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Air Quality History for Ellicott City, United States

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

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

Air Quality Index Station

477h

PM2.5 Station

477h · 20 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-10-21 25 25–25 5.9 µg/m³ 2h 20
2026-10-20 23 18–32 5.4 µg/m³ 24h 18
2026-10-19 26 18–33 6.1 µg/m³ 24h 20
2026-10-18 18 16–26 4.4 µg/m³ 24h 18
2026-10-17 15 11–23 3.7 µg/m³ 24h 19
2026-10-16 30 16–49 7.1 µg/m³ 24h 19
2026-10-15 30 18–55 7.2 µg/m³ 24h 20
2026-10-14 40 35–47 9.6 µg/m³ 24h 19
2026-10-13 26 18–35 6.2 µg/m³ 24h 18
2026-10-12 16 10–26 3.7 µg/m³ 24h 19
2026-10-11 17 12–24 4.2 µg/m³ 24h 22
2026-10-10 33 23–50 7.9 µg/m³ 24h 19
2026-10-09 26 18–34 6.3 µg/m³ 24h 20
2026-10-08 27 20–36 6.5 µg/m³ 24h 22
2026-10-07 24 15–29 5.9 µg/m³ 24h 20
2026-10-06 20 17–32 4.8 µg/m³ 24h 22
2026-10-05 23 17–29 5.6 µg/m³ 24h 23
2026-10-04 20 15–28 4.8 µg/m³ 24h 22
2026-10-03 24 15–49 5.8 µg/m³ 24h 24
2026-10-02 46 38–53 11.1 µg/m³ 24h 25
2026-10-01 39 33–44 9.3 µg/m³ 19h 24
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