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Air Quality History for Castro Valley, United States

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

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

Air Quality Index Station

478h

PM2.5 Station

478h · 110 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-05-29 20 17–23 4.8 µg/m³ 4.2 17h 110
2026-05-28 23 15–57 5.6 µg/m³ 3.7 24h 101
2026-05-27 22 20–35 5.2 µg/m³ 3.2 24h 111
2026-05-26 21 15–29 5.1 µg/m³ 3.8 24h 112
2026-05-25 18 15–23 4.4 µg/m³ 1.8 24h 111
2026-05-24 21 18–24 4.9 µg/m³ 1.4 24h 111
2026-05-23 26 23–55 6.4 µg/m³ 2.9 24h 112
2026-05-22 30 18–36 7.1 µg/m³ 4.1 24h 108
2026-05-21 40 32–47 9.6 µg/m³ 13.0 24h 112
2026-05-20 36 26–42 8.7 µg/m³ 11.4 24h 112
2026-05-19 28 18–34 6.7 µg/m³ 13.5 24h 112
2026-05-18 21 16–60 5.1 µg/m³ 4.1 24h 110
2026-05-17 33 25–38 8.0 µg/m³ 7.6 24h 111
2026-05-16 35 28–40 8.4 µg/m³ 8.9 24h 110
2026-05-15 31 28–36 7.5 µg/m³ 8.4 24h 112
2026-05-14 26 22–29 6.3 µg/m³ 5.5 24h 112
2026-05-13 23 20–29 5.5 µg/m³ 2.4 24h 112
2026-05-12 25 21–31 6.0 µg/m³ 3.2 24h 111
2026-05-11 32 25–42 7.6 µg/m³ 5.2 24h 112
2026-05-10 26 21–30 6.3 µg/m³ 4.1 24h 111
2026-05-09 32 30–34 7.7 µg/m³ 4.4 5h 110
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