What is the air quality trend in Calais?

Over the past 15 days, Calais had an average AQI of 46 based on station measurements. The worst day was 2026-07-11 with AQI 55.

How is Calais air quality measured?

Air quality in Calais 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 Calais, France

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 11 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	22	22–22	5.3 µg/m³	1h	11
2026-07-21	51	10–163	15.3 µg/m³	24h	9
2026-07-20	48	25–152	12.8 µg/m³	24h	7
2026-07-19	48	25–121	13.0 µg/m³	24h	8
2026-07-18	44	21–71	11.1 µg/m³	24h	7
2026-07-17	47	27–87	11.9 µg/m³	24h	7
2026-07-16	51	19–115	14.2 µg/m³	24h	6
2026-07-15	47	4–113	12.1 µg/m³	24h	5
2026-07-14	51	28–86	13.3 µg/m³	24h	5
2026-07-13	43	21–120	11.3 µg/m³	24h	5
2026-07-12	53	13–169	16.4 µg/m³	24h	4
2026-07-11	55	17–119	16.1 µg/m³	24h	4
2026-07-10	50	9–208	17.5 µg/m³	24h	5
2026-07-09	36	19–55	8.6 µg/m³	24h	6
2026-07-08	48	17–159	13.9 µg/m³	22h	6

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