SmogRank / Countries / Australia / December 2025

Most polluted cities in Australia, December 2025

9 cities in Australia ranked by their average PM2.5 over the 31 days. Worst: Sydney at 6.9 µg/m³, #1,696 of 2,360 cities in the world. Cleanest: Bendigo at 1.8. A city needs measurements on 70% of the days to be ranked.

  1. 1Sydneylow-cost sensorsNew South Wales
    6.9
  2. 2GeelongVictoria
    6.1
  3. 3Melbournelow-cost sensorsVictoria
    5.3
  4. 4Bacchus MarshVictoria
    4.9
  5. 5TraralgonVictoria
    4.4
  6. 6BallaratVictoria
    2.4
  7. 7MilduraVictoria
    2.2
  8. 8WangarattaVictoria
    1.9
  9. 9BendigoVictoria
    1.8
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, December 2025 · Australia now