Worst air pollution Oldest City Historic District - St. Augustine, today and tomorrow
Today (9 August): Air quality in Oldest City Historic District is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM2.5: 27.7/100).
Tomorrow (10 August 2026): Air quality in Oldest City Historic District is fair. PM2.5 decreases to good; PM10 decreases to good; all other pollutants stay as today. Pollution peaks around 8:00 AM (O3: 25.1/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
St. Augustine's Oldest City Historic District air quality reflects the historic colonial street grid, with vehicle traffic on the surrounding St. George Street pedestrian corridor and the concentrated tourism character contributing local sources. The Matanzas Bay provides limited maritime ventilation, while the neighbourhood's walkable historic character and the bay proximity generally maintain moderate St. Augustine metropolitan readings throughout most of the year.
Today - 9 August | Pollution peaks at 00:00
AQI:
Fair
27.7/100
PM2.5 (fine particles):
Fair
27.7/100
PM10 (coarse particles):
Fair
25.3/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
23.9/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
5.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 08:00
AQI:
Fair
25.1/100
PM2.5 (fine particles):
Good
19.0/100
PM10 (coarse particles):
Good
18.6/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Fair
25.1/100
SO2 (sulfur dioxide):
Good
2.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
5.5/100
Other Landmarks in St. Augustine
Frequently Asked Questions
Is air quality bad in Oldest City Historic District right now?
On 9 August 2026, overall air quality in Oldest City Historic District is fair. AQI is the main air quality indicator at 27.7/100. Pollution peaks around 12:00 AM (PM2.5: 27.7/100).
Will air quality be worse tomorrow in Oldest City Historic District?
On 10 August 2026, air quality conditions in Oldest City Historic District will be similar to today, with AQI forecast at fair at 25.1/100. Pollution peaks around 8:00 AM (O3: 25.1/100).
When is air pollution at its worst in Oldest City Historic District?
Oldest City Historic District experiences the same seasonal air quality swings as the rest of St. Augustine: the wetter summer months often see cleaner air, as frequent afternoon storms wash pollution out quickly, but without the wet season's regular storms, dry-season smoke can linger for days at a time. Inland areas tend to see more smoke buildup than locations closer to the coast.
Are air quality levels in Oldest City Historic District 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
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.
Get the full experience in the Airmine app.