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Air Quality History for Denver, United States

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

19
Current AQI
Good
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Trend

380h

PM2.5 Trend

380h · 37 stations

Daily Summary

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-04-18 26 18–38 6.1 µg/m³ 6.8 17h 37
2026-04-17 17 14–21 4.0 µg/m³ 19.5 15h 37
2026-04-16 16 14–18 3.8 µg/m³ 26.8 24h 37
2026-04-15 16 15–18 3.8 µg/m³ 23.8 24h 36
2026-04-14 16 8–18 3.9 µg/m³ 31.2 24h 34
2026-04-13 15 13–19 3.7 µg/m³ 15.8 16h 36
2026-04-12 17 13–20 4.0 µg/m³ 10.6 24h 36
2026-04-11 36 16–55 8.7 µg/m³ 35.3 24h 36
2026-04-10 32 18–57 7.8 µg/m³ 41.9 24h 36
2026-04-09 23 18–31 5.4 µg/m³ 47.0 18h 32
2026-04-08 17 15–18 4.2 µg/m³ 17.2 8h 36
2026-04-07 31 16–51 7.5 µg/m³ 26.8 24h 37
2026-04-06 23 10–32 5.5 µg/m³ 48.3 19h 34
2026-04-04 16 15–16 3.7 µg/m³ 10.0 14h 36
2026-04-03 16 14–17 3.8 µg/m³ 30.6 24h 36
2026-04-02 40 15–63 9.8 µg/m³ 21.9 23h 33
2026-04-01 32 4–43 7.7 µg/m³ 39.2 22h 35
2026-03-31 24 17–30 5.8 µg/m³ 42.6 21h 36
2026-03-30 18 15–23 4.3 µg/m³ 40.8 10h 36
2026-03-29 16 15–18 3.8 µg/m³ 17.2 5h 35
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