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Air Quality History for Johnston, United States

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

15
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

335h

PM2.5 Station

335h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-22 13 13–13 3.2 µg/m³ 1h 2
2026-07-21 44 6–64 10.8 µg/m³ 24h 5
2026-07-20 60 20–190 19.7 µg/m³ 24h 6
2026-07-19 54 23–181 16.8 µg/m³ 24h 6
2026-07-18 56 28–98 15.9 µg/m³ 24h 6
2026-07-17 102 32–248 43.8 µg/m³ 24h 6
2026-07-16 65 20–171 22.4 µg/m³ 24h 7
2026-07-15 42 25–93 10.7 µg/m³ 24h 6
2026-07-14 38 26–53 9.1 µg/m³ 24h 6
2026-07-13 32 15–52 7.6 µg/m³ 24h 5
2026-07-12 34 19–48 8.1 µg/m³ 24h 6
2026-07-11 34 21–45 8.2 µg/m³ 24h 7
2026-07-10 34 18–48 8.1 µg/m³ 24h 6
2026-07-09 33 20–50 7.8 µg/m³ 24h 6
2026-07-08 41 21–198 14.4 µg/m³ 22h 6
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