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Air Quality History for Norwalk, United States

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

17
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

480h

PM2.5 Station

480h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-06-09 17 4–29 4.1 µg/m³ 21.2 9h 14
2026-06-08 22 14–33 5.4 µg/m³ 5.3 24h 17
2026-06-07 26 17–41 6.3 µg/m³ 11.6 24h 17
2026-06-06 47 35–70 11.6 µg/m³ 17.9 24h 17
2026-06-05 37 25–51 8.8 µg/m³ 5.9 24h 17
2026-06-04 28 20–32 6.6 µg/m³ 2.3 24h 17
2026-06-03 22 14–28 5.3 µg/m³ 1.7 24h 17
2026-06-02 23 15–30 5.5 µg/m³ 2.1 24h 15
2026-06-01 22 15–29 5.2 µg/m³ 1.7 24h 15
2026-05-31 24 15–49 5.8 µg/m³ 17.8 24h 14
2026-05-30 18 6–28 4.3 µg/m³ 2.0 24h 15
2026-05-29 19 15–27 4.7 µg/m³ 1.5 24h 16
2026-05-28 23 13–37 5.5 µg/m³ 7.0 24h 15
2026-05-27 27 19–36 6.4 µg/m³ 5.1 24h 17
2026-05-26 37 18–152 10.5 µg/m³ 5.4 24h 15
2026-05-25 27 12–66 6.7 µg/m³ 16.9 24h 13
2026-05-24 26 12–152 7.1 µg/m³ 1.8 24h 13
2026-05-23 31 12–166 10.6 µg/m³ 1.2 24h 13
2026-05-22 16 13–21 3.9 µg/m³ 7.4 24h 15
2026-05-21 18 10–34 4.4 µg/m³ 3.5 24h 15
2026-05-20 27 19–42 6.6 µg/m³ 5.6 15h 17
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