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Air Quality History for Chicago Loop, United States

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

35
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-05-29 25 5–54 6.0 µg/m³ 1.2 23h 256
2026-05-28 28 22–39 6.7 µg/m³ 2.3 24h 258
2026-05-27 43 30–58 10.6 µg/m³ 10.2 24h 280
2026-05-26 33 27–43 7.9 µg/m³ 3.8 24h 280
2026-05-25 49 31–72 12.9 µg/m³ 10.3 24h 280
2026-05-24 52 38–59 13.0 µg/m³ 1.7 24h 280
2026-05-23 28 21–37 6.6 µg/m³ 1.2 24h 277
2026-05-22 23 19–27 5.6 µg/m³ — 24h 268
2026-05-21 22 15–39 5.2 µg/m³ — 24h 279
2026-05-20 18 16–25 4.4 µg/m³ — 24h 280
2026-05-19 25 17–40 6.0 µg/m³ — 24h 279
2026-05-18 42 18–52 10.2 µg/m³ 2.4 24h 279
2026-05-17 48 32–60 12.3 µg/m³ 4.0 24h 279
2026-05-16 34 26–51 8.3 µg/m³ 2.7 24h 278
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