What is the air quality trend in Greater Sudbury?

Over the past 6 days, Greater Sudbury had an average AQI of 44 based on station measurements. The worst day was 2026-07-18 with AQI 112.

How is Greater Sudbury air quality measured?

Air quality in Greater Sudbury 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 Greater Sudbury, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

22h

PM2.5 Station

22h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	16	14–18	3.7 µg/m³	4h	1
2026-07-21	26	24–27	6.2 µg/m³	3h	1
2026-07-20	44	16–87	13.4 µg/m³	5h	1
2026-07-19	47	15–117	14.7 µg/m³	4h	1
2026-07-18	112	55–158	41.7 µg/m³	4h	1
2026-07-17	24	23–26	5.9 µg/m³	2h	1

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