Worst air pollution Hacienda Heights, today and tomorrow
Today (15 July): Air quality in Hacienda Heights is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 31.2/100).
Tomorrow (16 July 2026): Air quality in Hacienda Heights is fair. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 29.9/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Hacienda Heights' air quality reflects the Puente Hills topographic enclosure in the eastern Los Angeles basin, with vehicle emissions from SR-60 and the surrounding residential and commercial character generating elevated NOₓ under the basin's persistent temperature inversions. The Puente Hills create partial enclosure, while the basin inversion traps all local emission sources and Hacienda Heights' position in the eastern San Gabriel Valley-Puente Hills transition zone tracks at consistently elevated suburban pollution levels throughout the year.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
31.2/100
PM2.5 (fine particles):
Good
15.0/100
PM10 (coarse particles):
Fair
23.2/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
31.2/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.6/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 09:00
AQI:
Fair
29.9/100
PM2.5 (fine particles):
Good
13.8/100
PM10 (coarse particles):
Fair
23.9/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
29.9/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
2.7/100
Pollen forecast in Hacienda Heights
View pollen forecastFrequently Asked Questions
Is air quality bad in Hacienda Heights right now?
On 15 July 2026, overall air quality in Hacienda Heights is fair. AQI is the main air quality indicator at 31.2/100. Pollution peaks around 8:00 AM (O3: 31.2/100).
Will air quality be worse tomorrow in Hacienda Heights?
On 16 July 2026, air quality conditions in Hacienda Heights will be similar to today, with AQI forecast at fair at 29.9/100. Pollution peaks around 9:00 AM (O3: 29.9/100).
When is air pollution at its worst in Hacienda Heights?
Like most US cities, Hacienda Heights sees air quality shift from season to season, as winter rains provide the only real relief from an otherwise persistent haze; by contrast, summer sunshine and heat drive some of the worst ozone readings in the country. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Hacienda Heights based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app