Worst air pollution Lake Forest, today and tomorrow
Today (15 July): Air quality in Lake Forest is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 30.4/100).
Tomorrow (16 July 2026): Air quality in Lake Forest is fair. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 29.7/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Lake Forest's air quality in California benefits from its inland Orange County position receiving Pacific sea breezes through the Saddleback Valley, with vehicle emissions from I-5 and the surrounding suburban residential and commercial character the primary local sources. The Santa Ana Mountains create partial enclosure, while the valley's position between coastal and inland zones means Lake Forest experiences more temperature inversion episodes than the coastal cities.
Today - 15 July | Pollution peaks at 07:00
AQI:
Fair
30.4/100
PM2.5 (fine particles):
Good
15.7/100
PM10 (coarse particles):
Fair
24.4/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Fair
30.4/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.9/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 09:00
AQI:
Fair
29.7/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Fair
21.2/100
NO2 (nitrogen dioxide):
Good
0.7/100
O3 (ozone):
Fair
29.7/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.9/100
Pollen forecast in Lake Forest
View pollen forecastFrequently Asked Questions
Is air quality bad in Lake Forest right now?
On 15 July 2026, overall air quality in Lake Forest is fair. AQI is the main air quality indicator at 30.4/100. Pollution peaks around 7:00 AM (O3: 30.4/100).
Will air quality be worse tomorrow in Lake Forest?
On 16 July 2026, air quality conditions in Lake Forest will be similar to today, with AQI forecast at fair at 29.7/100. Pollution peaks around 9:00 AM (O3: 29.7/100).
When is air pollution at its worst in Lake Forest?
Lake Forest follows a fairly predictable seasonal air quality pattern: winter rains provide the only real relief from an otherwise persistent haze, but from August into October, wildfire smoke can add sharp particulate spikes on top of the usual summer ozone. The mountains ringing the basin can trap pollution close to the ground for days when winds are calm.
Are air quality levels in Lake Forest 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