What is the air quality trend in Changtan?

Over the past 8 days, Changtan had an average AQI of 63 based on station measurements. The worst day was 2026-07-18 with AQI 74.

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
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

132h

PM2.5 Station

132h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	59	59–59	15.9 µg/m³	1h	2
2026-07-21	65	32–85	19.3 µg/m³	13h	2
2026-07-20	69	35–101	20.7 µg/m³	20h	2
2026-07-19	60	25–143	17.4 µg/m³	22h	2
2026-07-18	74	30–167	25.0 µg/m³	16h	2
2026-07-17	71	15–153	22.6 µg/m³	18h	2
2026-07-16	55	19–78	15.0 µg/m³	22h	2
2026-07-15	57	19–134	16.5 µg/m³	20h	2

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