SmogRank / World / Japan / Aichi / July 2025

Most polluted cities in Aichi, Japan, July 2025

23 cities in Aichi, Japan ranked by their average PM2.5 over the 31 days. Worst: Owariasahi at 15.4 µg/m³, #358 of 2,832 cities in the world. Cleanest: Inuyama at 9.3. A city needs measurements on 70% of the days to be ranked.

About 132K people in these 9 cities breathed unhealthy air on an average day of July 2025.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

← Nagoya 75.2K 70K0
Every city in Aichi, Japan ranked for July 2025 with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1Nagoya
    75.2K
  2. 2Toyohashi
    24.4K
  3. 3Okazaki
    12.4K
  4. 4Ichinomiya
    12.3K
  5. 5Kariya
    4.96K
  6. 6Gamagōri
    2.58K
  7. 7Toyota
    0
  8. 8Tōkai
    0
  9. 9Nisshin
    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, July 2025 · All cities in Japan, July 2025 · Aichi now

Use this board

SmogRank, most polluted cities in Aichi, Japan, PM2.5, July 2025, smogrank.com/jp/region/aichi/history/2025-07 (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.