What is the air quality trend in Challans?

Over the past 8 days, Challans had an average AQI of 54 based on station measurements. The worst day was 2026-05-22 with AQI 71.

How is Challans air quality measured?

Air quality in Challans 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 Challans, France

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

Historical PM2.5 and AQI trend from monitoring stations near Challans, France.

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

169h

PM2.5 Station

169h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	50	20–176	15.5 µg/m³	38.7	20h	7
2026-05-28	48	30–81	12.3 µg/m³	45.8	24h	7
2026-05-27	65	34–182	22.5 µg/m³	39.2	24h	7
2026-05-26	57	25–113	16.1 µg/m³	33.9	24h	9
2026-05-25	62	26–199	21.5 µg/m³	16.5	24h	8
2026-05-24	41	30–57	9.9 µg/m³	14.0	24h	8
2026-05-23	42	18–75	11.1 µg/m³	15.6	24h	7
2026-05-22	71	33–156	24.6 µg/m³	21.2	5h	9

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