SmogRank / New Zealand / Canterbury / Rangiora
Rangiora, month by month
Rangiora has a measured daily mean on 942 days since 6 January 2024. Its worst month was July 2026, at 71 US AQI (19.8 µg/m³), 338th of 2,784 cities on that month's world ranking. Its cleanest was December 2025, at 19 US AQI (3.5 µg/m³). 2025 averaged 49 US AQI (8.9 µg/m³), against 51 US AQI (9.2 µg/m³) in 2024.
Every month since 2024
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
Months without a mean, and why
3 months
| Month | Why |
|---|---|
| Oct 2025 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | 17 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Rangiora's worst months
| Month | US AQI | World rank |
|---|---|---|
| July 2026 | 7119.8 µg/m³ | 338thof 2,784 |
| June 2025 | 6918.8 µg/m³ | 263rdof 2,508 |
| July 2025 | 6918.7 µg/m³ | 239thof 2,889 |
| July 2024 | 6717.5 µg/m³ | 128thof 2,566 |
| June 2024 | 6516.4 µg/m³ | 163rdof 2,563 |
| May 2024 | 6315.8 µg/m³ | 243rdof 2,684 |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Rangiora's worst days
| Day | US AQI |
|---|---|
| 3 Jul 2026 | 15764.4 µg/m³ |
| 15 Aug 2024 | 14553.4 µg/m³ |
| 2 Jun 2025 | 12545.4 µg/m³ |
| 18 Jul 2026 | 12545.2 µg/m³ |
| 19 Jul 2026 | 12043.1 µg/m³ |
| 3 Jun 2025 | 11440.6 µg/m³ |
| 23 Jul 2025 | 11240.1 µg/m³ |
| 27 Jul 2025 | 11139.6 µg/m³ |
| 7 Jun 2026 | 10938.8 µg/m³ |
| 21 Jul 2026 | 10738.0 µg/m³ |
Daily means, the highest since 6 Jan 2024; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Rangiora, New Zealand, 6 Jan 2024 – 12 Oct 2026. Monitor data from Environment Canterbury via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/nz/rangiora/history (accessed 12 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Rangiora now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).