SmogRank / World / Latvia / September 2026

Most polluted cities in Latvia, September 2026

2 cities in Latvia ranked by their average PM2.5 over the 30 days. Worst: Rēzekne at 5.2 µg/m³, #1,684 of 2,330 cities in the world. Cleanest: Riga at 3.6. A city needs measurements on 70% of the days to be ranked.

  1. 1RēzekneRēzekne
    29
  2. 2RigaRiga
    20
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

All cities in the world, September 2026 · Latvia now

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SmogRank, most polluted cities in Latvia, PM2.5, September 2026, smogrank.com/lv/history/2026-09 (accessed 2 Oct 2026).

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