What is the air quality trend in Granby?

Over the past 8 days, Granby had an average AQI of 56 based on station measurements. The worst day was 2026-07-14 with AQI 90.

How is Granby air quality measured?

Air quality in Granby 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 Granby, Canada

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	46	23–74	11.9 µg/m³	10.5	21h	3
2026-07-20	38	18–91	9.7 µg/m³	7.6	24h	3
2026-07-19	46	13–159	13.8 µg/m³	6.8	24h	3
2026-07-18	59	20–165	19.9 µg/m³	13.1	24h	3
2026-07-17	42	11–192	18.2 µg/m³	3.5	24h	3
2026-07-16	58	12–195	20.4 µg/m³	13.4	24h	2
2026-07-15	74	29–118	23.5 µg/m³	27.5	24h	2
2026-07-14	90	77–111	30.1 µg/m³	24.6	3h	2

Back to Granby Air Quality