What is the air quality trend in Stouffville?

Over the past 8 days, Stouffville had an average AQI of 48 based on station measurements. The worst day was 2026-05-25 with AQI 64.

How is Stouffville air quality measured?

Air quality in Stouffville 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 Stouffville, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 12 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	30	29–32	7.3 µg/m³	2.2	4h	12
2026-05-29	45	15–93	11.9 µg/m³	12.1	24h	17
2026-05-28	45	19–157	13.2 µg/m³	1.6	24h	16
2026-05-27	55	25–155	16.3 µg/m³	6.1	24h	16
2026-05-26	48	24–91	13.1 µg/m³	6.0	24h	16
2026-05-25	64	27–137	19.2 µg/m³	11.2	24h	18
2026-05-24	45	14–89	12.0 µg/m³	7.1	24h	18
2026-05-23	58	23–108	16.4 µg/m³	2.7	20h	18

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