SmogRank / World / Asia / Japan / Miyazaki

Most polluted cities in Miyazaki, Japan

9 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Kobayashi at 10.6 µg/m³, #578 in the world.

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.

Kagoshima: 9 measured citiesKumamoto: 16 measured citiesMiyazaki: 9 measured citiesOita: 9 measured citiesSaga: 11 measured citiesFukuoka: 22 measured citiesEhime: 9 measured cities#9 Mitai: 7.7 µg/m³#8 Miyazaki: 8.6 µg/m³#7 Shintomi: 8.8 µg/m³#6 Nichinan: 9.3 µg/m³#5 Nobeoka: 9.9 µg/m³#4 Takanabe: 10.1 µg/m³#2 Miyakonojō: 10.3 µg/m³#3 Hyūga: 10.3 µg/m³#1 Kobayashi: 10.6 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Kobayashi 0% 0.75%0
Every measured city in Miyazaki, Japan, 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. 1Kobayashi 0%
  2. 2Miyakonojō 0%
  3. 2Hyūga 0%
  4. 4Takanabelast full day 2 Oct 0%
  5. 5Nobeoka 0%
  6. 6Nichinan 0%
  7. 7Shintomilast full day 2 Oct 0%
  8. 8Miyazaki 0%
  9. 9Mitailast full day 3 Oct 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

Estimated: cities without a monitor

Miyazaki 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
Tsuma≈ 10 µg/m³Moderate
Saito≈ 10 µg/m³Moderate
Mochibaru≈ 9 µg/m³Moderate
Kushima≈ 10 µg/m³Moderate
Honjō≈ 10 µg/m³Moderate
Ebino≈ 11 µg/m³Moderate
Kadogawa≈ 8 µg/m³Good
Kawaminami≈ 9 µg/m³Good

Bad-air episodes in Miyazaki

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

Use this board

SmogRank, most polluted cities in Miyazaki, Japan, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/jp/region/miyazaki?w=30d.

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.