What is the air quality trend in Tuen Mun San Hui?

Over the past 8 days, Tuen Mun San Hui had an average AQI of 76 based on station measurements. The worst day was 2026-10-14 with AQI 112.

How is Tuen Mun San Hui air quality measured?

Air quality in Tuen Mun San Hui 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 Tuen Mun San Hui, Hong Kong

Name: Tuen Mun San Hui Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Tuen Mun San Hui, Hong Kong.

111

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	84	74–91	28.0 µg/m³	30.1	3h	2
2026-10-20	55	30–74	15.1 µg/m³	15.9	24h	2
2026-10-19	64	31–84	19.3 µg/m³	20.3	24h	2
2026-10-18	50	31–87	12.9 µg/m³	13.9	24h	2
2026-10-17	60	42–77	16.3 µg/m³	17.3	24h	2
2026-10-16	84	61–98	27.9 µg/m³	30.7	24h	2
2026-10-15	99	84–121	34.4 µg/m³	39.0	24h	2
2026-10-14	112	94–139	39.9 µg/m³	46.4	20h	2

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