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, #744 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 15
  2. 2Fukuyama 15
  3. 3Shin’ichi 13
  4. 4Higashihiroshima 13
  5. 5Kure 12
  6. 6Hiroshima 12
  7. 7Ōtake 12
  8. 8Takehara 12
  9. 9Mihara 12
  10. 10Gion 12
  11. 11Yae 10
  12. 12Miyoshi 10
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+

India's National Air Quality Index (CPCB), PM2.5 sub-index. 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/m³Good
Fuchū≈ 9 µg/m³Good
Fuchūchō≈ 9 µg/m³Good
Kannabechō-yahiro≈ 10 µg/m³Good
Shōbara≈ 7 µg/m³Good
Aki-takata≈ 6 µg/m³Good
Kaitaichi≈ 9 µg/m³Good
Ōno-hara≈ 10 µg/m³Good
Innoshima≈ 10 µg/m³Good
Etajima≈ 9 µg/m³Good
Kumano≈ 9 µg/m³Good
Kōzan≈ 9 µg/m³Good

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SmogRank, most polluted cities in Hiroshima, Japan, PM2.5, last 30 days to 2 Oct 2026, 03:00 UTC, smogrank.com/jp/region/hiroshima?w=30d.

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Updated 2026-10-02 03:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the India AQI PM2.5 sub-index.