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Air Quality History for Johnstown, United States

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

28
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

278h

PM2.5 Station

278h · 3 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-22 36 28–43 8.5 µg/m³ 2h 2
2026-07-21 34 4–69 8.7 µg/m³ 18h 2
2026-07-20 38 2–62 9.6 µg/m³ 18h 2
2026-07-19 40 10–93 11.0 µg/m³ 10h 1
2026-07-18 43 20–74 11.5 µg/m³ 12h 2
2026-07-17 77 15–185 32.4 µg/m³ 8h 2
2026-07-16 101 2–500 94.6 µg/m³ 17h 1
2026-07-15 56 1–154 17.6 µg/m³ 13h 1
2026-07-14 38 5–63 9.3 µg/m³ 21h 2
2026-07-13 25 6–54 6.0 µg/m³ 10h 1
2026-07-12 26 5–48 6.3 µg/m³ 11h 1
2026-07-11 36 5–63 8.9 µg/m³ 17h 2
2026-07-10 26 4–53 6.3 µg/m³ 15h 1
2026-07-09 30 4–45 7.2 µg/m³ 19h 2
2026-07-08 19 7–47 4.5 µg/m³ 12h 2
2026-07-07 30 6–61 7.4 µg/m³ 13h 1
2026-07-06 17 5–34 4.0 µg/m³ 8h 1
2026-07-05 37 5–58 9.0 µg/m³ 16h 1
2026-07-04 22 3–65 5.4 µg/m³ 14h 1
2026-07-03 23 8–52 5.5 µg/m³ 18h 2
2026-07-02 130 16–500 202.5 µg/m³ 6h 1
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