What is the air quality trend in Peterborough?

Over the past 4 days, Peterborough had an average AQI of 45 based on station measurements. The worst day was 2026-07-17 with AQI 56.

How is Peterborough air quality measured?

Air quality in Peterborough 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 Peterborough, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

15h

PM2.5 Station

15h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-20	25	10–38	6.1 µg/m³	5h	1
2026-07-19	51	21–134	16.4 µg/m³	4h	1
2026-07-18	49	21–80	13.5 µg/m³	4h	1
2026-07-17	56	34–78	16.5 µg/m³	2h	1

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