What is the air quality trend in Grimsby?

Over the past 5 days, Grimsby had an average AQI of 113 based on station measurements. The worst day was 2026-07-17 with AQI 288.

How is Grimsby air quality measured?

Air quality in Grimsby 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 Grimsby, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

18h

PM2.5 Station

18h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	38	34–43	9.3 µg/m³	2h	3
2026-07-20	45	25–93	12.9 µg/m³	6h	3
2026-07-19	77	30–160	28.9 µg/m³	4h	3
2026-07-18	119	31–190	69.0 µg/m³	4h	3
2026-07-17	288	274–301	237.4 µg/m³	2h	3

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