SmogRank / Countries / Japan / Gunma

Most polluted cities in Gunma, Japan

6 measured cities, last 7 days; 0 above the WHO 24-hour guideline. Worst: Kiryū at 7.1 µg/m³, #1,166 in the world.

6 good

  1. 1Kiryū 7.1
  2. 2Ōta 6.8
  3. 3Shibukawa 6.6
  4. 4Tomioka 6.0
  5. 5Numata 5.3
  6. 6Nakanojō 5.2
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Estimated: cities without a monitor

Gunma 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
Maebashi≈ 7 µg/m³Good
Isesaki≈ 7 µg/m³Good
Fujioka≈ 7 µg/m³Good
Annaka≈ 3 µg/m³Good
Midori≈ 7 µg/m³Good
Kamikoizumi≈ 6 µg/m³Good
Kanekomachi≈ 3 µg/m³Good
Tamamura≈ 7 µg/m³Good
Yoshii≈ 3 µg/m³Good
Ōwa≈ 8 µg/m³Good
Ogura≈ 3 µg/m³Good
Ōmamachō-ōmama≈ 7 µg/m³Good
Minakami≈ 2 µg/m³Good

Updated 2026-10-01 17:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.