Honjō
    0%
  3. 3Menuma
    0%
  4. 4Yorii
    0%
  5. 5Asaka
    0%
  6. 6Niiza
    0%
  7. 7Kukichūō
    0%
  8. 7Kōnosu
    0%
  9. 9Sakado
    0%
  10. 9Koshigaya
    0%
  11. 9Kawaguchi
    0%
  12. 9Ageo
    0%
  13. 13Sōka
    0%
  14. 13Igusa
    0%
  15. 15Morohongō
    0%
  16. 15Minano
    0%
  17. 15Kawagoe
    0%
  18. 18Hannō
    0%
  19. 19Higashi-Matsuyama
    0%
  20. 20Tokorozawa
    0%
  21. 21Kazo
    0%
  22. 21Chichibu
    0%
  23. 21Sayama
    0%
  24. 24Hanyū
    0%
  25. 24Misato, Saitama
    0%
  26. 24Saitama
    0%
  27. 27Kumagaya
    0%
  28. 28Kasukabe
    0%
  29. 29Ogawamachi
    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 Saitama, Japan, PM2.5, July 2026, smogrank.com/jp/region/saitama/history/2026-07 (accessed 6 Oct 2026).

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