What is the air quality trend in Gujan-Mestras?

Over the past 3 days, Gujan-Mestras had an average AQI of 40 based on station measurements. The worst day was 2026-10-19 with AQI 48.

How is Gujan-Mestras air quality measured?

Air quality in Gujan-Mestras 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 Gujan-Mestras, France

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

Historical PM2.5 and AQI trend from monitoring stations near Gujan-Mestras, France.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

44h

PM2.5 Station

44h · 2 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	34	9–63	8.6 µg/m³	—	12h	3
2026-10-20	38	12–93	10.1 µg/m³	11.1	24h	3
2026-10-19	48	23–74	12.4 µg/m³	20.3	8h	4

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