SmogRank / Countries / United Kingdom / March 2025

Most polluted cities in United Kingdom, March 2025

6 cities in United Kingdom ranked by their average PM2.5 over the 31 days. Worst: Birmingham at 25.9 µg/m³, #235 of 2,218 cities in the world. Cleanest: Dagenham at 12.0. A city needs measurements on 70% of the days to be ranked.

  1. 1Birminghamlow-cost sensorsEngland
    25.9
  2. 2BexleyEngland
    19.4
  3. 3LondonEngland
    18.4
  4. 4GraysEngland
    17.7
  5. 5NorthamptonEngland
    17.4
  6. 6DagenhamEngland
    12.0
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, March 2025 · United Kingdom now