What is the air quality trend in Orillia?

Over the past 8 days, Orillia had an average AQI of 95 based on station measurements. The worst day was 2026-07-14 with AQI 154.

How is Orillia air quality measured?

Air quality in Orillia 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 Orillia, Canada

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	69	52–119	20.4 µg/m³	23h	3
2026-07-20	29	12–60	7.0 µg/m³	24h	2
2026-07-19	44	18–86	11.7 µg/m³	24h	3
2026-07-18	100	21–157	35.8 µg/m³	24h	3
2026-07-17	104	40–187	45.9 µg/m³	24h	3
2026-07-16	149	58–297	76.4 µg/m³	24h	3
2026-07-15	114	45–160	41.2 µg/m³	24h	2
2026-07-14	154	154–154	61.9 µg/m³	1h	2

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