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Air Quality History for Williamstown, United States

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

39
Current AQI
Good CAMS model
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

458h

PM2.5 Station

458h · 5 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-07-22 30 29–32 7.4 µg/m³ 4.7 2h 44
2026-07-21 55 35–66 14.4 µg/m³ 22.5 24h 83
2026-07-20 48 30–75 12.7 µg/m³ 13.1 24h 80
2026-07-19 58 26–74 16.4 µg/m³ 26.2 24h 82
2026-07-18 142 72–168 62.9 µg/m³ 95.6 24h 83
2026-07-17 184 159–229 115.2 µg/m³ 143.8 24h 87
2026-07-16 148 87–176 60.4 µg/m³ 96.1 24h 80
2026-07-15 57 53–63 14.9 µg/m³ 23.1 24h 84
2026-07-14 45 36–54 10.8 µg/m³ 15.3 24h 83
2026-07-13 38 31–50 9.2 µg/m³ 10.4 24h 85
2026-07-12 46 30–55 11.3 µg/m³ 16.6 24h 81
2026-07-11 53 30–63 13.7 µg/m³ 23.6 24h 67
2026-07-10 54 41–62 13.9 µg/m³ 19.8 24h 81
2026-07-09 33 23–51 7.9 µg/m³ 10.9 24h 85
2026-07-08 19 12–25 4.5 µg/m³ 2.8 24h 88
2026-07-07 28 23–38 6.8 µg/m³ 9.2 24h 88
2026-07-06 33 20–52 7.8 µg/m³ 8.2 13h 82
2026-07-05 55 48–64 14.2 µg/m³ 21.1 24h 88
2026-07-04 39 30–56 9.4 µg/m³ 9.8 24h 87
2026-07-03 57 54–61 15.0 µg/m³ 20.9 24h 87
2026-07-02 59 54–84 16.1 µg/m³ 17.6 11h 79
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