What is the air quality trend in La Cité-Limoilou?

Over the past 8 days, La Cité-Limoilou had an average AQI of 12 based on station measurements. The worst day was 2026-10-19 with AQI 28.

How is La Cité-Limoilou air quality measured?

Air quality in La Cité-Limoilou 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 La Cité-Limoilou, Canada

Name: La Cité-Limoilou Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near La Cité-Limoilou, Canada.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 57 stations

Temperature GFS model

27pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	10	5–24	2.4 µg/m³	—	9h	58
2026-10-20	16	2–57	3.9 µg/m³	0.0	24h	55
2026-10-19	28	6–96	8.1 µg/m³	0.0	24h	57
2026-10-18	17	7–83	4.3 µg/m³	0.0	24h	57
2026-10-17	6	1–51	1.4 µg/m³	—	24h	53
2026-10-16	8	2–23	1.9 µg/m³	—	24h	56
2026-10-15	5	1–23	1.2 µg/m³	—	24h	50
2026-10-14	6	1–13	1.4 µg/m³	0.0	14h	49

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