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Air Quality History for Merrimack, United States

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

32
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

456h

PM2.5 Station

456h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-21 38 22–52 9.1 µg/m³ 24h 3
2026-07-20 44 15–80 11.4 µg/m³ 24h 3
2026-07-19 51 22–139 14.2 µg/m³ 24h 4
2026-07-18 68 24–149 21.4 µg/m³ 24h 3
2026-07-17 103 29–196 45.7 µg/m³ 24h 4
2026-07-16 60 23–163 18.6 µg/m³ 24h 4
2026-07-15 50 30–75 12.8 µg/m³ 24h 4
2026-07-14 42 30–67 10.1 µg/m³ 24h 4
2026-07-13 34 18–52 8.1 µg/m³ 24h 4
2026-07-12 36 20–48 8.8 µg/m³ 24h 4
2026-07-11 41 26–66 10.0 µg/m³ 24h 3
2026-07-10 36 26–48 8.7 µg/m³ 24h 4
2026-07-09 37 25–55 8.9 µg/m³ 23h 4
2026-07-08 33 24–45 8.0 µg/m³ 24h 4
2026-07-07 34 23–43 8.1 µg/m³ 24h 3
2026-07-06 33 24–46 7.9 µg/m³ 14h 3
2026-07-05 48 31–74 12.4 µg/m³ 24h 4
2026-07-04 39 22–60 9.5 µg/m³ 24h 4
2026-07-03 43 26–71 10.7 µg/m³ 24h 4
2026-07-02 38 22–54 9.2 µg/m³ 11h 3
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