SmogRank / World / Japan / Saitama / October 2026

Most polluted cities in Saitama, Japan, October 2026

27 cities in Saitama, Japan ranked by their average PM2.5 so far (5 of 31 days). Worst: Kukichūō at 8.5 µg/m³, #683 of 2,246 cities in the world. Cleanest: Ogawamachi at 4.0. 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.

← Kukichūō 0% 0.75%0
Every city in Saitama, Japan ranked for October 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. 1Kukichūō
    0%
  2. 2Menuma
    0%
  3. 3Gyōda
    0%
  4. 4Asaka
    0%
  5. 5Kawaguchi
    0%
  6. 5Ageo
    0%
  7. 7Niiza
    0%
  8. 7Higashi-Matsuyama
    0%
  9. 9Kazo
    0%
  10. 10Sakado
    0%
  11. 10Misato, Saitama
    0%
  12. 12Hanyū
    0%
  13. 13Sōka
    0%
  14. 13Sayama
    0%
  15. 13Saitama
    0%
  16. 16Kōnosu
    0%
  17. 17Kawagoe
    0%
  18. 17Honjō
    0%
  19. 19Tokorozawa
    0%
  20. 19Iruma
    0%
  21. 21Yorii
    0%
  22. 21Kumagaya
    0%
  23. 23Hannō
    0%
  24. 24Morohongō
    0%
  25. 25Kasukabe
    0%
  26. 26Koshigaya
    0%
  27. 27Ogawamachi
    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, October 2026 · All cities in Japan, October 2026 · Saitama now

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SmogRank, most polluted cities in Saitama, Japan, PM2.5, October 2026 (so far), smogrank.com/jp/region/saitama/history/2026-10 (accessed 6 Oct 2026).

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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.