What is the air quality trend in Changtan?

Over the past 15 days, Changtan had an average AQI of 52 based on station measurements. The worst day was 2026-09-05 with AQI 70.

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.

109

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

329h

PM2.5 Station

329h · 4 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	70	35–97	21.7 µg/m³	19h	4
2026-09-04	56	25–94	15.2 µg/m³	24h	5
2026-09-03	49	21–78	12.5 µg/m³	24h	6
2026-09-02	49	25–90	13.4 µg/m³	23h	6
2026-09-01	43	21–87	10.9 µg/m³	24h	4
2026-08-31	47	23–67	12.1 µg/m³	23h	5
2026-08-30	50	26–71	12.7 µg/m³	23h	6
2026-08-29	61	47–72	16.8 µg/m³	24h	7
2026-08-28	59	25–90	16.4 µg/m³	24h	6
2026-08-27	50	32–66	12.7 µg/m³	23h	6
2026-08-26	54	36–78	14.2 µg/m³	23h	6
2026-08-25	50	35–66	12.7 µg/m³	24h	5
2026-08-24	51	25–81	13.4 µg/m³	24h	6
2026-08-23	50	29–71	12.9 µg/m³	24h	5
2026-08-22	45	40–51	10.8 µg/m³	3h	5

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