What is the air quality trend in Newmarket?

Over the past 8 days, Newmarket had an average AQI of 41 based on station measurements. The worst day was 2026-05-25 with AQI 57.

How is Newmarket air quality measured?

Air quality in Newmarket 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 Newmarket, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

169h

PM2.5 Station

169h · 10 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	27	18–36	6.4 µg/m³	1.9	9h	8
2026-05-29	42	12–120	11.5 µg/m³	12.1	24h	10
2026-05-28	28	13–79	7.0 µg/m³	1.6	24h	10
2026-05-27	43	18–156	12.1 µg/m³	6.1	24h	10
2026-05-26	43	20–90	11.3 µg/m³	6.0	24h	10
2026-05-25	57	18–156	16.5 µg/m³	11.2	24h	11
2026-05-24	38	15–91	10.2 µg/m³	7.1	24h	11
2026-05-23	55	23–162	16.8 µg/m³	3.1	16h	11

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