What is the air quality trend in Annex?

Over the past 8 days, Annex had an average AQI of 46 based on station measurements. The worst day was 2026-10-19 with AQI 67.

How is Annex air quality measured?

Air quality in Annex 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 Annex, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 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	21	21–21	5.0 µg/m³	—	1h	6
2026-10-20	35	6–114	10.5 µg/m³	21.5	24h	4
2026-10-19	67	2–162	23.8 µg/m³	32.5	24h	2
2026-10-18	16	1–124	4.1 µg/m³	4.7	24h	3
2026-10-17	57	4–166	19.8 µg/m³	33.5	24h	3
2026-10-16	64	3–184	24.3 µg/m³	28.4	20h	1
2026-10-15	66	1–154	22.6 µg/m³	33.0	24h	2
2026-10-14	45	2–103	13.4 µg/m³	22.1	23h	3

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