SmogRank / World / Japan / Aichi / March 2025

Most polluted cities in Aichi, Japan, March 2025

23 cities in Aichi, Japan ranked by their average PM2.5 over the 31 days. Worst: Tahara at 14.6 µg/m³, #982 of 2,809 cities in the world. Cleanest: Minamichita at 7.9. A city needs measurements on 70% of the days to be ranked.

About 140K people in these 9 cities breathed unhealthy air on an average day of March 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 March 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. 2Toyota
    13.7K
  3. 3Okazaki
    12.4K
  4. 4Ichinomiya
    12.3K
  5. 5Toyohashi
    12.2K
  6. 6Kariya
    4.96K
  7. 7Tōkai
    3.67K
  8. 8Nisshin
    3.06K
  9. 9Gamagōri
    2.58K
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, March 2025 · All cities in Japan, March 2025 · Aichi now

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SmogRank, most polluted cities in Aichi, Japan, PM2.5, March 2025, smogrank.com/jp/region/aichi/history/2025-03 (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.