SmogRank / World / Japan / Hiroshima / 2026

Most polluted cities in Hiroshima, Japan, 2026

12 cities in Hiroshima, Japan ranked by their average PM2.5 so far (278 of 365 days); 12 above the WHO annual guideline (5.0 µg/m³). Worst: Onomichi at 13.4 µg/m³, #645 of 2,745 cities in the world. Cleanest: Miyoshi at 8.4. 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.

← Fukuyama 1% 0.75%0
Every city in Hiroshima, Japan ranked for 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. 1Fukuyama
    1%
  2. 2Shin’ichi
    0%
  3. 3Onomichi
    0%
  4. 4Higashihiroshima
    0%
  5. 5Kure
    0%
  6. 6Ōtake
    0%
  7. 7Hiroshima
    0%
  8. 8Mihara
    0%
  9. 9Takehara
    0%
  10. 10Gion
    0%
  11. 11Yae
    0%
  12. 12Miyoshi
    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, 2026 · All cities in Japan, 2026 · Hiroshima now

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SmogRank, most polluted cities in Hiroshima, Japan, PM2.5, 2026 (so far), smogrank.com/jp/region/hiroshima/history/2026 (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.