What is the air quality trend in Château-Thierry?

Over the past 8 days, Château-Thierry had an average AQI of 43 based on station measurements. The worst day was 2026-07-18 with AQI 55.

How is Château-Thierry air quality measured?

Air quality in Château-Thierry 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 Château-Thierry, France

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

Historical PM2.5 and AQI trend from monitoring stations near Château-Thierry, France.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

143h

PM2.5 Station

143h · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	33	33–33	7.9 µg/m³	1h	4
2026-07-21	42	6–66	10.8 µg/m³	22h	3
2026-07-20	44	8–67	11.2 µg/m³	20h	3
2026-07-19	33	5–69	8.2 µg/m³	19h	3
2026-07-18	55	22–185	20.0 µg/m³	21h	2
2026-07-17	44	13–83	11.4 µg/m³	21h	3
2026-07-16	50	6–170	15.6 µg/m³	21h	2
2026-07-15	49	12–143	13.1 µg/m³	18h	2

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