SmogRank / World / Japan / Yamaguchi / April 2024

Most polluted cities in Yamaguchi, Japan, April 2024

13 cities in Yamaguchi, Japan ranked by their average PM2.5 over the 30 days. Worst: Hikari at 13.8 µg/m³, #492 of 2,482 cities in the world. Cleanest: Yanai at 9.3. 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.

← Hikari 7% 6%0
Every city in Yamaguchi, Japan ranked for April 2024, 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. 1Hikari
    7%
  2. 2Kudamatsu
    7%
  3. 3Onoda
    3%
  4. 4Shimonoseki
    3%
  5. 5Ube
    3%
  6. 6Nagato
    3%
  7. 7Hagi
    3%
  8. 8Iwakuni
    0%
  9. 9Hōfu
    0%
  10. 10Shūnan
    0%
  11. 11Mine
    0%
  12. 12Yamaguchi
    0%
  13. 13Yanai
    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, April 2024 · All cities in Japan, April 2024 · Yamaguchi now

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SmogRank, most polluted cities in Yamaguchi, Japan, PM2.5, April 2024, smogrank.com/jp/region/yamaguchi/history/2024-04 (accessed 7 Oct 2026).

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