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Air Quality History for Norwalk, United States

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

30
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

462h

PM2.5 Station

462h · 5 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-21 61 24–94 17.7 µg/m³ 21h 6
2026-07-20 66 29–102 19.9 µg/m³ 24h 7
2026-07-19 72 48–98 22.2 µg/m³ 24h 7
2026-07-18 103 69–153 36.4 µg/m³ 24h 7
2026-07-17 117 53–170 45.3 µg/m³ 24h 8
2026-07-16 113 58–288 46.8 µg/m³ 24h 8
2026-07-15 76 31–156 24.8 µg/m³ 24h 6
2026-07-14 62 28–127 18.3 µg/m³ 24h 6
2026-07-13 37 22–82 9.8 µg/m³ 24h 5
2026-07-12 31 17–42 7.4 µg/m³ 24h 6
2026-07-11 37 26–48 8.9 µg/m³ 24h 6
2026-07-10 35 24–47 8.4 µg/m³ 24h 6
2026-07-09 36 25–51 8.6 µg/m³ 24h 6
2026-07-08 31 22–39 7.4 µg/m³ 24h 6
2026-07-07 32 19–96 8.2 µg/m³ 24h 6
2026-07-06 34 25–51 8.2 µg/m³ 15h 5
2026-07-05 53 29–176 16.2 µg/m³ 24h 6
2026-07-04 36 28–50 8.7 µg/m³ 24h 6
2026-07-03 43 31–60 10.5 µg/m³ 24h 6
2026-07-02 41 32–58 10.1 µg/m³ 16h 5
2026-07-01 46 45–48 11.1 µg/m³ 2h 6
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