What is the air quality trend in Yanjing?

Over the past 15 days, Yanjing had an average AQI of 54 based on station measurements. The worst day was 2026-09-05 with AQI 67.

How is Yanjing air quality measured?

Air quality in Yanjing 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 Yanjing, China

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

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

135

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 20 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	67	57–83	19.5 µg/m³	17h	16
2026-09-04	62	42–83	17.4 µg/m³	24h	18
2026-09-03	54	31–71	14.2 µg/m³	24h	17
2026-09-02	49	36–69	12.6 µg/m³	24h	18
2026-09-01	47	28–61	11.8 µg/m³	24h	16
2026-08-31	48	30–62	12.0 µg/m³	24h	16
2026-08-30	54	38–73	14.0 µg/m³	24h	19
2026-08-29	58	49–66	15.5 µg/m³	24h	21
2026-08-28	58	47–69	15.5 µg/m³	24h	21
2026-08-27	52	36–62	13.1 µg/m³	24h	19
2026-08-26	55	42–77	14.1 µg/m³	24h	17
2026-08-25	52	40–64	13.1 µg/m³	24h	16
2026-08-24	54	40–61	13.6 µg/m³	24h	20
2026-08-23	54	38–67	13.9 µg/m³	24h	17
2026-08-22	50	45–54	12.3 µg/m³	4h	17

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