What is the air quality trend in Newmarket?

Over the past 18 days, Newmarket had an average AQI of 53 based on station measurements. The worst day was 2026-07-18 with AQI 118.

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

171h

PM2.5 Station

171h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	40	38–42	9.6 µg/m³	2h	1
2026-07-20	34	19–74	9.2 µg/m³	6h	1
2026-07-19	62	26–164	25.1 µg/m³	4h	1
2026-07-18	118	30–193	58.4 µg/m³	4h	1
2026-07-17	108	87–129	38.0 µg/m³	2h	1
2026-07-14	54	46–59	14.0 µg/m³	3h	1
2026-07-13	82	53–93	26.8 µg/m³	8h	1
2026-07-12	65	57–74	18.6 µg/m³	7h	1
2026-07-11	48	21–68	12.4 µg/m³	12h	1
2026-07-10	25	17–42	6.0 µg/m³	15h	1
2026-07-09	41	30–55	10.1 µg/m³	13h	1
2026-07-08	26	6–42	6.3 µg/m³	11h	1
2026-07-07	39	31–50	9.4 µg/m³	6h	1
2026-07-06	44	30–53	10.6 µg/m³	6h	1
2026-07-05	47	34–55	11.3 µg/m³	19h	1
2026-07-04	33	27–42	8.0 µg/m³	23h	1
2026-07-03	41	32–53	10.0 µg/m³	23h	1
2026-07-02	58	46–68	15.5 µg/m³	7h	1

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