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Air Quality History for Williamstown, United States

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

38
Current AQI
Good CAMS model
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 4 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-07-22 27 25–30 6.5 µg/m³ 6.2 4h 66
2026-07-21 55 35–66 14.4 µg/m³ 22.5 24h 83
2026-07-20 49 30–81 12.7 µg/m³ 13.1 24h 80
2026-07-19 58 24–74 16.4 µg/m³ 26.2 24h 82
2026-07-18 142 73–166 62.7 µg/m³ 95.6 24h 83
2026-07-17 184 158–233 114.3 µg/m³ 143.8 24h 87
2026-07-16 143 64–166 56.5 µg/m³ 96.1 24h 80
2026-07-15 56 40–64 14.8 µg/m³ 23.1 24h 85
2026-07-14 45 37–55 10.9 µg/m³ 15.3 24h 84
2026-07-13 39 31–51 9.3 µg/m³ 10.4 24h 85
2026-07-12 46 40–54 11.2 µg/m³ 16.6 24h 82
2026-07-11 52 27–63 13.3 µg/m³ 23.6 24h 68
2026-07-10 54 40–62 13.8 µg/m³ 19.8 24h 82
2026-07-09 34 23–51 8.1 µg/m³ 10.9 24h 85
2026-07-08 19 12–25 4.6 µg/m³ 3.0 19h 88
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