Worst air pollution St. Paul Square - San Antonio, today and tomorrow
Today (9 August): Air quality in St. Paul Square is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM10: 29.0/100).
Tomorrow (10 August 2026): Air quality in St. Paul Square is fair. PM2.5 decreases to good; all other pollutants stay as today. Pollution peaks around 6:00 AM (O3: 26.5/100). Airmine updates local air quality forecasts four times daily.
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San Antonio's St. Paul Square air quality reflects the historic East Side mixed-use district, with vehicle traffic on East Commerce Street and the surrounding event venue and residential character contributing local sources. The flat terrain allows reasonable dispersal, while the neighbourhood's historic character and the consistent Texas winds generally maintain moderate San Antonio metropolitan readings throughout most of the year.
Today - 9 August | Pollution peaks at 00:00
AQI:
Fair
29.0/100
PM2.5 (fine particles):
Fair
29.0/100
PM10 (coarse particles):
Fair
29.0/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Fair
24.5/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
5.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 06:00
AQI:
Fair
26.5/100
PM2.5 (fine particles):
Good
19.3/100
PM10 (coarse particles):
Fair
20.7/100
NO2 (nitrogen dioxide):
Good
0.6/100
O3 (ozone):
Fair
26.5/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
5.0/100
Other Landmarks in San Antonio
Sports venues in San Antonio
Frequently Asked Questions
Is air quality bad in St. Paul Square right now?
On 9 August 2026, overall air quality in St. Paul Square is fair. AQI is the main air quality indicator at 29.0/100. Pollution peaks around 12:00 AM (PM10: 29.0/100).
Will air quality be worse tomorrow in St. Paul Square?
On 10 August 2026, air quality conditions in St. Paul Square will be similar to today, with AQI forecast at fair at 26.5/100. Pollution peaks around 6:00 AM (O3: 26.5/100).
When is air pollution at its worst in St. Paul Square?
Air quality at St. Paul Square shifts across the year, as the cleanest air usually comes in the milder shoulder seasons of spring and autumn; by contrast, extended summer heat waves bring the year's worst ozone readings in the state's biggest metro areas. Dust from West Texas can occasionally drift across the state and add to particulate levels.
Are air quality levels in St. Paul Square 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: 10 August 2026 at 02:34 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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