What is the air quality trend in Hongkou?

Over the past 8 days, Hongkou had an average AQI of 70 based on station measurements. The worst day was 2026-10-15 with AQI 87.

How is Hongkou air quality measured?

Air quality in Hongkou 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 Hongkou, China

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

Historical PM2.5 and AQI trend from monitoring stations near Hongkou, China.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 27 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	65	56–81	18.8 µg/m³	14.5	4h	23
2026-10-20	76	36–109	24.4 µg/m³	52.4	24h	22
2026-10-19	63	49–79	18.0 µg/m³	19.2	24h	20
2026-10-18	61	51–81	17.0 µg/m³	27.0	24h	21
2026-10-17	60	45–77	16.3 µg/m³	20.0	24h	20
2026-10-16	73	60–97	22.7 µg/m³	17.5	23h	20
2026-10-15	87	67–124	29.1 µg/m³	1.5	24h	18
2026-10-14	80	51–142	25.5 µg/m³	5.5	17h	12

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