SmogRank / World / Asia / Japan / Hiroshima

Most polluted cities in Hiroshima, Japan

12 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Onomichi at 9.4 µg/m³, #445 in the world.

Hiroshima: 12 measured citiesKagawa: 7 measured citiesOkayama: 10 measured citiesShimane: 8 measured citiesTokushima: 7 measured citiesTottori: 2 measured citiesYamaguchi: 13 measured citiesEhime: 9 measured cities#11 Yae: 5.9 µg/m³#12 Miyoshi: 5.9 µg/m³#10 Gion: 6.5 µg/m³#8 Takehara: 6.9 µg/m³#9 Mihara: 6.9 µg/m³#7 Ōtake: 7.0 µg/m³#6 Hiroshima: 7.1 µg/m³#5 Kure: 7.2 µg/m³#4 Higashihiroshima: 7.5 µg/m³#3 Shin’ichi: 8.2 µg/m³#2 Fukuyama: 8.5 µg/m³#1 Onomichi: 9.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Onomichi 9.4 WHO 24-hour guideline
Every measured city in Hiroshima, Japan, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1Onomichi 52
  2. 2Fukuyama 47
  3. 3Shin’ichi 46
  4. 4Higashihiroshima 42
  5. 5Kure 40
  6. 6Hiroshima 39
  7. 7Ōtake 39
  8. 8Takehara 38
  9. 9Mihara 38
  10. 10Gion 36
  11. 11Yae 33
  12. 12Miyoshi 33
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

Estimated: cities without a monitor

Hiroshima cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Hatsukaichi≈ 10 µg/m³Moderate
Fuchū≈ 9 µg/m³Moderate
Fuchūchō≈ 9 µg/m³Moderate
Kannabechō-yahiro≈ 10 µg/m³Moderate
Shōbara≈ 7 µg/m³Good
Aki-takata≈ 6 µg/m³Good
Kaitaichi≈ 9 µg/m³Moderate
Ōno-hara≈ 10 µg/m³Moderate
Innoshima≈ 10 µg/m³Moderate
Etajima≈ 9 µg/m³Moderate
Kumano≈ 9 µg/m³Moderate
Kōzan≈ 9 µg/m³Moderate

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SmogRank, most polluted cities in Hiroshima, Japan, PM2.5, last 30 days to 2 Oct 2026, 02:00 UTC, smogrank.com/jp/region/hiroshima?w=30d.

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Updated 2026-10-02 02:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.