SmogRank / World / New Zealand / January 2026

Most polluted cities in New Zealand, January 2026

4 cities in New Zealand ranked by their average PM2.5 over the 31 days. Worst: Timaru at 5.3 µg/m³, #2,032 of 2,281 cities in the world. Cleanest: Dunedin at 1.9. A city needs measurements on 70% of the days to be ranked.

← Timaru 5.3 µg/m³ 20 µg/m³0
Every city in New Zealand ranked for January 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. 1TimaruCanterbury
    5.3
  2. 2ChristchurchCanterbury
    4.3
  3. 3RangioraCanterbury
    4.2
  4. 4Dunedinlow-cost sensorsOtago
    1.9
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, January 2026 · New Zealand now

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SmogRank, most polluted cities in New Zealand, PM2.5, January 2026, smogrank.com/nz/history/2026-01 (accessed 2 Oct 2026).

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