Worst air pollution Fountain Valley, today and tomorrow
Today (15 July): Air quality in Fountain Valley 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 Fountain Valley 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
Use our Strava plugin to check your own exposure.
Fountain Valley's air quality benefits from its central Orange County coastal-inland transition position, with consistent Pacific sea breezes providing better ventilation than the deeper Los Angeles basin. Vehicle emissions from SR-405 are the primary local source, while the coastal proximity provides noticeably better conditions than the inland Orange County and San Gabriel Valley communities and Fountain Valley's position near the coast generally tracks at moderate Orange County suburban pollution levels throughout the year.
Today - 15 July | Pollution peaks at 07:00
AQI:
Fair
30.4/100
PM2.5 (fine particles):
Good
14.8/100
PM10 (coarse particles):
Fair
23.3/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
30.4/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.7/100
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
12.0/100
PM10 (coarse particles):
Fair
20.3/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Fair
29.7/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.7/100
Pollen forecast in Fountain Valley
View pollen forecastFrequently Asked Questions
Is air quality bad in Fountain Valley right now?
On 15 July 2026, overall air quality in Fountain Valley 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 Fountain Valley?
On 16 July 2026, air quality conditions in Fountain Valley 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 Fountain Valley?
Seasonal changes shape air quality across Fountain Valley. Typically, winter rains provide the only real relief from an otherwise persistent haze, while summer sunshine and heat drive some of the worst ozone readings in the country. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Fountain Valley 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.
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: 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