SmogRank / World / Japan / Miyazaki / January 2025

Most polluted cities in Miyazaki, Japan, January 2025

9 cities in Miyazaki, Japan ranked by their average PM2.5 over the 31 days. Worst: Miyakonojō at 13.7 µg/m³, #572 of 2,426 cities in the world. Cleanest: Nobeoka at 9.0. 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.

← Miyakonojō 0% 0.75%0
Every city in Miyazaki, Japan ranked for January 2025, 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. 1Miyakonojō
    0%
  2. 2Takanabe
    0%
  3. 3Hyūga
    0%
  4. 4Miyazaki
    0%
  5. 5Mitai
    0%
  6. 6Nichinan
    0%
  7. 7Shintomi
    0%
  8. 8Kobayashi
    0%
  9. 9Nobeoka
    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, January 2025 · All cities in Japan, January 2025 · Miyazaki now

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SmogRank, most polluted cities in Miyazaki, Japan, PM2.5, January 2025, smogrank.com/jp/region/miyazaki/history/2025-01 (accessed 6 Oct 2026).

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