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
    8.1
  2. 2RangioraCanterbury
    6.7
  3. 3TimaruCanterbury
    6.3
  4. 4HamiltonWaikato Region
    6.2
  5. 5ChristchurchCanterbury
    5.4
  6. 6AshburtonCanterbury
    4.9
  7. 7Dunedinlow-cost sensorsOtago
    2.3
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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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