What is the air quality trend in Stratford?

Over the past 15 days, Stratford had an average AQI of 37 based on station measurements. The worst day was 2026-05-17 with AQI 68.

How is Stratford air quality measured?

Air quality in Stratford 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 Stratford, Canada

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

323h

PM2.5 Station

323h · 2 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	28	4–148	7.7 µg/m³	2.9	17h	2
2026-05-29	20	4–66	5.0 µg/m³	2.7	24h	2
2026-05-28	20	6–74	5.1 µg/m³	2.8	22h	2
2026-05-27	40	4–185	14.1 µg/m³	5.4	23h	2
2026-05-26	36	5–156	11.3 µg/m³	5.7	22h	2
2026-05-25	55	10–191	20.1 µg/m³	11.2	24h	2
2026-05-24	21	4–73	5.5 µg/m³	3.3	23h	2
2026-05-23	42	4–157	13.9 µg/m³	3.8	23h	2
2026-05-22	15	4–52	3.7 µg/m³	2.9	24h	2
2026-05-21	39	4–280	16.8 µg/m³	2.2	24h	2
2026-05-20	46	6–197	18.1 µg/m³	6.0	21h	1
2026-05-19	32	4–86	8.0 µg/m³	6.9	24h	1
2026-05-18	57	14–107	16.5 µg/m³	17.6	24h	1
2026-05-17	68	23–154	21.5 µg/m³	22.3	24h	1
2026-05-16	47	42–55	11.5 µg/m³	15.7	4h	2

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