Worst air pollution Santee, today and tomorrow
Today (15 July): Air quality in Santee is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (PM10: 35.6/100).
Tomorrow (16 July 2026): Air quality in Santee is fair. PM2.5 decreases to good; all other pollutants stay as today. Pollution peaks around 8:00 AM (O3: 28.0/100). 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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Santee's air quality reflects San Diego County's inland valley position northeast of the urban core, with vehicle emissions from SR-52 and the surrounding suburban residential character the primary local sources. The San Diego River valley provides some ventilation, while the further inland position means Santee experiences more temperature inversion episodes than coastal San Diego, and the consistent Pacific sea breezes provide afternoon ventilation on most days while occasional Santa Ana wind events can temporarily worsen conditions.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
35.6/100
PM2.5 (fine particles):
Fair
21.2/100
PM10 (coarse particles):
Fair
35.6/100
NO2 (nitrogen dioxide):
Good
1.1/100
O3 (ozone):
Fair
26.9/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
3.5/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 08:00
AQI:
Fair
28.0/100
PM2.5 (fine particles):
Good
14.4/100
PM10 (coarse particles):
Fair
25.3/100
NO2 (nitrogen dioxide):
Good
1.4/100
O3 (ozone):
Fair
28.0/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.9/100
Pollen forecast in Santee
View pollen forecastSports venues in Santee
Frequently Asked Questions
Is air quality bad in Santee right now?
On 15 July 2026, overall air quality in Santee is fair. AQI is the main air quality indicator at 35.6/100. Pollution peaks around 8:00 AM (PM10: 35.6/100).
Will air quality be worse tomorrow in Santee?
On 16 July 2026, air quality conditions in Santee will be similar to today, with AQI forecast at fair at 28.0/100. Pollution peaks around 8:00 AM (O3: 28.0/100).
When is air pollution at its worst in Santee?
Santee experiences a distinct seasonal swing in air quality. Typically, winter typically brings the cleanest stretch, once occasional rain clears the basin, 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 Santee 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