What is the air quality trend in Christchurch?

Over the past 8 days, Christchurch had an average AQI of 67 based on station measurements. The worst day was 2026-07-21 with AQI 117.

How is Christchurch air quality measured?

Air quality in Christchurch is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Christchurch, New Zealand

Name: Christchurch Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Christchurch, New Zealand.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	117	31–307	53.9 µg/m³	80.0	19h	2
2026-07-20	45	13–74	11.7 µg/m³	21.3	24h	2
2026-07-19	70	13–162	23.9 µg/m³	39.7	24h	2
2026-07-18	65	15–167	21.7 µg/m³	46.4	23h	3
2026-07-17	83	21–160	28.7 µg/m³	51.5	23h	2
2026-07-16	73	26–147	23.0 µg/m³	37.7	24h	2
2026-07-15	54	9–121	15.4 µg/m³	21.8	24h	2
2026-07-14	35	13–67	9.5 µg/m³	19.8	3h	2

Back to Christchurch Air Quality