What is the air quality trend in Courtenay?

Over the past 15 days, Courtenay had an average AQI of 43 based on station measurements. The worst day was 2026-10-21 with AQI 215.

How is Courtenay air quality measured?

Air quality in Courtenay 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 Courtenay, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

291h

PM2.5 Station

291h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	215	215–215	164.6 µg/m³	1h	1
2026-10-20	30	10–76	7.7 µg/m³	23h	2
2026-10-19	31	6–73	7.9 µg/m³	23h	3
2026-10-18	21	5–68	5.3 µg/m³	21h	2
2026-10-17	34	10–168	10.6 µg/m³	21h	2
2026-10-16	27	8–93	7.1 µg/m³	21h	3
2026-10-15	37	9–158	11.1 µg/m³	23h	3
2026-10-14	35	8–177	12.3 µg/m³	23h	2
2026-10-13	28	8–67	7.0 µg/m³	21h	3
2026-10-12	18	6–40	4.3 µg/m³	22h	2
2026-10-11	29	7–70	7.4 µg/m³	21h	3
2026-10-10	23	8–61	5.7 µg/m³	24h	2
2026-10-09	32	8–68	8.1 µg/m³	23h	2
2026-10-08	50	8–89	14.2 µg/m³	13h	1
2026-10-07	43	20–61	10.6 µg/m³	11h	1

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