Glen Campground, Lagunitas-Forest Knolls Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (6 October): Air quality in Glen Campground is moderate. AQI and PM10 are moderate; PM2.5 and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (PM10: 42.3/100).
Air Quality Tomorrow
Tomorrow (7 October 2026): Air quality in Glen Campground is moderate. PM2.5 increases to moderate; all other pollutants stay as today. Pollution peaks around 9:00 AM (PM10: 42.0/100).
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Air Quality
Today - 6 October
| Pollen species | Level | Value |
|---|---|---|
| AQI | Moderate | 42.3/100 |
| PM2.5 (fine particles) | Fair | 35.5/100 |
| PM10 (coarse particles) | Moderate | 42.3/100 |
| NO2 (nitrogen dioxide) | Good | 4.0/100 |
| O3 (ozone) | Fair | 22.9/100 |
| SO2 (sulfur dioxide) | Good | 1.2/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 4.1/100 |
| PM1 (ultrafine particles) | Good | 8.7/100 |
Tomorrow - 7 October
| Pollen species | Level | Value |
|---|---|---|
| AQI | Moderate | 42.0/100 |
| PM2.5 (fine particles) | Moderate | 41.8/100 |
| PM10 (coarse particles) | Moderate | 42.0/100 |
| NO2 (nitrogen dioxide) | Good | 15.3/100 |
| O3 (ozone) | Fair | 20.4/100 |
| SO2 (sulfur dioxide) | Good | 1.5/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 2.9/100 |
| PM1 (ultrafine particles) | Good | 12.3/100 |
Local Environmental Conditions
With little dense development around this site in Lagunitas-Forest Knolls, local traffic emissions are modest. Woodland in the area offers some natural filtering of particles from traffic. Air arriving from elsewhere in the region adds to what is produced locally. Levels are generally highest right next to busy roads and drop off quickly with distance.
Ozone rises a little on sunny days from June to October, but the mild summers, around 18°C, keep it in check. From December to February, cooler nights and lighter winds, with temperatures around 10°C, let traffic pollution linger near busy roads. Wildfire smoke is most likely from June to September, sometimes turning the sky hazy for days.
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Frequently Asked Questions About Air Quality in California
Is air quality bad in Glen Campground right now?
On 6 October 2026, overall air quality in Glen Campground is moderate. AQI is the main air quality indicator at 42.3/100. Pollution peaks around 10:00 AM (PM10: 42.3/100).
Will air quality be worse tomorrow in Glen Campground?
On 7 October 2026, air quality conditions in Glen Campground will be similar to today, with AQI forecast at moderate at 42.0/100. Pollution peaks around 9:00 AM (PM10: 42.0/100).
When is air pollution at its worst in Glen Campground?
Ozone rises a little on sunny days from June to October, but the mild summers, around 18°C, keep it in check. From December to February, cooler nights and lighter winds, with temperatures around 10°C, let traffic pollution linger near busy roads. Wildfire smoke is most likely from June to September, sometimes turning the sky hazy for days.
Are air quality levels in Glen Campground 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. |