SmogRank / World / Asia / Japan / Hiroshima

Most polluted cities in Hiroshima, Japan

12 measured cities, last 7 days; 0 above the WHO 24-hour guideline. Worst: Onomichi at 10.7 µg/m³, #653 in the world.

Hiroshima: 12 measured citiesKagawa: 7 measured citiesOkayama: 10 measured citiesShimane: 8 measured citiesTokushima: 7 measured citiesTottori: 3 measured citiesYamaguchi: 13 measured citiesEhime: 9 measured cities#12 Yae: 6.8 µg/m³#11 Miyoshi: 6.9 µg/m³#10 Takehara: 7.5 µg/m³#9 Mihara: 7.9 µg/m³#8 Gion: 8.3 µg/m³#7 Kure: 8.5 µg/m³#6 Ōtake: 8.6 µg/m³#4 Hiroshima: 8.8 µg/m³#5 Higashihiroshima: 8.8 µg/m³#3 Shin’ichi: 9.0 µg/m³#2 Fukuyama: 9.3 µg/m³#1 Onomichi: 10.7 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Onomichi 10.7 µg/m³ 15 µg/m³ WHO 24-hour guideline0
Every measured city in Hiroshima, Japan, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Onomichi 54▼221
  2. 2Fukuyama 51▼340
  3. 3Shin’ichi 50▼348
  4. 4Hiroshima 49▼304
  5. 5Higashihiroshima 49▼361
  6. 6Ōtake 48▼401
  7. 7Kure 47▼443
  8. 8Gion 46▼219
  9. 9Mihara 44▼352
  10. 10Takehara 42▼458
  11. 11Miyoshi 38▼262
  12. 12Yae 38▼241
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 7 days to 2 Oct 2026, 07:00 UTC, smogrank.com/jp/region/hiroshima?w=7d.

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