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Air Quality History for Hayward, United States

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

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

Air Quality Index Station

478h

PM2.5 Station

478h · 107 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-10-21 36 36–36 8.7 µg/m³ — 1h 107
2026-10-20 22 16–56 5.5 µg/m³ 5.4 24h 94
2026-10-19 23 20–28 5.5 µg/m³ 11.7 24h 106
2026-10-18 34 20–42 8.2 µg/m³ 20.3 24h 98
2026-10-17 30 24–36 7.2 µg/m³ 12.8 24h 109
2026-10-16 31 23–39 7.5 µg/m³ 12.3 24h 103
2026-10-15 28 24–35 6.6 µg/m³ 12.3 24h 111
2026-10-14 25 20–39 6.0 µg/m³ 11.2 24h 111
2026-10-13 25 18–31 6.0 µg/m³ 12.1 24h 112
2026-10-12 26 23–28 6.1 µg/m³ 10.5 24h 112
2026-10-11 28 25–31 6.7 µg/m³ 14.5 24h 112
2026-10-10 30 23–50 7.1 µg/m³ 14.3 24h 101
2026-10-09 37 30–56 8.8 µg/m³ 19.9 24h 104
2026-10-08 29 25–36 7.0 µg/m³ 11.5 24h 112
2026-10-07 26 22–30 6.2 µg/m³ 12.7 24h 108
2026-10-06 31 28–39 7.5 µg/m³ 13.2 24h 108
2026-10-05 31 27–34 7.4 µg/m³ 8.5 24h 113
2026-10-04 35 18–42 8.5 µg/m³ 4.2 24h 102
2026-10-03 38 30–51 9.1 µg/m³ 7.6 24h 108
2026-10-02 37 25–53 8.8 µg/m³ 6.9 24h 111
2026-10-01 27 20–37 6.4 µg/m³ 2.1 21h 112
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