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Air Quality History for Romeoville, United States

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

54
Current AQI
Moderate Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

477h

PM2.5 Station

477h · 280 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-10-21 52 52–52 12.7 µg/m³ 22.1 1h 280
2026-10-20 51 21–71 13.3 µg/m³ 1.1 24h 246
2026-10-19 28 22–41 6.7 µg/m³ 3.4 24h 279
2026-10-18 23 15–35 5.5 µg/m³ — 24h 256
2026-10-17 16 13–23 3.9 µg/m³ 4.5 24h 279
2026-10-16 20 11–41 4.7 µg/m³ 1.1 24h 267
2026-10-15 24 14–41 5.7 µg/m³ 1.6 24h 279
2026-10-14 39 18–54 9.4 µg/m³ 2.4 24h 279
2026-10-13 34 25–50 8.2 µg/m³ 1.4 24h 279
2026-10-12 42 32–55 10.2 µg/m³ 2.0 24h 279
2026-10-11 31 28–37 7.5 µg/m³ — 24h 279
2026-10-10 29 25–40 7.0 µg/m³ — 24h 241
2026-10-09 33 24–45 8.0 µg/m³ 2.1 24h 248
2026-10-08 26 20–35 6.2 µg/m³ — 24h 269
2026-10-07 26 23–30 6.4 µg/m³ 3.2 24h 258
2026-10-06 25 20–34 5.9 µg/m³ — 24h 258
2026-10-05 28 19–36 6.7 µg/m³ 9.2 24h 270
2026-10-04 26 19–35 6.1 µg/m³ 24.6 24h 248
2026-10-03 20 15–25 4.9 µg/m³ — 24h 263
2026-10-02 16 13–18 3.9 µg/m³ — 24h 270
2026-10-01 55 23–60 14.4 µg/m³ 1.7 20h 271
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