What is the air quality trend in Changtan?

Over the past 8 days, Changtan had an average AQI of 67 based on station measurements. The worst day was 2026-10-15 with AQI 91.

How is Changtan air quality measured?

Air quality in Changtan 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 Changtan, China

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

157h

PM2.5 Station

157h · 2 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	44–62	14.0 µg/m³	3h	2
2026-10-20	62	30–89	18.2 µg/m³	22h	5
2026-10-19	60	27–84	17.0 µg/m³	23h	5
2026-10-18	52	19–113	14.4 µg/m³	23h	4
2026-10-17	51	33–72	13.2 µg/m³	24h	4
2026-10-16	81	60–112	26.2 µg/m³	21h	5
2026-10-15	91	66–149	30.7 µg/m³	22h	6
2026-10-14	88	25–162	30.5 µg/m³	19h	6

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