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Air Quality History for Downtown DC, United States

Historical PM2.5 and AQI trend from monitoring stations near Downtown DC, 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 · 3 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-21 53 31–74 14.6 µg/m³ 23h 28
2026-07-20 67 40–83 19.9 µg/m³ 24h 29
2026-07-19 62 37–91 17.8 µg/m³ 24h 31
2026-07-18 130 59–158 49.9 µg/m³ 24h 31
2026-07-17 165 57–220 96.8 µg/m³ 24h 32
2026-07-16 77 54–197 28.8 µg/m³ 24h 31
2026-07-15 51 34–82 13.1 µg/m³ 24h 32
2026-07-14 40 32–52 9.6 µg/m³ 24h 29
2026-07-13 38 29–70 9.4 µg/m³ 24h 30
2026-07-12 42 29–55 10.1 µg/m³ 24h 29
2026-07-11 43 29–48 10.3 µg/m³ 24h 25
2026-07-10 44 25–75 11.3 µg/m³ 24h 28
2026-07-09 35 26–42 8.3 µg/m³ 24h 30
2026-07-08 38 26–51 9.2 µg/m³ 24h 33
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