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Air Quality History for Ontario, United States

Historical PM2.5 and AQI trend from monitoring stations near Ontario, United States.

41
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

460h

PM2.5 Station

460h · 2 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-07-22 19 5–33 4.6 µg/m³ 1.6 2h 14
2026-07-21 36 19–58 8.8 µg/m³ 4.0 24h 23
2026-07-20 46 14–60 11.3 µg/m³ 7.1 24h 23
2026-07-19 45 26–56 11.0 µg/m³ 7.9 24h 24
2026-07-18 38 32–48 9.1 µg/m³ 5.4 24h 24
2026-07-17 45 37–57 10.9 µg/m³ 9.5 24h 25
2026-07-16 38 32–53 9.2 µg/m³ 5.6 24h 25
2026-07-15 37 25–45 8.8 µg/m³ 5.3 24h 24
2026-07-14 39 30–46 9.3 µg/m³ 6.1 24h 23
2026-07-13 47 38–117 12.0 µg/m³ 8.1 24h 25
2026-07-12 40 28–48 9.6 µg/m³ 7.9 24h 23
2026-07-11 48 30–55 11.8 µg/m³ 10.6 24h 20
2026-07-10 54 40–62 14.0 µg/m³ 16.3 24h 24
2026-07-09 41 22–55 9.9 µg/m³ 9.0 24h 24
2026-07-08 31 25–40 7.3 µg/m³ 4.1 24h 26
2026-07-07 29 24–38 7.0 µg/m³ 4.1 24h 26
2026-07-06 30 9–40 7.1 µg/m³ 3.7 15h 21
2026-07-05 78 38–137 25.1 µg/m³ 35.7 24h 26
2026-07-04 39 32–46 9.3 µg/m³ 6.7 24h 27
2026-07-03 42 35–54 10.0 µg/m³ 7.7 24h 28
2026-07-02 46 15–54 11.1 µg/m³ 8.5 11h 26
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