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Air Quality History for Waltham, United States

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

23
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

478h

PM2.5 Station

478h · 4 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-05-30 24 22–25 5.6 µg/m³ 2h 5
2026-05-29 23 11–35 5.4 µg/m³ 24h 4
2026-05-28 25 15–52 6.1 µg/m³ 24h 5
2026-05-27 35 28–46 8.3 µg/m³ 24h 5
2026-05-26 30 18–51 7.1 µg/m³ 24h 4
2026-05-25 31 15–184 10.6 µg/m³ 24h 4
2026-05-24 26 16–51 6.3 µg/m³ 24h 4
2026-05-23 25 17–32 6.1 µg/m³ 24h 4
2026-05-22 23 13–76 5.7 µg/m³ 24h 4
2026-05-21 20 11–32 4.7 µg/m³ 24h 4
2026-05-20 51 23–72 13.5 µg/m³ 24h 4
2026-05-19 56 37–78 14.8 µg/m³ 24h 5
2026-05-18 38 24–55 9.2 µg/m³ 24h 4
2026-05-17 36 23–52 8.5 µg/m³ 24h 5
2026-05-16 35 18–54 8.4 µg/m³ 24h 4
2026-05-15 38 20–60 9.4 µg/m³ 24h 6
2026-05-14 50 17–164 16.3 µg/m³ 24h 5
2026-05-13 39 16–97 9.9 µg/m³ 24h 6
2026-05-12 33 14–76 8.2 µg/m³ 24h 6
2026-05-11 34 13–65 8.3 µg/m³ 24h 6
2026-05-10 51 31–75 13.0 µg/m³ 20h 7
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