Worst air pollution Visalia, today and tomorrow
Today (9 August): Air quality in Visalia is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 38.9/100).
Tomorrow (10 August 2026): Air quality in Visalia is fair. AQI improves to medium; PM2.5 increases to fair; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 9:00 AM (O3: 40.4/100). Airmine updates local air quality forecasts four times daily.
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Visalia's air quality reflects the San Joaquin Valley's enclosed basin position between the Sierra Nevada and the Coast Range, sharing the valley's California-worst air quality conditions with the additional contribution of the surrounding Tulare County dairy farming and citrus operations generating agricultural ammonia and organic emissions. The persistent valley inversion traps vehicle and agricultural emissions throughout winter, while summer ozone from the valley's vast agricultural and vehicle emission sources regularly produces some of California's highest readings.
Today - 9 August | Pollution peaks at 09:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
19.6/100
PM10 (coarse particles):
Good
7.4/100
NO2 (nitrogen dioxide):
Good
11.7/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
5.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.3/100
PM1 (ultrafine particles):
Good
13.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 09:00
AQI:
Medium
40.4/100
PM2.5 (fine particles):
Fair
20.6/100
PM10 (coarse particles):
Good
8.5/100
NO2 (nitrogen dioxide):
Good
9.7/100
O3 (ozone):
Medium
40.4/100
SO2 (sulfur dioxide):
Good
4.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
13.9/100
Pollen forecast in Visalia
View pollen forecastFrequently Asked Questions
Is air quality bad in Visalia right now?
On 9 August 2026, overall air quality in Visalia is fair. AQI is the main air quality indicator at 38.9/100. Pollution peaks around 9:00 AM (O3: 38.9/100).
Will air quality be worse tomorrow in Visalia?
On 10 August 2026, air quality conditions in Visalia will be similar to today, with PM2.5 forecast at fair at 20.6/100. Pollution peaks around 9:00 AM (O3: 40.4/100).
When is air pollution at its worst in Visalia?
Air quality across Visalia rises and falls with the seasons — the shortest stretch of clean air usually falls in the wetter winter months, whereas hot, sunny summer conditions drive persistent ozone problems, compounded by wildfire smoke risk into early autumn. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Visalia 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.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
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