SmogRank / Countries / New Zealand / August 2025

Most polluted cities in New Zealand, August 2025

7 cities in New Zealand ranked by their average PM2.5 over the 31 days. Worst: Rangiora at 14.2 µg/m³, #282 of 2,289 cities in the world. Cleanest: Hamilton at 5.4. A city needs measurements on 70% of the days to be ranked.

  1. 1RangioraCanterbury
    14.2
  2. 2TimaruCanterbury
    13.6
  3. 3TaupoWaikato Region
    13.1
  4. 4AshburtonCanterbury
    12.2
  5. 5ChristchurchCanterbury
    11.3
  6. 6Dunedinlow-cost sensorsOtago
    9.3
  7. 7HamiltonWaikato Region
    5.4
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, August 2025 · New Zealand now