SmogRank / Countries / United Kingdom / January 2025

Most polluted cities in United Kingdom, January 2025

4 cities in United Kingdom ranked by their average PM2.5 over the 31 days. Worst: Grays at 14.4 µg/m³, #300 of 1,937 cities in the world. Cleanest: Dartford at 12.7. A city needs measurements on 70% of the days to be ranked.

  1. 1GraysEngland
    14.4
  2. 2LondonEngland
    13.8
  3. 3BexleyEngland
    12.8
  4. 4DartfordEngland
    12.7
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, January 2025 · United Kingdom now