Worst air pollution Vista, today and tomorrow
Today (15 July): Air quality in Vista is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (PM10: 35.8/100).
Tomorrow (16 July 2026): Air quality in Vista is fair. PM2.5 decreases to good; all other pollutants stay as today. Pollution peaks around 8:00 AM (O3: 28.9/100). 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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Vista's air quality benefits from its North San Diego County inland position receiving Pacific sea breezes from the nearby coast, though the further inland position means Vista experiences more temperature inversion episodes than coastal Carlsbad and Oceanside. Vehicle emissions from SR-78 are the primary local source, while the San Marcos and Escondido valleys create topographic variation and occasional Santa Ana wind events can temporarily worsen conditions throughout the year.
Today - 15 July | Pollution peaks at 09:00
AQI:
Fair
35.8/100
PM2.5 (fine particles):
Fair
22.8/100
PM10 (coarse particles):
Fair
35.8/100
NO2 (nitrogen dioxide):
Good
2.0/100
O3 (ozone):
Fair
28.3/100
SO2 (sulfur dioxide):
Good
4.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
4.1/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 08:00
AQI:
Fair
28.9/100
PM2.5 (fine particles):
Good
17.0/100
PM10 (coarse particles):
Fair
27.8/100
NO2 (nitrogen dioxide):
Good
2.7/100
O3 (ozone):
Fair
28.9/100
SO2 (sulfur dioxide):
Good
5.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
3.8/100
Pollen forecast in Vista
View pollen forecastFrequently Asked Questions
Is air quality bad in Vista right now?
On 15 July 2026, overall air quality in Vista is fair. AQI is the main air quality indicator at 35.8/100. Pollution peaks around 9:00 AM (PM10: 35.8/100).
Will air quality be worse tomorrow in Vista?
On 16 July 2026, air quality conditions in Vista will be similar to today, with AQI forecast at fair at 28.9/100. Pollution peaks around 8:00 AM (O3: 28.9/100).
When is air pollution at its worst in Vista?
Seasonal changes shape air quality across Vista. In short, the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin, whereas 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 Vista 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