SmogRank / Countries / Australia / September 2026

Most polluted cities in Australia, September 2026

3 cities in Australia ranked by their average PM2.5 over the 30 days. Worst: Sydney at 4.8 µg/m³, #1,868 of 2,332 cities in the world. Cleanest: Adelaide at 2.6. A city needs measurements on 70% of the days to be ranked.

  1. 1Sydneylow-cost sensorsNew South Wales
    4.8
  2. 2Melbournelow-cost sensorsVictoria
    4.2
  3. 3Adelaidelow-cost sensorsSouth Australia
    2.6
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 2026 · Australia now

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

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