What is the air quality trend in Québec?

Over the past 15 days, Québec had an average AQI of 47 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

335h

PM2.5 Station

335h · 42 stations

Temperature GFS model

56pt

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	78	10–159	26.5 µg/m³	24h	40
2026-05-27	44	2–129	12.3 µg/m³	24h	41
2026-05-26	58	26–130	16.7 µg/m³	24h	42
2026-05-25	58	6–139	17.5 µg/m³	24h	41
2026-05-24	30	5–74	7.8 µg/m³	24h	41
2026-05-23	30	5–101	8.6 µg/m³	24h	41
2026-05-22	36	2–124	11.4 µg/m³	23h	38
2026-05-21	20	1–128	6.3 µg/m³	24h	36
2026-05-20	56	1–146	18.2 µg/m³	24h	40
2026-05-19	40	5–152	11.9 µg/m³	24h	41
2026-05-18	22	2–111	6.3 µg/m³	24h	41
2026-05-17	62	1–153	20.9 µg/m³	24h	40
2026-05-16	30	7–90	8.3 µg/m³	14h	42

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