Air Quality History for Union, United States
Historical PM2.5 and AQI trend from monitoring stations near Union, United States.
21
Current AQI
Good Station
Good Station
Air Quality Index Station
228hPM2.5 Station
228h · 1 stationTemperature GFS model
80ptPrecipitation GFS model
mm/dayDaily Summary Station
| Date | AQI | Range | PM2.5 avg | PM10 avg | Hours | Stations |
|---|---|---|---|---|---|---|
| 2026-05-29 | 6 | 5–7 | 1.5 µg/m³ | 1.5 | 2h | 1 |
| 2026-05-28 | 25 | 8–75 | 7.0 µg/m³ | 7.0 | 5h | 1 |
| 2026-05-27 | 21 | 4–52 | 5.0 µg/m³ | 5.1 | 21h | 1 |
| 2026-05-26 | 21 | 3–57 | 5.2 µg/m³ | 5.4 | 16h | 1 |
| 2026-05-25 | 41 | 11–184 | 16.3 µg/m³ | 16.9 | 18h | 1 |
| 2026-05-24 | 8 | 4–13 | 1.5 µg/m³ | 1.8 | 5h | 1 |
| 2026-05-23 | 4 | 4–5 | 1.1 µg/m³ | 1.2 | 2h | 1 |
| 2026-05-22 | 26 | 6–60 | 6.7 µg/m³ | 7.4 | 4h | 1 |
| 2026-05-21 | 14 | 6–22 | 3.3 µg/m³ | 3.5 | 2h | 1 |
| 2026-05-20 | 24 | 6–69 | 5.9 µg/m³ | 6.1 | 19h | 1 |
| 2026-05-19 | 58 | 23–92 | 17.2 µg/m³ | 17.5 | 24h | 1 |
| 2026-05-18 | 43 | 13–90 | 12.2 µg/m³ | 12.4 | 24h | 1 |
| 2026-05-17 | 20 | 4–39 | 4.7 µg/m³ | 4.8 | 24h | 1 |
| 2026-05-16 | 9 | 3–21 | 2.2 µg/m³ | 2.4 | 10h | 1 |
| 2026-05-15 | 48 | 48–48 | 11.4 µg/m³ | 12.1 | 1h | 1 |
| 2026-05-14 | 82 | 6–342 | 58.9 µg/m³ | 61.8 | 6h | 1 |
| 2026-05-13 | 22 | 3–140 | 6.9 µg/m³ | 8.1 | 11h | 1 |
| 2026-05-12 | 6 | 6–6 | 1.5 µg/m³ | 2.3 | 1h | 1 |
| 2026-05-11 | 67 | 24–179 | 27.3 µg/m³ | 28.2 | 7h | 1 |
| 2026-05-10 | 79 | 23–110 | 26.3 µg/m³ | 28.9 | 24h | 1 |
| 2026-05-09 | 29 | 12–46 | 6.9 µg/m³ | 7.0 | 2h | 1 |