What is the air quality trend in Fortress Hill?

Over the past 15 days, Fortress Hill had an average AQI of 33 based on station measurements. The worst day was 2026-08-08 with AQI 140.

How is Fortress Hill air quality measured?

Air quality in Fortress Hill 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 Fortress Hill, Hong Kong

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

Historical PM2.5 and AQI trend from monitoring stations near Fortress Hill, Hong Kong.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

321h

PM2.5 Station

321h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-08-08	140	129–152	51.7 µg/m³	58.5	8h	2
2026-08-07	53	29–102	14.6 µg/m³	15.6	24h	2
2026-08-06	40	23–58	9.7 µg/m³	10.3	24h	2
2026-08-05	58	32–72	15.4 µg/m³	16.1	24h	2
2026-08-04	15	4–37	3.6 µg/m³	4.0	24h	2
2026-08-03	15	1–43	3.6 µg/m³	3.9	23h	2
2026-08-02	3	1–9	0.7 µg/m³	1.1	23h	2
2026-08-01	6	1–9	1.2 µg/m³	1.7	16h	1
2026-07-31	8	1–28	1.8 µg/m³	2.2	21h	2
2026-07-30	37	3–55	8.5 µg/m³	9.1	24h	2
2026-07-29	29	7–55	6.9 µg/m³	7.5	24h	2
2026-07-28	7	1–18	1.7 µg/m³	2.3	23h	2
2026-07-27	32	12–53	7.7 µg/m³	8.5	24h	2
2026-07-26	33	12–58	8.1 µg/m³	9.1	24h	2
2026-07-25	20	7–47	4.9 µg/m³	6.0	15h	2

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