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

Over the past 15 days, Tuen Mun San Hui had an average AQI of 56 based on station measurements. The worst day was 2026-05-21 with AQI 85.

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.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	57	30–76	15.4 µg/m³	15.9	19h	2
2026-05-28	55	45–60	14.2 µg/m³	14.9	24h	2
2026-05-27	52	46–57	12.8 µg/m³	13.5	24h	2
2026-05-26	52	43–62	12.8 µg/m³	13.4	24h	1
2026-05-25	58	47–73	15.4 µg/m³	16.3	24h	2
2026-05-24	73	64–136	22.5 µg/m³	23.9	24h	2
2026-05-23	78	66–86	24.8 µg/m³	26.2	24h	2
2026-05-22	85	64–103	28.1 µg/m³	30.4	23h	1
2026-05-21	85	78–96	28.1 µg/m³	30.3	24h	2
2026-05-20	54	13–77	15.0 µg/m³	16.0	24h	2
2026-05-19	44	13–78	11.6 µg/m³	12.6	24h	2
2026-05-18	43	16–57	10.5 µg/m³	12.0	24h	2
2026-05-17	36	26–49	8.6 µg/m³	9.7	24h	1
2026-05-16	35	15–67	8.6 µg/m³	9.6	24h	2
2026-05-15	43	33–56	10.6 µg/m³	11.7	5h	2

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