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Air Quality History for Merrillville, United States

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

45
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

477h

PM2.5 Station

477h · 216 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-10-21 54 52–57 13.8 µg/m³ 4h 218
2026-10-20 52 29–73 13.9 µg/m³ 24h 192
2026-10-19 28 21–40 6.7 µg/m³ 24h 219
2026-10-18 23 18–34 5.4 µg/m³ 24h 201
2026-10-17 16 13–23 4.0 µg/m³ 24h 218
2026-10-16 20 11–43 4.8 µg/m³ 24h 209
2026-10-15 24 14–42 5.8 µg/m³ 24h 218
2026-10-14 40 18–55 9.6 µg/m³ 24h 216
2026-10-13 35 26–52 8.3 µg/m³ 24h 216
2026-10-12 42 32–56 10.2 µg/m³ 24h 217
2026-10-11 32 28–38 7.6 µg/m³ 24h 218
2026-10-10 29 23–41 7.0 µg/m³ 24h 190
2026-10-09 32 23–46 7.7 µg/m³ 24h 194
2026-10-08 27 20–36 6.4 µg/m³ 24h 212
2026-10-07 27 23–33 6.5 µg/m³ 24h 203
2026-10-06 25 19–34 6.0 µg/m³ 24h 202
2026-10-05 29 19–38 6.9 µg/m³ 24h 211
2026-10-04 25 19–35 5.9 µg/m³ 24h 195
2026-10-03 20 15–25 4.9 µg/m³ 24h 206
2026-10-02 16 13–18 3.9 µg/m³ 24h 212
2026-10-01 55 23–60 14.5 µg/m³ 17h 213
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