What is the air quality trend in Norfolk County?

Over the past 8 days, Norfolk County had an average AQI of 51 based on station measurements. The worst day was 2026-07-16 with AQI 77.

How is Norfolk County air quality measured?

Air quality in Norfolk County 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 Norfolk County, Canada

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

149h

PM2.5 Station

149h · 4 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	42	1–84	11.1 µg/m³	21h	5
2026-07-20	37	18–72	9.1 µg/m³	22h	4
2026-07-19	44	12–74	11.2 µg/m³	23h	6
2026-07-18	56	6–161	17.1 µg/m³	21h	4
2026-07-17	66	17–225	24.3 µg/m³	20h	4
2026-07-16	77	20–297	33.7 µg/m³	22h	5
2026-07-15	58	5–131	17.5 µg/m³	19h	4
2026-07-14	32	32–32	7.7 µg/m³	1h	1

Back to Norfolk County Air Quality