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Air Quality History for Hartford, United States

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

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

Air Quality Index Station

478h

PM2.5 Station

478h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-05-29 13 8–19 3.1 µg/m³ 14h 2
2026-05-28 20 12–59 5.0 µg/m³ 24h 2
2026-05-27 23 15–38 5.5 µg/m³ 24h 2
2026-05-26 20 8–37 4.7 µg/m³ 24h 2
2026-05-25 14 8–39 3.3 µg/m³ 24h 2
2026-05-24 18 8–35 4.5 µg/m³ 24h 2
2026-05-23 16 9–25 3.7 µg/m³ 24h 2
2026-05-22 16 9–52 3.8 µg/m³ 23h 2
2026-05-21 14 8–31 3.5 µg/m³ 24h 2
2026-05-20 35 15–55 8.6 µg/m³ 24h 2
2026-05-19 41 24–56 10.1 µg/m³ 24h 2
2026-05-18 32 17–50 7.7 µg/m³ 24h 2
2026-05-17 27 18–44 6.6 µg/m³ 24h 2
2026-05-16 22 11–40 5.4 µg/m³ 24h 2
2026-05-15 14 8–25 3.4 µg/m³ 24h 1
2026-05-14 21 11–45 4.9 µg/m³ 24h 2
2026-05-13 21 10–56 5.1 µg/m³ 24h 2
2026-05-12 17 10–37 4.1 µg/m³ 24h 2
2026-05-11 17 9–29 4.2 µg/m³ 24h 2
2026-05-10 25 18–40 6.0 µg/m³ 24h 1
2026-05-09 23 15–41 5.7 µg/m³ 9h 2
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