SmogRank / World / Japan / Hiroshima / July 2025

Most polluted cities in Hiroshima, Japan, July 2025

12 cities in Hiroshima, Japan ranked by their average PM2.5 over the 31 days. Worst: Onomichi at 17.7 µg/m³, #254 of 2,832 cities in the world. Cleanest: Miyoshi at 14.3. 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.

← Kure 13% 10%0
Every city in Hiroshima, Japan ranked for July 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. 1Kure
    13%
  2. 2Onomichi
    10%
  3. 3Higashihiroshima
    10%
  4. 4Shin’ichi
    10%
  5. 5Gion
    10%
  6. 5Fukuyama
    10%
  7. 7Hiroshima
    10%
  8. 8Yae
    10%
  9. 9Takehara
    10%
  10. 9Mihara
    10%
  11. 11Ōtake
    6%
  12. 12Miyoshi
    3%
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 · Hiroshima now

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SmogRank, most polluted cities in Hiroshima, Japan, PM2.5, July 2025, smogrank.com/jp/region/hiroshima/history/2025-07 (accessed 7 Oct 2026).

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