SmogRank / World / Japan / Oita / May 2026

Most polluted cities in Oita, Japan, May 2026

10 cities in Oita, Japan ranked by their average PM2.5 over the 31 days. Worst: Hita at 14.2 µg/m³, #451 of 2,852 cities in the world. Cleanest: Saiki at 7.7. 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.

← Hita 0% 0.75%0
Every city in Oita, Japan ranked for May 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. 1Hita
    0%
  2. 2Beppu
    0%
  3. 3Ōita
    0%
  4. 4Hiji
    0%
  5. 4Kunisaki
    0%
  6. 6Tsurusaki
    0%
  7. 7Nakatsu
    0%
  8. 8Tsukumiura
    0%
  9. 9Mie
    0%
  10. 10Saiki
    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, May 2026 · All cities in Japan, May 2026 · Oita now

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SmogRank, most polluted cities in Oita, Japan, PM2.5, May 2026, smogrank.com/jp/region/oita/history/2026-05 (accessed 6 Oct 2026).

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