SmogRank / Countries / Latvia / September 2025

Most polluted cities in Latvia, September 2025

4 cities in Latvia ranked by their average PM2.5 over the 30 days. Worst: Ventspils at 8.9 µg/m³, #633 of 2,439 cities in the world. Cleanest: Riga at 6.6. A city needs measurements on 70% of the days to be ranked.

  1. 1VentspilsVentspils
    8.9
  2. 2LiepājaLiepaja
    7.9
  3. 3RēzekneRēzekne
    7.6
  4. 4RigaRiga
    6.6
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, September 2025 · Latvia now