What is the air quality trend in Yongjian?

Over the past 7 days, Yongjian had an average AQI of 57 based on station measurements. The worst day was 2026-07-16 with AQI 62.

How is Yongjian air quality measured?

Air quality in Yongjian 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 Yongjian, China

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

134h

PM2.5 Station

134h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	58	16–107	16.6 µg/m³	19h	2
2026-07-20	58	30–77	16.3 µg/m³	15h	2
2026-07-19	56	17–94	15.6 µg/m³	20h	2
2026-07-18	61	35–99	17.8 µg/m³	20h	2
2026-07-17	51	13–107	14.0 µg/m³	21h	2
2026-07-16	62	25–147	18.5 µg/m³	19h	2
2026-07-15	55	21–103	15.6 µg/m³	20h	2

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