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Air Quality History for Markham, Canada

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

34
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

269h

PM2.5 Station

269h · 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 94 8–127 33.0 µg/m³ 22h 1
2026-07-20 36 1–120 10.7 µg/m³ 16h 1
2026-07-19 41 12–161 15.2 µg/m³ 7h 3
2026-07-18 110 31–174 54.4 µg/m³ 4h 5
2026-07-17 75 1–121 25.1 µg/m³ 15h 1
2026-07-16 107 71–151 37.5 µg/m³ 24h 1
2026-07-15 66 11–114 21.8 µg/m³ 18h 1
2026-07-14 55 52–58 14.1 µg/m³ 3h 5
2026-07-13 73 56–84 22.6 µg/m³ 8h 5
2026-07-12 68 55–88 20.1 µg/m³ 7h 5
2026-07-11 55 50–60 14.1 µg/m³ 14h 5
2026-07-10 20 1–115 4.9 µg/m³ 17h 1
2026-07-09 40 11–53 9.7 µg/m³ 13h 4
2026-07-08 27 16–41 6.6 µg/m³ 11h 5
2026-07-07 32 25–42 7.5 µg/m³ 6h 5
2026-07-06 42 28–49 10.0 µg/m³ 7h 4
2026-07-05 40 32–45 9.5 µg/m³ 20h 5
2026-07-04 31 19–40 7.4 µg/m³ 24h 5
2026-07-03 45 30–54 10.8 µg/m³ 24h 5
2026-07-02 64 42–71 18.5 µg/m³ 9h 4
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