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Air Quality History for Walnut Creek, United States

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

25
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 101 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-10-21 30 26–37 7.2 µg/m³ 2.8 9h 99
2026-10-20 21 16–40 5.0 µg/m³ 5.4 24h 87
2026-10-19 23 20–29 5.6 µg/m³ 11.7 24h 97
2026-10-18 35 23–42 8.4 µg/m³ 20.3 24h 90
2026-10-17 30 25–37 7.3 µg/m³ 12.8 24h 100
2026-10-16 32 24–44 7.7 µg/m³ 12.3 24h 96
2026-10-15 28 24–38 6.7 µg/m³ 12.3 24h 102
2026-10-14 25 20–28 6.0 µg/m³ 11.2 24h 103
2026-10-13 26 19–31 6.2 µg/m³ 12.1 24h 103
2026-10-12 26 23–29 6.2 µg/m³ 10.5 24h 103
2026-10-11 29 25–32 6.9 µg/m³ 14.5 24h 104
2026-10-10 32 19–119 8.3 µg/m³ 14.3 24h 94
2026-10-09 37 30–53 8.8 µg/m³ 19.9 24h 97
2026-10-08 29 25–37 7.1 µg/m³ 11.5 24h 104
2026-10-07 26 22–30 6.4 µg/m³ 11.1 12h 105
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