What is the air quality trend in Cheung Chau?

Over the past 3 days, Cheung Chau had an average AQI of 57 based on station measurements. The worst day was 2026-05-27 with AQI 60.

How is Cheung Chau air quality measured?

Air quality in Cheung Chau 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 Cheung Chau, Hong Kong

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

Historical PM2.5 and AQI trend from monitoring stations near Cheung Chau, Hong Kong.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

47h

PM2.5 Station

47h · 2 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	56	30–74	15.1 µg/m³	15.5	19h	2
2026-05-28	56	47–62	14.5 µg/m³	15.1	24h	2
2026-05-27	60	59–61	16.3 µg/m³	16.7	4h	2

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