What is the air quality trend in Courtenay?

Over the past 20 days, Courtenay had an average AQI of 50 based on station measurements. The worst day was 2026-05-20 with AQI 85.

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

367h

PM2.5 Station

367h · 2 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	51	8–160	16.4 µg/m³	17h	2
2026-05-29	33	13–77	8.6 µg/m³	20h	2
2026-05-28	27	12–56	6.6 µg/m³	19h	2
2026-05-27	41	4–158	12.9 µg/m³	17h	2
2026-05-26	57	15–170	20.9 µg/m³	16h	2
2026-05-25	42	2–132	12.3 µg/m³	22h	2
2026-05-24	50	18–120	14.3 µg/m³	21h	3
2026-05-23	43	10–152	12.6 µg/m³	19h	2
2026-05-22	42	6–108	12.6 µg/m³	15h	2
2026-05-21	44	7–181	14.7 µg/m³	21h	2
2026-05-20	85	2–386	44.2 µg/m³	17h	2
2026-05-19	59	13–161	19.6 µg/m³	18h	2
2026-05-18	33	7–80	8.6 µg/m³	13h	1
2026-05-17	52	14–105	16.1 µg/m³	9h	1
2026-05-16	72	8–356	34.0 µg/m³	18h	3
2026-05-15	61	10–168	20.1 µg/m³	22h	3
2026-05-14	52	16–121	15.0 µg/m³	19h	3
2026-05-13	50	6–123	14.6 µg/m³	21h	3
2026-05-12	60	15–189	22.3 µg/m³	21h	3
2026-05-11	48	16–158	14.5 µg/m³	22h	3

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