What is the air quality trend in Whitchurch-Stouffville?

Over the past 15 days, Whitchurch-Stouffville had an average AQI of 42 based on station measurements. The worst day was 2026-05-17 with AQI 61.

How is Whitchurch-Stouffville air quality measured?

Air quality in Whitchurch-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 Whitchurch-Stouffville, Canada

Name: Whitchurch-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 Whitchurch-Stouffville, Canada.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 9 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	35	15–85	9.4 µg/m³	1.9	11h	9
2026-05-29	37	10–94	9.9 µg/m³	12.1	24h	12
2026-05-28	28	13–76	7.2 µg/m³	1.6	24h	11
2026-05-27	38	19–151	10.0 µg/m³	6.1	24h	10
2026-05-26	37	18–84	9.6 µg/m³	6.0	24h	9
2026-05-25	57	26–159	17.0 µg/m³	11.2	24h	11
2026-05-24	44	21–133	11.6 µg/m³	7.1	24h	12
2026-05-23	38	10–139	10.2 µg/m³	2.7	24h	12
2026-05-22	32	13–75	8.1 µg/m³	5.0	24h	10
2026-05-21	45	15–184	14.3 µg/m³	1.6	24h	11
2026-05-20	58	14–161	18.8 µg/m³	7.2	24h	11
2026-05-19	35	18–85	9.2 µg/m³	8.5	24h	10
2026-05-18	48	29–79	12.4 µg/m³	29.4	24h	9
2026-05-17	61	31–92	17.4 µg/m³	27.7	24h	6
2026-05-16	44	23–77	11.2 µg/m³	12.6	12h	12

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