Worst air pollution Glendale, today and tomorrow
Today (20 September): Air quality in Glendale is moderate. AQI and PM10 are moderate; PM2.5 and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (PM10: 42.1/100).
Tomorrow (21 September 2026): Air quality in Glendale is fair. AQI improves to fair; PM10 decreases to fair; all other pollutants stay as today. Pollution peaks around 3:00 AM (PM2.5: 32.2/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Glendale's air quality reflects the San Fernando Valley's partial topographic enclosure within the Los Angeles basin, with the surrounding Santa Monica, San Gabriel, and Verdugo mountains creating a significant pollution trap that concentrates vehicle emissions from I-5 and SR-134 under the region's persistent temperature inversions. The Verdugo Hills create additional topographic enclosure to the north, while the basin inversion traps local emissions throughout much of the year.
Today - 20 September | Pollution peaks at 09:00
AQI:
Moderate
42.1/100
PM2.5 (fine particles):
Fair
36.9/100
PM10 (coarse particles):
Moderate
42.1/100
NO2 (nitrogen dioxide):
Good
10.8/100
O3 (ozone):
Fair
22.7/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
1.9/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 03:00
AQI:
Fair
32.2/100
PM2.5 (fine particles):
Fair
32.2/100
PM10 (coarse particles):
Fair
29.6/100
NO2 (nitrogen dioxide):
Good
8.1/100
O3 (ozone):
Fair
28.1/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
2.8/100
Pollen forecast in Glendale
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Glendale
Frequently Asked Questions
Is air quality bad in Glendale right now?
On 20 September 2026, overall air quality in Glendale is moderate. AQI is the main air quality indicator at 42.1/100. Pollution peaks around 9:00 AM (PM10: 42.1/100).
Will air quality be worse tomorrow in Glendale?
On 21 September 2026, air quality conditions in Glendale will be better than today, with AQI forecast at fair at 32.2/100. Pollution peaks around 3:00 AM (PM2.5: 32.2/100).
When is air pollution at its worst in Glendale?
Air quality in Glendale shifts across the year, as the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin; by contrast, summer and early autumn bring the highest ozone levels, and wildfire smoke can spike particulate readings sharply from August through October. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Glendale 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
Get the full experience in the Airmine app.