Be the first to measure and contribute air quality data to your community
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality in Union
Air quality index (AQI) and PM2.5 air pollution in Union
14 people follow this city
Union Air Quality Map
Real-time Union air pollution map
AIR QUALITY DATA SOURCE
* AQI modeled using satellite data Learn more
Pollen
What is the pollen count in Union today?
 | Index | Very high | |
 | Tree pollen | Very high | |
 | Grass pollen | Very high | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in Union?
| Weather | Broken clouds |
| Temperature | 42.8°F |
| Humidity | 95% |
| Wind | 1.2 mp/h |
| Pressure | 30.3 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Mecca, California | 94 |
| 2 | Claremont, California | 83 |
| 3 | Glendora, California | 82 |
| 4 | Coachella, California | 79 |
| 5 | San Fernando, California | 79 |
| 6 | La Verne, California | 77 |
| 7 | Pahrump, Nevada | 77 |
| 8 | Alhambra, California | 75 |
| 9 | Fontana, California | 75 |
| 10 | Marina del Rey, California | 75 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
US AQI
56*
live AQI index
Moderate
Overview
What is the current air quality in Union?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 56* US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 12*µg/m³ | |
!
PM2.5
x2.4
PM2.5 concentration in Union is currently 2.4 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in Union?
 | Sensitive groups should reduce outdoor exercise |
 | Close your windows to avoid dirty outdoor air GET A MONITOR |
 | Sensitive groups should wear a mask outdoors GET A MASK |
 | Sensitive groups should run an air purifier GET AN AIR PURIFIER |
Forecast
Union air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Today | Moderate 56 AQI US | | 73.4° 42.8° |  8.9 mp/h |
| Sunday, Jun 2 | Moderate 58 AQI US |  90% | 75.2° 53.6° | 6.7 mp/h |
| Monday, Jun 3 | Moderate 60 AQI US | 60% | 78.8° 59° | 6.7 mp/h |
| Tuesday, Jun 4 | Moderate 61 AQI US | 90% | 78.8° 57.2° | 6.7 mp/h |
| Wednesday, Jun 5 | Moderate 77 AQI US | 100% | 62.6° 59° | 4.5 mp/h |
| Thursday, Jun 6 | Moderate 77 AQI US | 70% | 80.6° 59° | 11.2 mp/h |
| Friday, Jun 7 | Moderate 52 AQI US | 60% | 68° 53.6° | 11.2 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
Where is the cleanest air quality in Union?
No locations are available.
AQI US, Metric