Twenty-Five-Foot Space Simulator, La Cañada Flintridge Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (10 October): Air quality in Twenty-Five-Foot Space Simulator is moderate. AQI and O3 are moderate; PM10 is fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (O3: 55.8/100).
Air Quality Tomorrow
Tomorrow (11 October 2026): Air quality in Twenty-Five-Foot Space Simulator is moderate. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 AM (O3: 56.8/100).
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Air Quality
Today - 10 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Moderate | 55.8/100 |
| PM2.5 (fine particles) | Good | 16.9/100 |
| PM10 (coarse particles) | Fair | 20.7/100 |
| NO2 (nitrogen dioxide) | Good | 8.2/100 |
| O3 (ozone) | Moderate | 55.8/100 |
| SO2 (sulfur dioxide) | Good | 0.7/100 |
| CO (carbon monoxide) | Good | 0.5/100 |
| HCHO (formaldehyde) | Good | 1.5/100 |
| PM1 (ultrafine particles) | Good | 1.6/100 |
Tomorrow - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Moderate | 56.8/100 |
| PM2.5 (fine particles) | Fair | 25.5/100 |
| PM10 (coarse particles) | Fair | 26.9/100 |
| NO2 (nitrogen dioxide) | Good | 12.7/100 |
| O3 (ozone) | Moderate | 56.8/100 |
| SO2 (sulfur dioxide) | Good | 1.2/100 |
| CO (carbon monoxide) | Good | 0.5/100 |
| HCHO (formaldehyde) | Good | 2.4/100 |
| PM1 (ultrafine particles) | Good | 2.9/100 |
Local Environmental Conditions
Around this location in La Cañada Flintridge, a mix of built-up land and open space means traffic is an important, but not overwhelming, local pollution source. The surrounding woodland releases natural compounds that, in warm sunny weather, help form ozone. On some days, pollution drifting in from farther away outweighs local sources.
Air near roads is often at its worst from January to March, when nights cool to around 12°C and the air turns still. By contrast, ozone is the main concern from June to September, when sunny days averaging 25°C turn traffic and other emissions into ozone by mid-afternoon. From April to October, hot, dry weather raises the risk of wildfires, and their smoke can cover the area in haze.
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Frequently Asked Questions About Air Quality in California
Is air quality bad in Twenty-Five-Foot Space Simulator right now?
On 10 October 2026, overall air quality in Twenty-Five-Foot Space Simulator is moderate. AQI is the main air quality indicator at 55.8/100. Pollution peaks around 3:00 AM (O3: 55.8/100).
Will air quality be worse tomorrow in Twenty-Five-Foot Space Simulator?
On 11 October 2026, air quality conditions in Twenty-Five-Foot Space Simulator will be similar to today, with AQI forecast at moderate at 56.8/100. Pollution peaks around 3:00 AM (O3: 56.8/100).
When is air pollution at its worst in Twenty-Five-Foot Space Simulator?
Air near roads is often at its worst from January to March, when nights cool to around 12°C and the air turns still. By contrast, ozone is the main concern from June to September, when sunny days averaging 25°C turn traffic and other emissions into ozone by mid-afternoon. From April to October, hot, dry weather raises the risk of wildfires, and their smoke can cover the area in haze.
Are air quality levels in Twenty-Five-Foot Space Simulator 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.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |