Worst air pollution San Antonio, today and tomorrow
Today (30 August): Air quality in San Antonio is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 28.1/100).
Tomorrow (31 August 2026): Air quality in San Antonio is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (PM10: 35.7/100). Airmine updates local air quality forecasts four times daily.
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San Antonio's air quality is shaped by South Texas heat driving ozone formation from vehicle emissions across one of the US's fastest-growing cities, with the flat Edwards Plateau providing good wind dispersal but limited natural filtration. The primary concerns are summer ozone episodes and occasional dust events from the surrounding Chihuahuan Desert region.
Today - 30 August | Pollution peaks at 10:00
AQI:
Fair
28.1/100
PM2.5 (fine particles):
Fair
23.1/100
PM10 (coarse particles):
Fair
21.6/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
28.1/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
4.3/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 12:00
AQI:
Fair
35.7/100
PM2.5 (fine particles):
Fair
26.3/100
PM10 (coarse particles):
Fair
35.7/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
22.9/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
4.2/100
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Frequently Asked Questions
Is air quality bad in San Antonio right now?
On 30 August 2026, overall air quality in San Antonio is fair. AQI is the main air quality indicator at 28.1/100. Pollution peaks around 10:00 AM (O3: 28.1/100).
Will air quality be worse tomorrow in San Antonio?
On 31 August 2026, air quality conditions in San Antonio will be similar to today, with AQI forecast at fair at 35.7/100. Pollution peaks around 12:00 PM (PM10: 35.7/100).
When is air pollution at its worst in San Antonio?
San Antonio experiences a distinct seasonal swing in air quality. Typically, the cleanest air usually comes in the milder shoulder seasons of spring and autumn, while the hottest summer months consistently bring the highest ozone risk statewide. Gulf Coast humidity and inland heat can each add their own seasonal pollution patterns.
Are air quality levels in San Antonio 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: 30 August 2026 at 20:26 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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