What is the air quality trend in City One?

Over the past 15 days, City One had an average AQI of 55 based on station measurements. The worst day was 2026-05-22 with AQI 82.

How is City One air quality measured?

Air quality in City One 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 City One, Hong Kong

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

Historical PM2.5 and AQI trend from monitoring stations near City One, 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	56	30–77	15.0 µg/m³	15.8	23h	2
2026-05-28	54	42–60	13.7 µg/m³	14.6	24h	2
2026-05-27	50	43–60	12.2 µg/m³	13.1	24h	2
2026-05-26	51	43–62	12.7 µg/m³	13.3	24h	1
2026-05-25	54	43–69	14.1 µg/m³	15.3	24h	2
2026-05-24	69	60–156	20.9 µg/m³	22.6	24h	2
2026-05-23	73	64–81	22.4 µg/m³	23.7	24h	2
2026-05-22	82	64–103	26.9 µg/m³	28.8	23h	1
2026-05-21	80	68–96	26.1 µg/m³	28.1	24h	2
2026-05-20	50	8–79	13.6 µg/m³	14.6	24h	2
2026-05-19	42	10–71	11.0 µg/m³	12.1	24h	2
2026-05-18	44	16–60	10.8 µg/m³	12.7	24h	2
2026-05-17	36	26–49	8.6 µg/m³	9.7	24h	1
2026-05-16	34	15–58	8.2 µg/m³	9.5	24h	2
2026-05-15	52	52–52	12.6 µg/m³	15.9	1h	2

Back to City One Air Quality