SmogRank / World / New Zealand / September 2025

Most polluted cities in New Zealand, September 2025

7 cities in New Zealand ranked by their average PM2.5 over the 30 days. Worst: Taupo at 8.1 µg/m³, #1,057 of 2,711 cities in the world. Cleanest: Dunedin at 2.3. A city needs measurements on 70% of the days to be ranked.

← Taupo 8.1 µg/m³ 20 µg/m³0
Every city in New Zealand ranked for September 2025, 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. 1TaupoWaikato Region
    45
  2. 2RangioraCanterbury
    37
  3. 3TimaruCanterbury
    35
  4. 4HamiltonWaikato Region
    34
  5. 5ChristchurchCanterbury
    30
  6. 6AshburtonCanterbury
    27
  7. 7Dunedinlow-cost sensorsOtago
    13
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 2025 · New Zealand now

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SmogRank, most polluted cities in New Zealand, PM2.5, September 2025, smogrank.com/nz/history/2025-09 (accessed 2 Oct 2026).

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