SmogRank / World / Australia / October 2026

Most polluted cities in Australia, October 2026

3 cities in Australia ranked by their average PM2.5 so far (1 of 31 days). Worst: Adelaide at 5.5 µg/m³, #2,013 of 2,606 cities in the world. Cleanest: Melbourne at 1.2. A city needs measurements on 70% of the days to be ranked.

← Adelaide 5.5 µg/m³ 20 µg/m³0
Every city in Australia ranked for October 2026, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Adelaidelow-cost sensorsSouth Australia
    31
  2. 2Sydneylow-cost sensorsNew South Wales
    13
  3. 3Melbournelow-cost sensorsVictoria
    7
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, October 2026 · Australia now

Use this board

SmogRank, most polluted cities in Australia, PM2.5, October 2026 (so far), smogrank.com/au/history/2026-10 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.