What is the air quality trend in Downsview-Roding-CFB?

Over the past 8 days, Downsview-Roding-CFB had an average AQI of 39 based on station measurements. The worst day was 2026-10-19 with AQI 60.

How is Downsview-Roding-CFB air quality measured?

Air quality in Downsview-Roding-CFB 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 Downsview-Roding-CFB, Canada

Name: Downsview-Roding-CFB Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Downsview-Roding-CFB, Canada.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 6 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	17	17–17	4.2 µg/m³	—	1h	6
2026-10-20	27	4–84	7.6 µg/m³	8.8	24h	2
2026-10-19	60	4–155	20.0 µg/m³	23.5	24h	2
2026-10-18	12	1–89	3.2 µg/m³	3.8	24h	2
2026-10-17	50	4–158	16.9 µg/m³	22.6	24h	2
2026-10-16	54	5–173	18.6 µg/m³	21.5	24h	2
2026-10-15	57	2–136	19.1 µg/m³	22.7	24h	2
2026-10-14	39	1–103	11.8 µg/m³	16.9	23h	3

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