SmogRank / Countries / New Zealand / May 2026

Most polluted cities in New Zealand, May 2026

4 cities in New Zealand ranked by their average PM2.5 over the 31 days. Worst: Rangiora at 13.7 µg/m³, #258 of 2,243 cities in the world. Cleanest: Christchurch at 10.7. A city needs measurements on 70% of the days to be ranked.

  1. 1RangioraCanterbury
    13.7
  2. 2TimaruCanterbury
    13.3
  3. 3Dunedinlow-cost sensorsOtago
    11.2
  4. 4ChristchurchCanterbury
    10.7
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, May 2026 · New Zealand now

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SmogRank, most polluted cities in New Zealand, PM2.5, May 2026, smogrank.com/nz/history/2026-05 (accessed 2 Oct 2026).

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