SmogRank / World / Asia / Japan / Tokyo

Most polluted cities in Tokyo, Japan

10 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Higashikurume at 6.4 µg/m³, #1,606 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.

Ibaraki: 19 measured citiesKanagawa: 21 measured citiesSaitama: 31 measured citiesShizuoka: 19 measured citiesTokyo: 10 measured citiesYamanashi: 7 measured citiesChiba: 31 measured cities#10 Ōme: 4.4 µg/m³#8 Machida: 5.1 µg/m³#9 Akishima: 5.1 µg/m³#7 Fuchū: 5.2 µg/m³#6 Higashimurayama: 5.3 µg/m³#5 Tokyo: 5.7 µg/m³#4 Kodaira: 5.8 µg/m³#2 Yokota: 6.0 µg/m³#3 Hachiōji: 6.0 µg/m³#1 Higashikurume: 6.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Higashikurume 0% 0.75%0
Every measured city in Tokyo, 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. 1Higashikurume 0%
  2. 2Yokota 0%
  3. 2Hachiōji 0%
  4. 4Kodaira 0%
  5. 5Tokyo 0%
  6. 6Higashimurayama 0%
  7. 7Fuchū 0%
  8. 8Machida 0%
  9. 8Akishima 0%
  10. 10Ōme 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

Tokyo 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
Ōta≈ 8 µg/m³Good
Katsushika≈ 6 µg/m³Good
Nakano≈ 8 µg/m³Good
Kita≈ 10 µg/m³Moderate
Minato City≈ 9 µg/m³Moderate
Chōfu≈ 8 µg/m³Good
Nishi-Tokyo-shi≈ 8 µg/m³Good
Hino≈ 8 µg/m³Good
Tachikawa≈ 8 µg/m³Good
Chūō≈ 10 µg/m³Moderate
Musashino≈ 8 µg/m³Good
Tama≈ 8 µg/m³Good
Kokubunji≈ 8 µg/m³Good
Koganei≈ 8 µg/m³Good
Inagi≈ 8 µg/m³Good
Komae≈ 8 µg/m³Good
Higashiyamato≈ 8 µg/m³Good
Akiruno≈ 6 µg/m³Good
Kunitachi≈ 8 µg/m³Good
Kiyose≈ 8 µg/m³Good
Musashimurayama≈ 8 µg/m³Good
Fussa≈ 6 µg/m³Good
Hamura≈ 6 µg/m³Good
Ōizumi-gakuenchō≈ 8 µg/m³Good
Hakonegasaki≈ 6 µg/m³Good
Narimasu≈ 8 µg/m³Good
Machiya≈ 10 µg/m³Moderate
Tōyō≈ 6 µg/m³Good
Itsukaichi≈ 6 µg/m³Good
Ōizumimachi≈ 8 µg/m³Good
Ebara≈ 8 µg/m³Good
Asagaya-minami≈ 8 µg/m³Good
Den’enchōfu≈ 8 µg/m³Good
Takenotsuka≈ 10 µg/m³Moderate
Shimoigusa≈ 8 µg/m³Good
Aoi≈ 6 µg/m³Good
Iwai≈ 6 µg/m³Good
Sekimachi-minami≈ 8 µg/m³Good
Kamiigusa≈ 8 µg/m³Good
Ōgi≈ 10 µg/m³Moderate

Bad-air episodes in Tokyo

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 Tokyo, Japan, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/jp/region/tokyo?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.