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Air Quality History for Markham, Canada

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

49
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

422h

PM2.5 Station

422h · 5 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-08-08 59 41–69 16.5 µg/m³ 21.1 3h 3
2026-08-07 70 55–88 21.1 µg/m³ 24.3 24h 1
2026-08-06 41 10–68 10.6 µg/m³ 11.7 24h 1
2026-08-05 19 8–79 4.8 µg/m³ 5.4 24h 2
2026-08-04 9 1–19 2.2 µg/m³ 2.7 23h 2
2026-08-03 12 4–19 2.9 µg/m³ 1.0 11h 3
2026-08-02 41 9–64 10.1 µg/m³ 11.3 23h 1
2026-08-01 47 12–68 12.4 µg/m³ 14.3 24h 1
2026-07-31 22 1–74 6.0 µg/m³ 6.9 23h 2
2026-07-30 14 1–30 3.3 µg/m³ 3.1 12h 2
2026-07-29 11 4–25 2.7 µg/m³ 3.1 17h 2
2026-07-28 53 21–84 14.8 µg/m³ 17.8 24h 2
2026-07-27 62 52–75 17.3 µg/m³ 19.1 24h 2
2026-07-26 37 22–57 9.1 µg/m³ 10.0 24h 2
2026-07-25 29 10–169 9.5 µg/m³ 11.1 24h 2
2026-07-24 28 4–237 12.5 µg/m³ 14.6 24h 2
2026-07-23 11 2–34 2.7 µg/m³ 2.5 24h 2
2026-07-22 20 1–42 4.7 µg/m³ 7.2 24h 4
2026-07-21 88 8–127 30.8 µg/m³ 40.7 24h 1
2026-07-20 36 1–120 10.7 µg/m³ 14.3 16h 1
2026-07-19 22 12–42 5.2 µg/m³ 4.4 6h 2
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