SmogRank / World / Asia / Japan / Osaka

Most polluted cities in Osaka, Japan

16 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Higashiosaka at 7.7 µg/m³, #1,057 in the world.

About 0 people in these 7 cities breathed unhealthy air on an average day over the last 30 days.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

Hyōgo: 17 measured citiesKyoto: 14 measured citiesMie: 16 measured citiesNara: 6 measured citiesOsaka: 16 measured citiesShiga: 9 measured citiesWakayama: 9 measured cities#16 Yono: 4.7 µg/m³#15 Sayama: 5.4 µg/m³#14 Habikino: 5.5 µg/m³#13 Hirakata: 5.6 µg/m³#12 Toyonaka: 5.7 µg/m³#11 Takatsuki: 6.0 µg/m³#10 Yao: 6.2 µg/m³#9 Sennan: 6.3 µg/m³#8 Tondabayashichō: 6.4 µg/m³#5 Osaka: 6.5 µg/m³#6 Izumisano: 6.5 µg/m³#7 Izumi: 6.5 µg/m³#2 Sakai: 6.7 µg/m³#3 Kishiwada: 6.7 µg/m³#4 Kawachi-Nagano: 6.7 µg/m³#1 Higashiosaka: 7.7 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Sakai 0 0.750
Every measured city in Osaka, Japan with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1Sakai 0
  2. 1Kishiwada 0
  3. 3Osaka 0
  4. 4Tondabayashichō 0
  5. 5Sennan 0
  6. 6Toyonaka 0
  7. 7Hirakata 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

Osaka 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
Suita≈ 7 µg/m³Good
Ibaraki≈ 7 µg/m³Good
Moriguchi≈ 7 µg/m³Good
Minoh≈ 7 µg/m³Good
Kadoma≈ 7 µg/m³Good
Matsubara≈ 7 µg/m³Good
Daitō≈ 7 µg/m³Good
Ikeda≈ 7 µg/m³Good
Kaizuka≈ 6 µg/m³Good
Settsu≈ 7 µg/m³Good
Kashihara≈ 7 µg/m³Good
Katano≈ 7 µg/m³Good
Izumiōtsu≈ 5 µg/m³Good
Fujiidera≈ 7 µg/m³Good
Takaishi≈ 7 µg/m³Good
Shijōnawate≈ 7 µg/m³Good
Hannan≈ 7 µg/m³Good
Ōkubo-naka≈ 6 µg/m³Good
Minase≈ 7 µg/m³Good
Tadaoka-higashi≈ 5 µg/m³Good
Kanō≈ 7 µg/m³Good

Bad-air episodes in Osaka

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

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SmogRank, most polluted cities in Osaka, Japan, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/jp/region/osaka?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.