SmogRank / World / Japan / Aichi / September 2025

Most polluted cities in Aichi, Japan, September 2025

23 cities in Aichi, Japan ranked by their average PM2.5 over the 30 days. Worst: Owariasahi at 9.6 µg/m³, #720 of 3,052 cities in the world. Cleanest: Shinshiro at 5.9. 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.

← Owariasahi 0% 0.75%0
Every city in Aichi, Japan ranked for September 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. 1Owariasahi
    0%
  2. 2Tahara
    0%
  3. 3Kariya
    0%
  4. 4Okazaki
    0%
  5. 5Chiryū
    0%
  6. 6Toyota
    0%
  7. 6Tōkai
    0%
  8. 8Handa
    0%
  9. 9Nagoya
    0%
  10. 9Kaminoma
    0%
  11. 11Nishio
    0%
  12. 11Gamagōri
    0%
  13. 13Toyohashi
    0%
  14. 14Ichinomiya
    0%
  15. 14Nisshin
    0%
  16. 14Ama
    0%
  17. 17Seto
    0%
  18. 18Tokoname
    0%
  19. 18Anjō
    0%
  20. 20Minamichita
    0%
  21. 21Hekinan
    0%
  22. 22Inuyama
    0%
  23. 23Shinshiro
    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, September 2025 · All cities in Japan, September 2025 · Aichi now

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SmogRank, most polluted cities in Aichi, Japan, PM2.5, September 2025, smogrank.com/jp/region/aichi/history/2025-09 (accessed 7 Oct 2026).

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