What is the air quality trend in Ciyun?

Over the past 8 days, Ciyun had an average AQI of 69 based on station measurements. The worst day was 2026-10-15 with AQI 96.

How is Ciyun air quality measured?

Air quality in Ciyun 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 Ciyun, China

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

163h

PM2.5 Station

163h · 7 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	54	54–54	13.6 µg/m³	1h	7
2026-10-20	65	18–93	19.5 µg/m³	24h	12
2026-10-19	65	32–79	18.9 µg/m³	24h	12
2026-10-18	54	34–100	14.9 µg/m³	24h	10
2026-10-17	48	15–76	12.1 µg/m³	24h	11
2026-10-16	82	53–135	26.5 µg/m³	23h	11
2026-10-15	96	42–148	32.8 µg/m³	24h	11
2026-10-14	91	71–136	30.9 µg/m³	19h	11

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