What is the air quality trend in Québec?

Over the past 3 days, Québec had an average AQI of 71 based on station measurements. The worst day was 2026-05-30 with AQI 88.

How is Québec air quality measured?

Air quality in Québec 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 Québec, Canada

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

Historical PM2.5 and AQI trend from monitoring stations near Québec, Canada.

119

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

48h

PM2.5 Station

48h · 42 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	88	51–152	29.3 µg/m³	10h	41
2026-05-29	64	11–165	22.6 µg/m³	24h	42
2026-05-28	61	10–159	19.6 µg/m³	14h	40

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